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DEMOLITION AND ALTERATION WORKS

GENERALLY

Demolition

a Demolition and dismantling operations are to be carried out by a competent contractor with the technical and management capabilities necessary for the scope of the particular job and with consideration to the following;Written safety policy, listing senior staff with details of qualifications and experienceQuality of labour, trained to a suitable level of competence suitable for the type of workAdequate demolition insurance coverCarried out to a safe and acceptable standard, in accordance with BS 6187 CP for demolitionCarried out in accordance with relevant guidance issued by the Health & Safety Executive

Item

All structures

b All items of demolition, clearing out, taking out and similar items shall include for all necessary temporary support and clearing away surplus materials to a tip provided by the Contractor and paying all charges. All surplus materials shall become the property of the contractor unless specified to the contrary. In addition all items of demolition shall include the making good of all surfaces disturbed in order that finished surfaces match adjacent surfaces in all respects. Item

c Where whole existing structures or part of the existing structure are shown to be demolished, include for grubbing up foundations where not to be reused, removal of floors and walls, ceiling and roof construction together with associated components, seal and or plug affected drains and make safe disconnected services. Retain, support and protect floor, wall and roof structures to be reused.

Item

Asbestos

d The nature and condition of the site & buildings cannot be fully ascertained before it is opened up, should the Contractor encounter any materials, which may be hazardous, samples are to be taken and analysed prior to further work being carried out. If asbestos is encountered the contractor is to provide a method statement for its removal and disposal, which shall be in accordance with all current legislation regarding asbestos and its removal. Item

Demolish Existing Structures

e Demolish existing structures, grub up foundations, backfilling voids with suitable granular material approved by the structural engineer and make good all surfaces affected, ready to receive new foundations and structure

Location: Existing Garage and Stores, Note the Estate will provide a dump trailer for the removal of brick rubble to be used elsewhere. All other materials to be disposed of by contractor Item

MOUNT PLEASANT, SUTTON CHENEY DEMOLITION AND ALTERATION WORKS

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DEMOLITION AND ALTERATION WORKS continued ...

Demolish Part Existing Garden Wall

a Demolish existing structures, grub up foundations, backfilling voids with suitable granular material approved by the structural engineer and make good all surfaces affected, ready to receive new foundations and structure

Location: Existing one brick thick garden wall in location and position of new extension, approximately 9m long x 2m high, Note the Estate will provide a dump trailer for the removal of brick rubble to be used elsewhere. All other materials to be disposed of by contractor Item

Relocate Existing Oil Tank

b Disconnect pipework to tank, remove tank and relocate to new position, adapt and extend pipework to new position. Re-connect to new installation

Location: In positions as shown on the drawing, provide suitable blockwork plinth as base, height 500mm and trellis fence surround with gate 2m high in treated softwood as enclosure, Include for setting posts in concrete Item

Existing External Steps and Handrail

c Remove existing steps and handrail to Patio Area and make good all surfaces affected.

Location: as shown on the drawings, East ElevationItem

Existing Canopy to Front Door

d Remove existing concrete canopy and make good all surfaces affected. Where canopy built into wall insert new precast concrete lintel (PC Sum £50)

Location: as shown on the drawings, North Elevation over external doorItem

Existing External Fixtures and Fittings

e Take down and remove all current external fixtures, fittings, fixings, and all redundant mechanical and electrical fittings and fixings including pipes and wiring and seal off services where not to be re-used. Make good all surfaces disturbed.

Location: Generally; Item

Existing Internal Fixtures and Fittings

f Clear rubbish, take down and remove all current fixtures, fittings, fixings, including cupboards, sanitary ware, kitchen fittings and worktops, curtain rails, debris and the like. Take down and remove all redundant mechanical and electrical fittings and fixings including pipes and wiring and seal off services where not to be re-used. Make good all surfaces disturbed.

Location: Generally to areas affected by the work indicated on the drawings and confirmed with the CA and Client before removal.

Item



Unit £ p


Existing Fireplaces

a Remove existing fireplaces, hearths and surrounds and make good all surfaces affected.

Location: Lounge 1 Item

Existing Ceiling Finishes

Following removal of fixtures and fittings to existing ceilings, remove existing ceiling finishes; remove all nails and tacks and leave underside of existing surface level flush to receive new finish. Make good all surfaces disturbed.

b Location: Generally and confirmed with the CA and Client before removal. Item

Existing Wall Finishes

Following removal of fixtures and fittings, remove existing wall finishes, boarding, dry lining, wall panelling and tiling. Repair surfaces, dub out as necessary and make good all surfaces disturbed, leave all surfaces level and ready to receive new finishes.

c Location: Generally and confirmed with the CA and Client before removal. Item

Existing Floor Finishes

Following removal of fixtures and fittings, remove existing floor finishes, and tiling including skirtings. Repair surfaces, and make good all surfaces disturbed, leave all surfaces level ready to receive new finishes.

d Location: Generally to areas affected by the work indicated on the drawings and confirmed with the CA and Client before removal. Note: existing quarry tiles and skirting to ground floor Hall, Dining, to be cleaned, repaired and made good as necessary to form floor finish (see later). Item

Making Good

Where walls, floors and ceilings have been removed and alteration works have been carried out, make good to marry up to existing finished surfaces in all respects.

e Location: Generally to areas affected by the work indicated on the drawings and confirmed with the CA and Client before removal. Item

Existing Staircase

f Provide all necessary temporary and permanent support, take out staircase and associated handrails, and make good floor structures, ceilings and all surfaces affected.

Location: Existing main staircase from ground floor to first floor and first floor to second floor. Item



Unit £ p


New Timber Staircases

Provide and fix bespoke timber staircases to the dimensions and form as shown on the drawings. Timber stairs to comply with BS 585. Fabricate joinery components to BS 1186:Part 2. Unless stated otherwise staircases to have a clear unobstructed minimum width of 800mm, a clear vertical headroom of 2000mm and a raking headroom of 1500mm, both clear above the pitch line. The width and depth of landings, both on flight and at the top of the stairs shall be at least as great as the staircase width.Total rise to be checked on site, minimum requirements as follows;185mm risers, 220mm minimum going, 250mm tread.

Softwood painted handrails 50mm diameter mopstick type, fixing by brackets at 900mm above line of nosings to one side of stair.

a Total rise and all dimensions for fabrication to be ascertained and to be checked on siteFinal design to be approved by the Contract Administrator and details to be submitted and approved by the local authority prior to manufacture and fixing.

Location To replace existing staircase from ground floor to first floor and first floor to second floor. Item

Existing External Doors

b Remove existing external doors including all frames; cills and lintels where not to be retained or re-used and make good all surfaces affected.

Location: Door DG2 Lobby, set aside and store door for re-use in new location Item

Existing Windows

Remove existing windows including all frames; cills and lintels where not to be retained or re-used and make good all surfaces affected.

c Location: Window WG 4 Item

Existing Internal Doors

Remove existing internal doors including all frames; thresholds and lintels where not to be retained or re-used and make good all surfaces affected.

d Location: All internal doors to be replaced Item

Form Openings In Existing External Walls

Provide all necessary temporary and permanent supports, form new openings, fill or alter openings, draw, tooth and bond to rebuild reveals with DPC where necessary and make good all surfaces affected.

e Location: a) New door opening DG2.b) New window opening to First Floor Landingc) Re-instatement of Second Floor Bed 4 En-suite, window WSN7 Item



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Form Openings In Existing Internal Walls

Provide all necessary temporary and permanent supports, form new openings, fill or alter openings, draw, tooth and bond to rebuild reveals with DPC where necessary and make good all surfaces affected.

a Location: a) New door opening to Lobby door reference DGN4b) Reposition door opening First Floor Bathroom, door reference DF3c) New door opening Second Floor Bedroom 4 Ensuite, door reference DSN1d) Door opening First Floor Landing, door reference DFN1 Item

Filling Openings To Internal Walls

Cut tooth and bond existing masonry walls and fill openings in existing walls, make good all surfaces affected.

b Location: Ground Floor Lobby door reference DG3 Item

Existing Staircase Walls

Prepare existing masonry walls to staircase area and raise walls 1100mm in height. Make good all surfaces disturbed.Plaster walls both sides, leave ready for decoration.Supply and fix to top of walls 25mm x 300mm twice rounded softwood capping piece.

c Location: Two sides of existing staircase, Second Floor Item

Existing Ground Floor Areas - Lounge and Pantry

d To existing ground floor areas, remove existing suspended timber floor and joists, ready to receive new concrete floor, make good all surfaces disturbed.

Location: Lounge and Pantry including Cellar Access Item

New Ground Floor Slab - Lounge 1 and Pantry

Excavation

e Excavate by hand area to a depth suitable for new floor construction, ensuring removal of all vegetable matter and soft spots to accommodate new floors. Apply suitable weedkiller to excavated areas. Consolidate surfaces, support sides of excavation, backfill and dispose of surplus to contractors tip. Include for any necessary hand excavation necessitated by the procedure and proximity of existing retained structure and lack of access

Location: New ground floor Lounge and Pantry Item

Hardcore

f Provide filling to Existing Cellar and lay im 150 mm minimum thickness layers compacted hardcore, provisional thickness 2000mm deep

Location: New ground floor Lounge and PantryItem



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New Ground Floor Slab - Lounge 1 and Pantry continued ...

Hardcore continued ...

a Provide and lay 150 mm minimum thickness compacted hardcore, blind surface with 50mm sand and cover with 1200 gauge (300 micron) polyethylene DPM, with all joints lapped, taped and linked with DPC.

Location: New ground floor Lounge and PantryItem

Floor Slab In Situ Concrete

b Provide and lay 100 mm thick minimum grade C30 reinforced concrete floor slab, power float and leave top surface ready to receive floor finish elsewhere described. Concrete slab to be thickened locally to 225 mm deep x 450 mm wide under non-loadbearing internal partition walls and where indicated. Into concrete slab provide and lay anto crack reinforcement mesh type A142 with 40 mm cover.Generally overall U value of floor to achieve 0.20W/m2K

Top of ground floor construction to finish flush and to provide level threshold, new floors to habitable areas as shown on the drawing.

Location: New ground floor Lounge and Pantry Item

Floor Insulation

c Lay 75mm Celotex GA4000 insulation onto DPM, with 25 mm thick strip between junction of screed and 25 mm Celotex T-Break TB3000 3025 strip expansion joint between concrete floor slab and external walls. Cover top of insulation board with polythene vapour control layer.

Location: New ground floor Lounge and Pantry. Item



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Floor screed

a Provide and lay a 1:3 cement, sand screed, trowelled level to receive floor covering where specified, minimum 65 mm thick unless stated otherwise, cured and tested in accordance with BS 4551.

The Contractor shall allow in his programme adequate drying time prior to laying floor coverings (approx 1 day per 1 mm of thickness) subject to moisture contents check. Use of concrete admixtures to comply with BS 5075. Well graded washed sharp sand to BS 882 and Portland Cement to BS 12.

Provide and lay in centre of screed a layer of light guage reinforcement mesh with 40mm cover.Screed mix to include an adhesive and bonding aid (i.e. Unibond EVA or equivalent) in the form of a tack coat and water additive carried out strictly in accordance with the manufacturers instructions.

Location: New ground floor area 75 mm thick; Lounge Item

Existing Ground Floor Areas - Hall, Lounge 2

b To existing ground floor areas to Hall, Dining, Lobby, Cloaks and Utility, clean and make good quarry tiled floors and skirtings, Re-point with matching material. Protect during carrying out of alteration works with hardboard, taped at joints.Allow for careful removal and re-fixing of skirting and tiles to facilitate injected damp proof course work to walls.

Location: Hall and Lounge 2 Item

Existing Ground Floor Areas - Lobby, Kitchen Diner

c To existing ground floor areas take up quarry tiled floors and skirtings. Leave ready to receive new ceramic tiled floor (included later).

Location: Lobby, Kitchen Diner Item

New Wall Positions

d Provide all necessary temporary and permanent support, and break out in existing concrete ground floor ready to receive new foundations for brickwork and blockwork walls (included elsewhere), make good floor structures on completion, and all surfaces affected.

Location: New Cloaks/Utility wall. Item

Ducts/Holes Through Foundations

e Where pipes or ducts pass through footings, bridge with pre-cast concrete lintel or form sleeve, in both cases allow 50mm gap all round pipe or duct and pack with Rockwool quilt.

Location: Generally. Item



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Chemical Damp Proof Course and Tanking Membrane

a Carry out all necessary preparatory work including removal of skirtings and plaster surfaces up to 1200mm high, inject a chemical damp proof course incorporating a diffusion process and tanking membrane, as supplied and installed by Preserva CSS Ltd, 15a Handyside Street, Derby, DE1 3BY Tel. 01332381975 (Provisional Sum included later for installation), and make good all surfaces affected. Provide insurance backed minimum twenty year guarantee

Location: All existing ground floor walls. Item

Woodworm Treatment to Existing Timbers

b Existing joinery and structural timbers are to be checked for defects, signs of insect attack or rot, and replaced if not in sound condition (Provisional Sum included later for replacement where necessary). Brush down all unpainted wood surfaces to all existing timbers, remove all dust and debris and apply insecticidal fluid against rot and insect infestation, by brush or spray until the surface will absorb no more, as supplied and installed by Preserva CSS Ltd, 15a Handyside Street, Derby, DE1 3BY Tel. 01332381975 (Provisional Sum included later for installation). All workmanship and materials to be carried out in accordance with the latest relevant Code of Practice issued by the British Wood Preserving Association, and the treatment must be covered by a mimimum twenty year insurance backed guarantee. No payment to the contractor will be made for this item of work until the client has been furnished with the guarantee and evidence of insurance cover. Make good all surfaces affected on completion.

Location: All existing timbers. Note existing beams to be lightly grit blasting in accordance with installer's recommendations. Item

Existing First Floor Areas

c To existing first floor areas, remove debris and prepare surfaces to receive new rigid insulation. Lay on existing concrete floor 70mm Kooltherm K3 rigid insulation board, 18mm thick moisture resistant chipboard to achieve U value of 0.22W/m2 sq kPrepare and adapt floors to suit new remodelled floor levels and final finishes to achieve level floor, including marrying up with new staircases .

Location: Generally first floor areas Item



Unit £ p


First Floor Construction Over Passage

a To existing first floor areas, remove debris and floor boards and prepare surfaces to receive new flooring. Brush down all timbers in preparation wood treatment by others, replace all decayed and damaged timbers (provisional sum elsewhere)Lay on existing timber joists new floor of 22mm thick moisture resistant particleboard flooring to BS 5669 grade C4(M), (Caberfloor or similar) screwed to joists and joints glued. 70mm Kingspan Kooltherm K3 rigid insulation board, 600 guage vapour barrier.On existing concrete screed on boarding on floor joists, insulation between joists, 120mm Celotex to achieve half hour fire resistence.Prepare and adapt floors to suit new remodelled floor levels and final finishes to achieve level floor, including marrying up with new staircases .

Location: Generally Item

Existing Second Floor Areas

b To existing second floor areas, remove debris and floor boards and prepare surfaces to receive new flooring. Brush down all timbers in preparation wood treatment by others, replace all decayed and damaged timbers (provisional sum elsewhere)Lay on existing timber joists new floor of 22mm thick moisture resistant particleboard flooring to BS 5669 grade C4(M), (Caberfloor or similar) screwed to joists and joints glued.Prepare and adapt floors to suit new remodelled floor levels and final finishes to achieve level floor, including marrying up with new staircases .

Location: Generally second floor areas Item

Existing Second Floor Areas Under New Partitions

c Where new non-load-bearing stud partitions are being constructed on existing suspended timber floor construction, the floor is to be exposed to ascertain the suitability of the existing construction and strengthened. Obtaining prior approval of the BCO before proceeding with the works, i.e. where stud partition walls run parallel with existing joists, provide double joist under bolted together at 900mm centres using toothed connectors.

Location: Generally second floor areas Item

Existing Structure - Alterations and Adaptions

d In the locations shown on the drawing carry out all work required to adapt existing structures where affected by the new alterations to the existing building.Provide all necessary permanent and temporary supports, form new openings, fill, enlarge or alter existing openings, draw, tooth and bond to existing structure and rebuild reveals with DPC where necessary. Make good all surfaces disturbed.

Location: Generally as indicated on the drawingsItem



Unit £ p


Existing Services Equipment and Installations

a Allow for disconnecting and removing all services equipment and installations, including all ductwork and ancillary fittings make good to marry up to existing and new surfaces in all respects.

Location: Generally and confirmed with the CA and Client before removal.Item

Existing Services

b Allow for disconnecting all services including gas, electric, telephone, cable, water and drainage. Set up temporary diversions and supplies and reconnect all services to their new locations as necessary. Pay all charges.

Location: Generally to areas affected by the work indicated on the drawings and confirmed with the CA and Client before removal.

Item

Existing Drains

c Rod out and clean all existing drains and leave all with free and unobstructed flow.

Location: Generally on completion and during contract if any blockage becomes evident Item

Redundant Drainage

d Where existing above ground and below ground drainage and gullies have been removed, and it is not proposed to reuse the existing drainage for the new installation, seal off, make good all holes and other works disturbed.

Location: GenerallyItem

Existing Hard Landscaped Areas

e Paved Areas. Take up and cart away external paving in any construction where affected by the new works and make good on completion. Patio slabs to be carefully taken up and stored for re-use. Store in agreed position with client.

Location Generally where affected by the works. Include for hard paved areas and associated kerbs, access and perimeter paving including existing steps, and patios. Break out subbase 100mm thick under patio and remove from site.The contractor is strongly recommended to visit site and ascertain for himself the extent of this work.

Item



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Page 37 To Summary £

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SUBSTRUCTURE

Generally

Concrete

Concrete strength to be in accordance with BS 8110: 1985 Structural use of Concrete. Cement is to be Ordinary Portland cement to BS 12 unless stated otherwise. Aggregate is to comply with BS 882 with fine aggregate to BS grading zone 1 and coarse aggregate graded from nominal maximum size stated to minimum of 5 mm.

Hardcore

Hardcore is to be well graded imported stone 75 mm down to 6 mm with the addition of approx 10% fines, to be compacted in max 150 layers using a vibrating plate or roller.

Radon Treatment

a Radon Membrane. Provide & lay a membrane suitable to protect the building from ingress of Radon gas, this membrane can also act as the damp proof membrane. To be a manufactured system comprising of minimum 300 micron un-reinforced polyethylene membrane, with min 150mm lapped and taped joints using double sided & girth jointing tape, membrane continued across cavity to external leaf of wall, with cavity tray above, linked with damp proof course. Form airtight seals around all service entry points using top-hat units sealed to membrane & service pipe with combination of jointing tape system & jubilee clip to provide fastness. Complete installation is to be carried out strictly in-accordance with the manufacturer's instructionsSystems or equivalent; Visqueen Building Products,Visqueen Radon Membrane; Ruberiod Building Products, Gas resistant membranes

Item

Foundations

b Excavate for foundations down to firm strata. Level and compact bottoms of excavations, support sides of excavation, backfill and dispose of surplus excavated material off site. Include for any necessary hand excavation necessitated by the proximity of existing buildings. Lay concrete foundations, minimum grade C20, below new walls to the form as indicated on the drawing, final design and depth to be agreed on site with Building Control Officer (BCO).

Where required by sulphate test report or BCO, all cement below ground level is to sulphate resisting to BS 4027.If the ground level or construction require stepped foundations, then the overlap of concrete at step points shall not be less than 300mm and not to be of greater height than the foundation thickness.

Item

MOUNT PLEASANT, SUTTON CHENEY SUBSTRUCTURE


Unit £ p

SUBSTRUCTURE continued ...

Foundations continued ...

Foundations to be a minimum of 450mm wide for single leaf walls, 750mm and 600mm wide for cavity walls, unless agreed with the Structural Engineer / Architect.

Allow for bottom of foundation to be not less than 750 below finished ground level, any soft spots found within excavation shall be removed, and replaced with lean mix 1;15 concrete, return fill and ram to internal sides of trench walls with consolidated hardcore.

Location As indicated on the drawings

Radon Membrane

Provide & lay a membrane suitable to protect the building from ingress of Radon gas, this membrane can also act as the damp proof membrane. To be a manufactured system comprising of minimum 300 micron un-reinforced polyethylene membrane, with min 150mm lapped and taped joints using double sided & girth jointing tape, membrane continued across cavity to external leaf of wall, with cavity tray above, linked with damp proof course. Form airtight seals around all service entry points using top-hat units sealed to membrane & service pipe with combination of jointing tape system & jubilee clip to provide fastness. Complete installation is to be carried out strictly in-accordance with the manufacturer’s instructionsSystems or equivalent;Visqueen Building Products, Visqueen Radon MembraneRuberiod Building Products, Gas resistant membranes

Location As indicated on the drawings

Ground Floor Slab

Excavation

a Excavate area to a depth suitable for new floor construction, ensuring removal of all vegetable matter and soft spots to accommodate new floors. Apply suitable weedkiller to excavated areas. Consolidate surfaces, support sides of excavation, backfill and dispose of surplus to contractors tip. Include for any necessary hand excavation necessitated by the procedure and proximity of existing retained structure and lack of access

Location: New ground floors Item

Hardcore

b Provide and lay 150 mm minimum thickness compacted hardcore, blind surface with 50mm sand and cover with 1200 gauge (300 micron) polyethylene DPM, with all joints lapped, taped and linked with DPC.

Location: New ground floorsItem



Unit £ p


Ground Floor Slab continued ...

Floor Slab In Situ Concrete

a Provide and lay 100 mm thick minimum grade C30 reinforced concrete floor slab, power float and leave top surface ready to receive floor finish elsewhere described. Concrete slab to be thickened locally to 225 mm deep x 450 mm wide under non-loadbearing internal partition walls and where indicated. Into concrete slab provide and lay reinforcement mesh type A142 with 40 mm cover.Generally overall U value of floor to achieve 0.20W/m2K

Top of ground floor construction to finish flush and to provide level threshold, new floors to habitable areas as shown on the drawing.

Location: New ground floors Item

Floor Insulation

b Lay 75mm Celotex GA4000 insulation onto DPM, with 25 mm thick strip between junction of screed and 25 mm Celotex T-Break TB3000 3025 strip expansion joint between concrete floor slab and external walls. Cover top of insulation board with polythene vapour control layer.

Location: New ground floor. Item

Ducts/Holes Through Foundations

c Where pipes or ducts pass through footings, bridge with pre-cast concrete lintel or form sleeve, in both cases allow 50mm gap all round pipe or duct and pack with Rockwool quilt. Fix over and around pipe or duct in two pieces, 9mm calcium silicate board (Masterboard) as anti-vermin barrier, set vertically flush on external face of footing. Item

Foundations: Trees

d Foundation locally to existing trees/or large shrubs are to be constructed in accordance with BS 5837 for trees in relation to construction, all as approved by Building Control Officer. New foundations running parallel close with existing foundations are to be cast in alternate bays not exceeding 1000 mm long with 4 nr mild steel reinforcement bars at all joints, to ensure integrity of existing foundations is not impaired.


Disposal of Surface Water

e Allow for keeping the excavations free from surface water by whatever means are necessary.




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Disposal of Ground Water

a Allow for keeping the excavations free from ground water by whatever means are necessary.


Walls Below DPC

b To walls below damp proof course new walls to be in Class A blockwork Tarmac Topblock or similar. Facing brick courses to be reclaimed facing bricks (PC £550 per 1000) FL Grade (note bricks will be supplied by Client, allow for sorting and stacking on site)Fill cavity with lean mix concrete from top of footings to 225mm below DPC level and seal cavity at top of all walls.Close cavity around perimeter of all openings by returning inner leaf of wall onto vertical DPC flush on outer leaf maintaining 'U' value..All masonry below ground level shall be suitable for its intended purpose. Bricks to comply with BS 3921 and precast concrete masonry units to BS 6073. Masonry cement shall not be used in foundation walls below DPC level, and sulphate resisting cement to be used below DPC level where sulphates are present.

Location: As indicated on drawings. Single storey construction of 300mm cavity wall consisting of 100mm outer skin of facing brickwork, 100mm filled cavity and 100mm inner skin of 3.5N/mm2 blockwork. Three courses of facing brickwork below dpc level Item

Cavities

c Form cavities tied together with Ancon Staifix HRT4 stainless steel wall ties. Allow for concrete infill.Wall ties to comply with the requirements of BS 5628 The use of Masonry and DD140 Recommendations for the design of Wall Ties. The exact selection and spacing's of wall tie to be determined dependant upon situation. For general purpose masonry cavity wall construction use DD140 Type 2 stainless steel wall ties at spacings of 900 mm horizontally, 450 mm vertical and staggered, and 225 mm vertically up all un-bonded reveals within 225 mm of opening. Tie to have minimum embedment of 50mm in each leaf, but 60 to 75mm preferred to allow for site tolerances. Wall ties to be pressed down into fresh mortar as works proceed and not pushed into a joint. For 50-75mm wide cavity use 200mm long ties and for 76-100mm wide cavity use 225mm long ties. Types suitable for use with partial cavity fill insulation.

Location: As indicated on drawings, 100 mm wide Item



Unit £ p


Load Bearing Internal Walls

a Load bearing ground floor internal walls to be minimum 3.5 N/mm² blockwork 100/140 mm thick, with DPC linked and lapped with DPM and built off concrete foundation.

Location: Generally, as indicated on the drawings Item

Existing Walls

b Tooth or block-bond new masonry into existing structure or alternatively connect to existing structure with a proprietary stainless steel wall tie-in system covered by an agre'ment certificate and having ties located at maximum 300 mm vertical centres.New DPC and DPM are to be linked and lapped with existing.Wall cavities are to be made continuous where new walling joins existing or new vertical DPC to be inserted..

Location: Generally, as indicated on the drawings Item

Damp Proof Course

c Provide and fix Hyload pitch polymer damp proof course to inner and outer skin of external wall.Installation and detailing of damp proof courses as set out in BS 5628, BS 8000, BS 8215 and in accordance with manufacturers instructions,Horizontal DPC in external walls to be 150 mm minimum above finished ground level.

Location: Generally, 102.5 mm 140 mm and 100 mm wide to suit wall width Item

Lintels

Provide and build in over openings new lintels as indicated, installed in accordance with manufacturers instructions and safe load tables, and generally with 150 mm min end bearing all to comply with BS 5977.

Location: Generally, as the construction necessitates to service entry positions.

Movement Joints

d Provide and fix Flexcell movement joints to inner and outer skin of external wall as required by structural engineer and Building Control Officer.Movement joints in masonry generally at not exceeding 12 metre centres or as indicated on drawing.

Location: Generally, 102.5 mm wide, pointing with mastic. Item



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STEELWORK - ISOLATED STRUCTURAL MEMBERS

Structural Steelwork Generally

a Structural steelwork to be in accordance with BS5950 and Structural Engineers specification with surface treatments as stated. Steel sections: To BS 4:Part for BS 4848 as appropriate, made from steel to BS EN 10025, grade S275.Position members accurately, using steel packs of adequate area asnecessary to achieve a true line and level; Fix securely using washers under bolt heads and nuts.Use suitably tapered, correctly aligned washers under bolt heads and nutswhich bear on sloping surfaces. Bolts: grade 8.8 SheradisedAll welds shall be minimum 6mm continuous fillet welds using grade E43 electrodes in accordance with BS 639.Connections to be designed by the fabricator to BS 5950

Item

Isolated Steel Beams

b In the locations shown on the drawing provide steelwork beams to walls as structural engineer's drawings and detail information , include for all surface treatments and where steel members exposed include for boxing in with plasterboard or Fireline board to achieve minimum half hour fire resistance as necessary.

Location: As indicated on the drawings and as the structural engineers requirements (see Provisional Sum included elsewhere)

Item

Fittings

c In the locations shown on the drawing provide all plates, clips, bolts, cleats, and all other fittings and fixings as structural drawings, include for all galvanising, and painting as necessary.

Location: As indicated on the drawings as the construction necessitatesItem

Bearing of Beams

d Provide and cast insitu concrete padstones to beams as Specification Mix RC35 to BS 5328.The concrete will be reinforced, nominal maximum size of aggregate: 20 mm, including all formwork, bedding and jointing as necessary.Ends of beams bearing on masonry, are to have a minimum 100mm bearing.Bearing of beams; Class B engineering brick spreaders to be 440mm long x 150mm deep x width of wall with full brick set centrally under beam and concrete pad-stone to be 500mm long x 225mm deep x width of wall with cast in locating fixings.

Location: As indicated on the drawings and as the structural engineers reuirements. Allow provisional number of six padstones

Item

MOUNT PLEASANT, SUTTON CHENEY STEELWORK - ISOLATED STRUCTURAL MEMBERS


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ROOF

Timber Grades

Timber and workmanship shall be suitable for the purpose for which it is intended and shall comply in all respects to BS 881, 559, 1186 and 4978. Structural timber to be softwood to BS 4978 graded in accordance with BSEN 338 1996 (previously BS 5268 pt 2) to strength classes C16 (SC3), C24 (SC4). All structural timber to be marked DRY or KD (kiln dry) All structural and external joinery timber is to be pre-treated with water-bourne vacuum pressure impregnated preservative as BS 1282, BS 5589 and BS 5268 pt 5, and complete with suppliers certificate.BS 8103 pt 2 1996 CP Timber floors and roofs for housing.

Roof Structures

Design, provide and construct complete engineered roof structure, comprising of rafters, diagonal, longitudinal and chevron bracing, and all associated components. Structure to be designed and supplied by specialist manufacture and to comply with BS 5268 structural use of timber for trussed rafter roofs, BS 2989 galvanised plate connectors and all other relevant British Standards and Agrement certificates.Prior to commencement of the works the Contractor shall submit to the Building Control Officer for approval structural calculations or manufacturers design certificate with installation drawing for the roof structure.

The design of the roof to take account of associated works, ie type of roof covering, water tanks or other equipment to be supported on the trussed rafters, position and dimensions of hatches or other openings.The following design parameters have been assumed:Dead and imposed loading in accordance with BS6399: Part 1.Basic wind speed and wind factors in accordance with CP3:ChV:Part 2.Maximum U value of roof construction 0.20W/m2K

Trussed rafters to be securely fixed to wall plate at not exceeding 600 mm centres using proprietary truss fixing clip, and bracing members (min 25 mm x 100 mm) nailed to every trussed rafter they cross with two 3.35 mm dia x 75 mm long galvanised round wire nails.

Construct roof structure to the shape and form as indicated on the drawing. Use bolt and split timber connectors to BS1579 Connectors for timber at eaves junction of rafters and ceiling joist. Fix rafters and ceiling joists to wall plate with proprietary galvanised framing anchors and birdsmouth construction as required.Allow for formation of new dormers, roof windows and rooflights, where required.

a Location: Generally to new roof areas. As indicated on the drawings and agreed with the structural engineer. Note roof structure to be exposed for stain finish. Include for re-claimed oak beams and purlins as shown on section drawing STSCL/2014/06B. Roof to be exposed rafter warm construction, insulation included later. Item

MOUNT PLEASANT, SUTTON CHENEY ROOF


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Bracing

a Provide and fix all necessary longitudinal, chevron, or any other sawn softwood bracing required in accordance with all architectural and structural drawings, or necessitated by the design of the roof.

Location: Generally to new roof areas.Item

Straps, Hangers, Clips, Carpenter's Metalwork

b Provide and fix vertical and lateral restraint straps, truss clips, shoes, hangers, framing anchors, and all galvanised or mild steel connectors required. Location: Generally to new roof areas. Item

Restraint Straps to Walls

c To external walls in the following locations where joists run parallel with walls, provide and fix 1200mm long x 30mm wide x 5mm thick galvanised mild steel straps at maximum 1800 mm centres, taken across 3 joists and turned 150mm down into cavity, with 75 x 50 mm timber blocking under strap between joists to prevent compression buckling of strap.Where wall is plastered, cover internal face of wall plate with 150 mm wide galvanised or stainless steel expanded metal lathing to provide plaster key. Location: Rafter, roof joists and ceiling joist level Item

Wall Plate

d Provide and fix 100 x 75mm wall plate on mortar bed, fixed with overall 800 mm long x 30 mm wide x 5 mm thick galvanised mild steel straps at 1800mm maximum centres. Bend strap over top of wall plate by 100 mm, screw to plate with 5 nr, and to wall plate with 2 nr No12 x 50mm long screws or 8 swg x 75 mm hardened nails.Where wall is plastered, cover internal face of wall plate with 150 mm wide galvanised or stainless steel expanded metal lathing to provide plaster key.

Location: Generally to new roof areas. Item



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Roof Covering

a Pitched roof covering to be suitable for pitch as specified on drawing, fixed in accordance with the manufacturers instructions, BS 5534 for slating and tiling, BS EN 490:1994 Concrete Roofing Tiles, product specification, relevant Code of Practice notes. Provide and lay roof covering to be on and including Proctor Roofshield low resistance vapour permeable breathable membrane held in place with counter battens; 150 laps and extended into gutters.Slate or tile colour to be to Building Control and CA satisfaction and to match existing in all respects

Softwood preservative pressure treated battens fixed with galvanised nails, size in accordance with tile manufacturers instructions, but not less than: span up to 450 mm 38 x 19 mm, span up to 600 mm 38 x 25 mm

Location: All new roof areas. Roof slates to be supplied by Client, allow for sorting and stacking on site Item

Ridges and Hips

b Provide and fix all battens, tiles, profile filler units, ventilators, straps and all other works to form the ridge and hip details to the roof. At base of hip, provide and fix 25mm wide x 6mm thick galvanised hip iron fixed to hip rafter, with two 2.65mm diameter-galvanised screws or nails.

Location: All new pitched roof areas Item

Eaves

c Provide and fix all work to form eaves detail to the roof as drawings .

Location: All new pitched roof areasItem

Verge

d Provide and fix all verge slates, battens, boarding and all other works to form the verge detail to the roof as drawings.

Location: All new pitched roof areasItem



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Roof Windows

a Form opening in roof structure with 75 wide trimming joists x depth of ceiling joists, form rooflight opening lining, complete with 13 mm wallboard lining covered with 25 mm insulation board, cover junction of lining and plasterboard with standard architrave section. Provide and build in new roof window fixed strictly in accordance with the manufacturers instructions, clear double glazed in toughened glass. Velux Conservation Range rooflights, including frame, flashings, all trimming, linings and cover moulds. Manufacturer and reference: The Velux Company Ltd. Woodside Way, Glenrothes East, Fife, Scotland KY7 4ND. Tel 01592 772211. Fix strictly in-accordance with the manufacturers instructions. Centre pivot roof window GGL pattern, complete with prefabricated flashing kit, type suitable for roof tile profile, internal roller blind. Double-glazed units, with toughened low-E outer pane and laminated inner pane, for U value of 1.5 W/m2K.

Location: In the positions shown on the drawings 6 Nr roof windows CK04 980mm high x 550mm wide, existing roof. Trimming existing roof to be agreed with structural engineer. Item

Roof Abutment

b Where roof finish abuts a wall provide proprietary insect proof abutment ventilator equal to 25mm gap full length of roof. Provide cavity tray in wall linked with code 4 lead flashing over abutment vents and code4 lead soakers. All flashings to be fixed into recessed mortar joints/formed groove minimum 25mm and fixed in using lead wedges and thereafter mortar

Location: All roof abutments against walling Item

Lead Sheet Flashings

Provide and fix milled lead to BS 1178 in flashings, weatherings and the like in the positions necessitated by the roof construction, no cement fillets will be permitted in lieu of lead work. Workmanship and materials is as stated and as recommended by the Lead Development Association 'A guide to good practice'.Soakers Code 3Flashings Code 4Valleys Code 5Securely fix all flashings with lead tacks or copper nails and provide all supporting timber work, secure all flashings in brick joints with lead wedges and pointed with 1:3 cement mortar.All leadwork to be coated in paternation oil upon completion on the day of installation

c Location: All roof areas as the new construction necessitates and as indicated on the drawings. Item



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Roof Insulation Quilt

a Supply and fix minimum 300 mm thick Rockwool insulation in roof space area between joists.

Location: Generally horizontal in two layers to roofs, 150 mm between joist/bottom chords and 150 mm on top in adjacent direction to achieve a U value of 0.16 w/m2 k - Not Required

Item

Roof and Roof Space Insulation Boards to Sloping Ceilings - Existing Roof

b Line soffit of sloping ceiling rafters with 37.5mm Celotex PL400 board, joints sealed with self adhesive aluminium tape, polythene vapour barrier lapped and taped. Batten out existing rafters with 50 x 50 mm treated softwood battens to accommodate new insulation. Fix between rafters 125mm Celotex FR500 with joints sealed with self adhesive aluminium tape. Overall construction to achieve minimum U value of 0.16 w/m²k

Location:To sloping ceilings to existing roof Item

Roof and Roof Space Insulation Boards to Sloping Ceilings - New Roof

c Line soffit of sloping ceiling rafters with 37.5mm Celotex PL400 board, joints sealed with self adhesive aluminium tape, polythene vapour barrier lapped and taped. Fix between rafters 125mm Celotex FR500 with joints sealed with self adhesive aluminium tape. Overall construction to achieve minimum U value of 0.16 w/m²k

Location: To sloping ceilings to new roof Item

Roof Access

d To ceiling of roof void, provide and fix a proprietary loft access trap, to be complete with integral closed cell seals to reduce air leakage and water vapour migration into loft space, with insulated hatch to achieve U value of 0.35 Wm2K, with hinges and integral latch. As supplied by Glidevale or similar, hinged down style, loft access trap, nominal opening size 680 x 520mm to suit joist spacing.

Location Include for 1 Nr, final position to be agreed with CA Item

Rainwater System

e Provide and fix rainwater system in-accordance Building Regulation section H3, with the gutter & outlet sized dependant upon the area being drained. Comprising of gutters, fittings and down-pipes, to comply with BS 6367 and manufactured to BS 4576, comprising of 115mm wide gutter and minimum 63mm internal diameter down-pipe. Connect down-pipes into upturned bend of surface water drain described elsewhere.

Location New roof areas, uPVC colour black on rise and fall brackets Item



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EXTERNAL WALLS

Masonry Construction, Workmanship And Materials Generally:

Shall comply with BS5628, irrespective of any other requirement of this specification.Fill cavity with lean mix concrete from top of footings to 225 mm below damp proof course level. Close cavity around perimeter of all openings, to incorporate insulation through heat loss path with U value not to exceed 0.28W/m2K. By returning inner leaf of wall onto insulated damp proof membrane i.e. Ruberiod Ruberclose, or incorporating a proprietary insulated cavity closer i.e. Thermabate. Seal cavity at top of all walls.All masonry below ground level shall be suitable for its intended purpose. Bricks to comply with BS 3921 and pre-cast concrete masonry units to BS 6073. Unless otherwise recommended by masonry manufacturer, mortar mixes shall be as follows and all mortar joints including perps are to be fully filled, and unless stated otherwise joint profile to be Bucket-handle.

Provide & build-in movement joints in masonry generally at not exceeding 12 metre centres or as indicated on drawing.

Mortar Generally

Unless otherwise recommended by brick or block manufacturer, mixes shall be as follows: Below dpc 1:3 Cement : Sand, Above dpc 1:1:6 Cement : Lime : Sand.

Masonry cement shall not be used in foundation walls below DPC level, and sulphate resisting cement to be used below DPC where sulphates are present.

Masonry External Walls - Facing Brick

a Construct shell of new structures to the form and dimensions shown on the drawing and as specified. Masonry detailing (ie eaves, verge, quoins, window heads etc) as shown.External skin of cavity wall to be 102mm nominal reclaimed facing brick outer leaf PC £550 per 1000.(note bricks will be supplied by Client, allow for sorting and stacking on site)Overall 'U' value to be 0.25 W/m²K or less, inclusive of internal wall finishes as described elsewhere.

Location: As indicated on drawings, single storey structure. Item

Internal Skin of Cavity Wall

b Construct the inner skin of the external wall above damp proof course in 100mm blockwork, to BS 6073 for precast concrete masonry blocks, unless stated otherwise to be not less than 3.5N/mm² above DPC.

Location: As indicated on drawing to single storey and Barn structuresItem

MOUNT PLEASANT, SUTTON CHENEY EXTERNAL WALLS


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Cavities - Insulated

Form insulated cavities tied together with Ancon Staifix HRT4 stainless steel wall ties, 100mm cavity partially filled with 100mm thick Dritherm 37 cavity insulation.Cavity wall insulation to be taken down below the damp proof course level, finishing at the same level as the underside of floor slab insulation. To meet the roof insulation at the top of the wall (the detail used is to allow roof ventilation to be maintained where appropriate.Cavity wall insulation must be carried up to the full extent of gable walls.

a Wall ties to comply with the requirements of BS 5628 The use of Masonry and DD140 Recommendations for the design of Wall Ties. The exact selection and spacing's of wall tie to be determined dependant upon situation. For general purpose masonry cavity wall construction use DD140 Type 2 stainless steel wall ties at spacings of 900 mm horizontally, 450 mm vertical and staggered, and 225 mm vertically up all un-bonded reveals within 225 mm of opening. Tie to have minimum embedment of 50mm in each leaf, but 60 to 75mm preferred to allow for site tolerances. Wall ties to be pressed down into fresh mortar as works proceed and not pushed into a joint. For 50-75mm wide cavity use 200mm long ties and for 76-100mm wide cavity use 225mm long ties. Types suitable for use with cavity fill insulation.

Location: As indicated on drawings, 100 mm wide. Item

Movement Joints

b Provide and fix Flexcell movement joints to inner and outer skin of external wall as required by structural engineer and Building Control Officer.Movement joints in masonry generally at not exceeding 12 metre centres or as indicated on drawing.

Location: Generally, 100 mm wide, pointing with mastic. Item



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Damp Proof Course

Installation and detailing of damp proof courses as set out in BS 5628, BS 8000, BS 8215 and in accordance with manufacturers instructions, i.e. Ruberoid Hyload System of equivalentDPC material to be minimum 2000 gauge (500 microns) polythene.Provide DPC at all cavity closures both horizontal and vertical, and continue DPC across the inner face of the outer leaf by minimum 25 mm into the cavity.Horizontal DPC in external walls to be 150 mm minimum above finished ground level.DPC joined to and continuous with damp proof membrane (DPM).Provide DPC linked with DPM in internal ground floor walls.

a Discontinuous cavity trays to be fitted with stop-ends to prevent discharge of water over end of tray into cavity and water collected on tray to be discharged to the exterior through weepholes at intervals not exceeding 1000 mm, i.e. over lintels min 2 weepholes.Damp proofing abutments, at roof and wall abutments build in damp proof cavity tray stepped up cavity 150 mm and built into inner leaf, with Code 4 lead flashing having 150 mm upstand. On raking abutments build-in stepped damp proof cavity tray and provide lead soakers to roof finish as necessary.

Location: Generally as shown on the drawing and as the construction necessitates

Item

Closing Cavities

b Close cavity around perimeter of all openings, to incorporate insulation through heat loss path with U value not to exceed 0.25W/m2K. By returning inner leaf of wall onto insulated damp proof membrane i.e. Ruberoid Ruberclose, or incorporating a proprietary insulated cavity closer i.e. Thermabate. Seal cavity at top of all walls.

Location: Generally, width of cavity 100 mm Item

Forming Window Openings

c Form window openings in the positions shown on the drawing including the provision of all special blocks/bricks etc to heads, jambs or cills and any necessary templates etc.

Location: As indicated on drawing. Item

Forming Door Openings

d Form door openings in the positions shown on the drawing including the provision any special blocks/bricks etc to heads, jambs or thresholds, and any necessary templates etc.

Location: As indicated on drawing. Item



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Connecting Walls to Existing

a Connect new masonry walls to existing structure by either toothing/blockbonding or using a proprietary stainless steel wall tie-in system, Catnic, or Furfix, wall starter profiles.

Location At junction of new and existing wallsItem

Lintels

Provide and build in over openings new lintels as indicated, installed in accordance with manufacturers instructions and safe load tables, and generally with 150 mm min end bearing all to comply with BS 5977.Steel lintels to be galvanised and on external walls to be fully filled with approved insulation material to maintain a min U-value of 0.25 W/m²K. Lintels with only 100 end bearing to have end filled with 150 plug of concrete, internal face of steel lintel to have 1/2 hour fire protection using metal lath with 25 mm Gypsum plaster or equal approved.

External wall lintels to be installed with a 2000 gauge stepped dpc over in accordance with BS 5628, extending to edge of front toe and 100 mm beyond each end of lintel to shed moisture clear of reveal in accordance with BS 5977 pt 2 1983.

b If required by BCO, calculations are to be provided for approval prior to ordering and installation. Where new lintels occur in existing walls, exact details of existing construction are to be checked to ensure suitability before ordering.Steel lintels; to be obtained from an approved supplier e.g. Catnic Ltd, IG Ltd. Birtley Building Products Ltd.

Location: Over all new openings as the construction necessitates. Item

Form opening for Extract Fan

c Form new minimum 300 x 300mm hole including lintel for extract fans, provide and build in insulated steel lintels with minimum 150mm end bearing and provide and fix Hyload pitch polymer cavity trays above all new lintels

Location: Include for 5 No vents Item



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Existing Fireplaces, Chimneys and Flues

To existing fireplaces, chimneys and flues , thoroughly clean and carry out test to flue section to ascertain condition. Repair any damage as necessary including pots,and total replacement of existing flue lining.Include for repairing and re-pointing remaining existing brickwork internally and externally.

Masonry chimneys lined with clay flue liners to have a performance at least equal to that corresponding to the designation T450 N2 S D 3 as described in BS EN 1443:1999 Fire back to BS 1251:1987

Superimposed hearth stone, brick or tiles onConstructional hearth minimum 125mm thick concrete plinth to BS 1251:1987 size minimum 500mm out from jamb minimum 150 from side of jamb (fireplace recess) 840mm wide and deep freestanding appliance as Part J (diagram 2.8 and 2.9)

Re-lining flues is a Provisional Sum included elsewhere

a All structural timbers to be minimum 40mm from face of chimney or 200mm from the flue where built in. Heating appliance / grate to be capable of burning smokeless fuel and fitted with fire guard anchorage points.

Location: Form fireplace and chimney breast in existing positions to proposed Lounge and Dining Room and connect to new chimney flue and liner. Leave all ready as working open fire and Log Burner and ready to receive fire place surround and hearth ( supply of last provisional sum included elsewhere) Item

Existing Walls - Repointing

b Remove existing mortar joints by raking out up to minimum 20mm deep and re-point in cement lime mortar to match existing in all respects, make good all surfaces disturbed

Location: Rear elevation. Item



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WINDOWS AND EXTERNAL DOORS

Joinery Generally

a All exposed arises to be pencil rounded. All dimensions on joinery work stated are finished sizes (unless stated otherwise). Joinery timber shall have maximum moisture content of 14%, external joinery maximum 19%. Adhesive shall comply with BS 1204. All beads, stops etc on stained/varnish work to have mitred junction and filler to nail holes etc to be compatible and colour matched to finish. Fabricate joinery components to BS 1186:Part 2. All joinery to be plugged and screwed to backgrounds and flush pellated

Item

Glass Generally

Installation, type and thickness of glass shall comply with the requirements of BS 952 Glass for Glazing, BS 6262 CP for Glazing, and BS 8000 part 7 Glazing workmanship on building sites and Part L of Building Regulations.All dwelling windows and doors to have sealed double glazed units with 5-year guarantee, comprising 24 mm argon gas gap between panes, low-E glazing to inner pane. To achieve U value of 1.8 W/m²K. for wood or upvc windows.

Glazed panel in door, and attached adjacent window, or where glazed within 800 mm of floor level, is to satisfy test for Class C glazing in BS 6206 1981 and each pane will be permanently marked accordingly.Folding /sliding & French doors double glazed with safety glass to BS 6262 and BS6206-1981.

Glazing in internal doors and adjacent glazing where applicable, designated as fire resistant, shall be minimum Class C and to be 6 mm polished Georgian safety wired glass (Pilkington or equivalent).

b Materials, installation, workmanship, type and thickness of glazing generally shall be in accordance with the following, BS952 Glass for glazing. BS6262 Code of practice for glazing in building. BS8000: Part 7 Code of practice for glazing.Safety Glazing in critical locations as defined in Building Regulations approved document Reg N1 to be in accordance with BS6206:1981 Specification for impact performance requirements for flat safety glass and safety plastics for use in buildings and installed safety glass panels to be permanently marked in a visible position.Glazing in doors wholly or partially within 1.5 m of the floor to be Class C, unless over 900 wide then to be Class B.Any glazing within 300mm of a door, wholly or partially to be Class C to minimum height of 1.5 m.Any glazing within 800 mm of the floor level to be Class C.Glazing in internal doors and adjacent glazing where applicable, designated as fire resistant, shall be minimum Class C and to be 6 mm polished Georgian safety wired glass (Pilkington or equivalent).

Item

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Heat Loss

a Frames of all opening elements of doors and windows to have draught stripping. To reduce excessive additional heat loss and reduce possibility of local condensation the window and door frames to overlap block-work by at least 55mm.The maximum area of the windows, doors and roof-lights taken together shall not exceed 25% of the total floor area.

Item

Timber Windows, Glazed Screens And Doors

b Provide and build in new bespoke windows, doors, sliding folding doors and frames as supplied by specialist manufacturer installed in accordance with their instructions, materials and workmanship to comply with relevant Codes of Practice, British Standards and agrement certificates including BS 644 - timber windows, BS EN 942 for timber generally.Exposure category to BS 6375-1/. Operation and strength characteristics: To BS 6375-2. Appearance class: J2 for glazing beads, drip mouldings and the like. J30 or better for all other members. Finger jointing and knots on arrises not permitted where exposed to view. Moisture content on delivery: 12-19%.

Item

c To be glazed with double glazed hermetically sealed glass units to achieve U-value of 1.6W/m²K with low-E glazing. Obscure glass to toilet/bathroom areas otherwise to be clear, unless shown otherwise,Complete with all weather-stripping on openings, opening lights and all necessary ironmongery. Weather tightness to BS 6375, glass & glazing to BS 6262/6375.

All habitable rooms to have opening windows with total area of at least 1/20th of room floor area and background ventilation of not less than 8000mm² through a trickle ventilator.

Seal the joint between the frame and wall with an outer primary seal of compatible silicone based mastic on vapour permeable impregnated foam strip, and inner secondary seal using loosely packed mineral wool or expanding foam gap filler.

Location: As indicated on the drawings to match existing windows in all respects. Softwood Item

Ventilation

d All habitable rooms to have opening lights with total area of at least 1/20 th, of the room floor area, and background ventilation of not less than 8000 mm² (ie trickle ventilation)Kitchen and WC windows to have minimum background trickle ventilation of not less than 4000 mm²Patio doors to be fitted with louvre vent to give 10000 mm² separate ventilated opening.

Item



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WINDOWS AND EXTERNAL DOORS continued ...

Window Boards

a Provide and build in to windows internally, window board, once rounded to project internally by 18 mm past the finished wall surface.

Location: All windows and glazed screens, 15mm thick MDF boardItem

Pointing Frames

b Include for pointing all frames internally and externally with external quality polysulphide mastic.

Location: All windows and external doors, Item

Ironmongery Generally

c Unless specified otherwise, select ironmongery to comply with the recommendations of the Association of Builders' Hardware Manufacturers Code of practiceAll doors on escape routes will not have locking devices which require the use of a key (or similar) on the escape side.External emergency exit doors to be fitted with panic bolt securing mechanismsAll doors forming part of the means of escape must be readily openable and available at all times whilst the premises are occupied and only fitted with suitable hardware to allow easy egress without the use of a key.

Location: All new windows and external doors where not provided by window and door manufacturer, the quality of ironmongery to be approved to match supplied by window and door manufacturer

Item

External Doors Concrete Landing

Change of level outside external door forming part of the means of escape to have a concrete landing projecting beyond the leading edges of the door when in the open position.

Location: Generally



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INTERNAL WALLS

Partition Walls: Non Loadbearing Stud Partitions

a Provide and construct non-loadbearing metal/timber stud partitions with 50 x 100 sw sole plate, head and vertical studs at 450 maximum centres with 2 rows noggins, fully fill gap between studs with 100mm thick Rockwool Flexi insulation. Partitions built off suspended timber floors, ensure sole plate is supported on joists at max 450 mm centres or provide and fix blocking pieces between joists at 450 max centres, 75 mm wide x depth of joists. Line both sides of stud partitions with 12.7 mm Gypsum plasterboard to receive plaster finish.Skim surfaces of plasterboard walls with 3 mm of plaster (included elsewhere).

Location In the locations shown on the drawing, existing house Bedroom 1 and Bedroom 3 on first floor. New cupboard Dressing Room and Bedroom 4 on second floor

Item

Internal Loadbearing Wall Construction

b Provide and construct 100 mm blockwork to BS 6073 for precast concrete masonry blocks, (unless stated otherwise to be not less than 3.5N/mm²) built off concrete foundation, with horizontal dpc linked with dpm.Allow for blockwork movement joints as structural engineer's details

Location As indicated on the drawings, existing house to form New UtilityItem

Forming Internal Door Openings

c Form internal door openings in the positions shown on the drawing including the provision of any necessary templates, etc.

Location: As indicated on drawingsItem

Fire proofing to internal walls

d Provide fire proofing at top of internal walls to soffit of roofing with Rockwool mineral fibre quilt

Location Roof space to full height partitionsItem

Lintels

e At the heads of internal doors and openings, provide and build in Catnic, or other equal and approved, steel lintels with minimum 150 mm end bearing .

Location In the locations shown on the drawingItem

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Blank Opening

a At head of blank openings and where structural walls removed, provide and build in lintels with minimum 150mm end bearing.

Location As indicated on drawingsItem

Existing Structure

b In the locations shown on the drawing carry out all work required to adapt existing structures where affected by the new extension and alterations to the existing building.Provide all necessary temporary supports, form new openings, fill, enlarge or alter existing openings, draw, tooth and bond to existing structure and rebuild reveals with DPC where necessary. Make good all surfaces disturbed.

Location: Generally, as indicated on drawings and necessitated by the worksItem



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INTERNAL DOORS

Joinery Generally

a All timber to BS EN 942.All exposed arises to be pencil rounded. All dimensions on joinery work stated are finished sizes (unless stated otherwise). Joinery timber shall have maximum moisture content of 14%, external joinery maximum 19%. Adhesive shall comply with BS 1204. All beads, stops etc on stained/varnish work to have mitred junction and filler to nail holes etc to be compatible and colour matched to finish. Fabricate joinery components to BS 1186:Part 2. All joinery to be plugged and screwed to backgrounds and flush pellated

Item

Glass Generally

b Installation, type and thickness of glass shall comply with the requirements of BS 952 Glass for Glazing, BS 6262 CP for Glazing, and BS 8000 part 7 Glazing workmanship on building sites and Part L of Building Regulations.All dwelling windows and doors to have sealed double glazed units with 5-year guarantee, comprising 24 mm argon gas gap between panes, low-E glazing to inner pane. To achieve U value of 1.8 W/m²K. for wood or upvc windows.Glazed panel in door, and attached adjacent window, or where glazed within 800 mm of floor level, is to satisfy test for Class C glazing in BS 6206 1981 and each pane will be permanently marked accordingly.Folding /sliding & French doors double glazed with safety glass to BS 6262 and BS6206-1981.

Glazing in internal doors and adjacent glazing where applicable, designated as fire resistant, shall be minimum Class C and to be 6 mm polished Georgian safety wired glass (Pilkington or equivalent).Materials, installation, workmanship, type and thickness of glazing generally shall be in accordance with the following, BS952 Glass for glazing. BS6262 Code of practice for glazing in building. BS8000: Part 7 Code of practice for glazing.

Safety Glazing in critical locations as defined in Building Regulations approved document Reg N1 to be in accordance with BS6206:1981 Specification for impact performance requirements for flat safety glass and safety plastics for use in buildings and installed safety glass panels to be permanently marked in a visible position.Glazing in doors wholly or partially within 1.5 m of the floor to be Class C, unless over 900 wide then to be Class B.Any glazing within 300mm of a door, wholly or partially to be Class C to minimum height of 1.5 m.Any glazing within 800 mm of the floor level to be Class C. Item

MOUNT PLEASANT, SUTTON CHENEY INTERNAL DOORS


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INTERNAL DOORS continued ...

Glass Generally; continued

aGlazing in internal doors and adjacent glazing where applicable, designated as fire resistant, shall be minimum Class C and to be 6 mm polished Georgian safety wired glass (Pilkington or equivalent).

Item

Internal Doors

b Supply and fix new internal doors for paint finish and hang on 1 1/2 pairs of 75 mm heavy duty non-ferrous butts to linings, timber doors, frame, and ironmongery, sizes and finish as shown on drawings.

Location As indicated on the drawings . Ledged and braced style doors to be supplied by Howdens Joinery or other equal and approved. All new and existing internal door positions Item

Internal Doors Fire Rated

c Fire rated doors to be to BS 476 pt 22 Fire Door Certificates. To be 30 minute fire-rated, and self-closing, door-frame to be complete with a intumescent strip recessed into both jambs and head.Supply and fix new fire rated internal doors for paint finish and hang on 1 1/2 pairs of 75 mm heavy duty non-ferrous butts to linings, timber doors, frame, and ironmongery, sizes and finish as shown on drawings.

Location As indicated on the drawings and door schedule. Ledged and braced style doors to be supplied by Howdens Joinery or other equal and approved. DGN6, DGN7, DFN2, DFN5, DSN2

Item

Internal Doors - glazed

d Provide and fix glazed internal doors, minimum 44mm thick, all for clear paint finish. Rebated for double glazing with splayed glazing beads, Include for rebated meeting stile, glazing & ironmongery. Doors to be supplied with glazed panels as installed by door manufacturer with type of timber beading and bedding sealant suitable for situation

Location As indicated on the drawings and door schedule. Non required Item

Internal door linings

e Provide and fix 32 mm thick x width of partition wall, door linings. Include for softwood packing behind frame where necessary to ensure full width architrave both sides. 25mm x 25mm stops planted on. One coat primer paint to be applied before fixing.To fire doors fix in groove in lining, intumescent smoke and fire seal. Height of door linings to allow for tolerances between door and lining and for clearance for floor finish.

Location As indicated on the drawings and door schedule Item



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Architrave

a Supply and fix minimum 44mm x 19mm softwood architraves. One coat primer paint to be applied before fixing.

Location Architraves to both sides of new internal door openings and one side of external door openings, to match existing

Item

Ironmongery Generally

b Unless specified otherwise, select ironmongery to comply with the recommendations of the Association of Builders' Hardware Manufacturers Code of practice

Provide and fix the following new ironmongery to be as supplied by door manufacturer or Albert Marston or other equal approved standard. All to match existing and to be Heritage range colour black

Internal Doorsi) Lever handles ii) Tubular mortice latch iii) Door stop iv) Mortice bathroom latch with thumb turn and emergency release escutcheon to toilet doors

Item



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WALL FLOOR AND CEILING FINISHES

Requirements for Air Tightness: Finishes Generally

a Generally seal around the perimeter of the floor/skirting board and walls with a flexible sealant.Plasterboard on dabs to have a continuous ribbon of adhesive around all openings, along the top and bottom of the wall, and at internal and external corners.

Once ceilings are fixed seal all gaps between the ceiling and wall with either plaster, adhesive or flexible sealant.

Apply flexible sealant to all interfaces between the internal air barrier and the window or door frame members.

Flexible sealant should be applied to the junction between the plasterboard and cill board and between the cill board and window frame member.


Making Good: Generally

b Generally make good all existing wall, floor and ceiling finishes where retained and/or affected by the works with the same finish and material to match new works unless stated otherwise.

Location: All areas where affected by the new works Item

Floor screed

c Provide and lay onto concrete slab a 1:3 cement, sand screed, trowelled level to receive floor covering where specified, minimum 75 mm thick unless stated otherwise, cured and tested in accordance with BS 4551.

The Contractor shall allow in his programme adequate drying time prior to laying floor coverings (approx 1 day per 1 mm of thickness) subject to moisture contents check. Use of concrete admixtures to comply with BS 5075. Well graded washed sharp sand to BS 882 and Portland Cement to BS 12.

Provide and lay in centre of screed a layer of light guage reinforcement mesh with 40mm cover.Screed mix to include an adhesive and bonding aid (i.e. Unibond EVA or equivalent) in the form of a tack coat and water additive carried out strictly in accordance with the manufacturers instructions.

Location: New and existing ground floor areas as shown 75 mm thick Item

MOUNT PLEASANT, SUTTON CHENEY WALL FLOOR AND CEILING FINISHES


Unit £ p

WALL FLOOR AND CEILING FINISHES continued ...

Upgrading Existing External Walls

Insulate internal face of external wall. Fix Celotex GA 4000 by over battening with treated softwood battens 25 x 50mm at 600 centres. Tape joints of insulation with self adhesive aluminium foil tape and seal perimeter edges with mastic. Fix one layer of 12.7mm Gyproc to battens and apply 3mm plaster skim coat, all in accordance with manufacturer's recommendation.Including galvanised metal beads for internal plastering as BS 6452Form neat junctions at interfaces of new and existing construction including dubbing out as necessary.U value is 0.22 W/m sq K

a Location: Generally, existing external wallsItem

Existing Internal Walls

b To internal faces of masonry walls, fix Gyproc Dri-Wall System with 9.5mm Gyproc plasterboard to plaster dabs, finished with a 3mm plaster skim coat. Plaster dabs, suitable for background, all in accordance with manufacturer's recommendation.Including galvanised metal beads for internal plastering as BS 6452Form neat junctions at interfaces of new and existing construction including dubbing out as necessary. Finish with wall board primer ready for decoration

Location Generally existing remaining internal walls and area of existing external wall in position of new extension

Item

Plaster to New Blockwork Walls

c To faces of masonry walls, apply two coats plaster, comprising of 11 mm backing coat, and 2 mm finish, as supplied by British Gypsum, type suitable for background. all in accordance with manufacturer's recommendation.Including galvanised metal beads for internal plastering as BS 6452Form neat junctions at interfaces of new and existing construction including dubbing out as necessary.

Location Generally new blockwork external walls and two sides of all blockwork internal partitions

Item

Skim Coat to New Internal Studwork

d To internal faces 12.5 mm Gyproc plasterboard partitions (included elsewhere in internal partitions) apply 3mm plaster skim coat of Gyproc plaster, all in accordance with manufacturer's recommendation.Including galvanised metal beads for internal plastering as BS 6452Form neat junctions at interfaces of new and existing construction including dubbing out as necessary.

Location Generally new internal studwork walls Item



Unit £ p


Plaster to soffit of lintels

a To internal soffit of lintels to external walls provide and fix any necessary expanded lathing and plaster with 25 mm Gypsum plaster or equal approved.

Location Generally new lintels Item

Skirting

b Supply and fix minimum wrought 94mm x 19 mm softwood skirting. Quality of timber and fixing: To BS 1186:Part 3. All to match existing.Fill each nail head with wood and glue. Finish off flush with surface

Location New walls and partitions all except areas to receive ceramic tiles, vinyl flooring

Item

Wall Tiling Generally

Ceramic wall tiling to be set in adhesive suitable for substrate and grouted up, type suitable for location, including all necessary cutting and fitting. Materials and Workmanship to comply with the following standards.BS6431 P+, 9 Ceramic Wall Tiles Pilkington or similar and approvedBS5980 AdhesivesBS5385 P+1:14 GroutsBS5385 P+1:13 Sealants and back up materialsBS8000 P+11 Code of Practice for wall & floor tiling

Location Walls generally PC sum for supply of tiles £30/m2. Ceramic tiles 150mm x 150mm. Two courses high to splashback behind washbasins and sinks. Bathrooms and Ensuites to be tiled to half wall height. Shower to be tiled full height to surrounding walls.

Ceiling Finish

c To new ceiling areas and around relevant beams, provide and fix 12.7mm Gyproc plasterboard with 50 x 50 mm noggins to support all unsupported edges and joints of plasterboard. Skim surface of boarded ceilings and beams with 3mm plaster

Location: All new and existing ceilings. Item



Unit £ p


Vinyl Flooring

a Provide and lay vinyl flooring in accordance with BS8203 installation of sheet and tile flooring and the manufactures instructions, colour to Contract Administrators approval.Prepare sub-floor, apply latex levelling screed as necessary and lay vinyl flooring in recommended adhesive and sealants. Provide aluminium cover strips at abutments of different floor finishes, type suitable for location.Sheet vinyl flooring to have hot welded joints and all exposed edges sealed to prevent moisture penetration of sub-floor, seal around pipes or items protruding through the flooring . Form 100mm high integral self-coved vinyl skirting with 38mm radius cove former, finish legs of skirting with capping seal, type suitable for location.Manufacturer: Karndene Designflooring or similar and approvedEdging and cover strips to be by Gradus Ltd, aluminium finish with matching fasteners, type to suit location and floor finishes.

Location: As indicated on the drawings, non slip vinyl, colours to Contract Administrator's approval. En-suites, Bathrooms Shower Rooms and WCs

Item

Ceramic Tiled Flooring

b Provide and lay ceramic non slip floor tiles BS 6431 Class 1, with 100 high combination square top cove skirting all laid strictly in accordance with the manufacturers instructions using the semi dry bedding technique minimum 40 mm thick.

Grout up all joints with epoxy based waterproof grout type 'Corrojoint' or similar type suitable for wet area situations.

Prior to laying tiles treat surface of concrete slab and up adjacent wall 100 mm high with three coats RIW liquid asphaltic composition, blend top coat with sand whilst tacky.

Location: Kitchen Diner, Utility, Cloaks and Lobby; colours and pattern to Contract Administrator's approval. PC Sum for supply £35/m2

Item



Unit £ p


Carpet Flooring

a Provide and lay carpet flooring in accordance with the manufactures instructions, colour to Contract Administrators approval.Prepare sub-floor, apply underlay as necessary and lay carpet flooring (PC Sum for carpet supply and fit £25/m2). Provide aluminium cover strips at abutments of different floor finishes, type suitable for location.Manufacturer: To be approvedEdging and cover strips to be by Gradus Ltd, aluminium finish with matching fasteners, type to suit location and floor finishes.

Location: All habitable rooms except wet areas and Kitchen; Include for staircases and landing, colours to Client's approval.

Item

Painter: Generally

b All painting materials shall be manufactured and supplied by one of the following manufacturers or as specified elsewhere:

ICI, Crown, Akzo Coatings. Kalon Decorative Products

All surfaces are to be prepared in accordance with the manufacturers requirements and the quotation is to include for all such preparatory work. No decorating is to be carried out on surfaces that are not thoroughly dry, nor when the temperature is below 2 degree centigrade nor under adverse weather conditions such as rain, fog etc. All works to be finished in tints selected by the employer.

Item

Emulsion Paint to Plastered Walls and Ceilings

c Prepare and apply 1 mist and 2 full coats of matt "diamond" emulsion to walls and ceilings. Colours to be agreed.

Location: Generally to new plastered surfaces Item

Painting to timber internally

d Softwood.Primer to be applied to all faces prior to installation.Prepare, prime and apply two undercoats and one coat gloss paint to all timber surfaces. Colours to be agreed.

Hardwood.Prepare and apply three coats clear finish Location: Generally to all new and existing timber surfaces

Item



Unit £ p


Painting to timber externally

a Softwood.Primer to be applied to all faces of new timber prior to installation.Prepare, prime and apply two undercoats and one coat gloss paint to all timber surfaces. Colours to be agreed.

Hardwood.Prepare and apply three coats clear finish.

Location: Generally to all new and existing timber surfaces Item

Painting To Timber Surfaces

b Softwood and MDF.Primer to be applied to all faces of new timber prior to installation.Prepare, prime and apply one undercoat and one coat gloss paint to all new timber surfaces. Colours to be agreed.

Hardwood.Prepare and apply three coats clear finish or stain.

Location: Generally to timber surfaces Item

Painting New Metal Surfaces

c Prepare, prime and apply two undercoats and one coat gloss paint to all new metal surfaces. Colour to be agreed

Location: Generally to new and existing metal surfaces including exposed steelwork, and exposed pipework

Item



Unit £ p

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GENERAL FIXTURES/FURNISHINGS AND EQUIPMENT

Fitted Kitchen Units and Worktops

Supply and fix kitchen units, worktops and sinks complete with taps, plug, chain, and connect up to drainage and water services, as shown on drawings

The supply and fix part of the works is the Subject of a Provisional Sum included elsewhere

MOUNT PLEASANT, SUTTON CHENEY GENERAL FIXTURES/FURNISHINGS AND EQUIPMENT


Unit £ p

SANITARY AND DISPOSAL INSTALLATIONS

The supply of the Sanitaryware items is a Provisional Sum included elsewhere

Wash hand Basins Vanity Units and Sinks

a Fix only ceramic wash hand basins, vanity units and sinks complete with taps, plug, chain, and connect up to drainage and water services, as shown on drawings

Location: In the locations shown on the drawingsItem

WC's

b Fix only ceramic WC pans and cisterns complete with all associated fittings and fixings, and connect up to drainage and water services, as shown on drawings


Showers and Shower Enclosures

c Fix only shower, shower enclosures and shower tray complete with all associated fittings and fixings ,and connect up to drainage and water services, as shown on drawings


Vanity Basins

d Fix only vanity basins and vanity units complete with all associated fittings and fixings ,and connect up to drainage and water services, as shown on drawings


Baths

e Fix only baths and panels complete with all associated fittings and fixings, and connect up to drainage and water services, as shown on drawings.


Washer/Dryer Position

f Supply (by client) and fix complete with all associated fittings and fixings, and connect up to drainage and water services, as shown on drawings.

Location: Kitchen and Utility AreaItem

MOUNT PLEASANT, SUTTON CHENEY SANITARY AND DISPOSAL INSTALLATIONS


Unit £ p

SANITARY AND DISPOSAL INSTALLATIONS continued ...

Sink Tops

a Fix only sink tops and drainers complete with all associated fittings and fixings ,and connect up to drainage and water services, as shown on drawings

Location: Kitchen and Utility AreaItem

Above Ground Drainage Generally

b Generally to be in accordance with Building Regulations Section H1 and BSEN 12056 gravity drainage systems inside buildings.Design, provide and fix a complete above ground drainage installation in accordance with BS 5572 including where necessary soil and vent pipe, overflows, wastes, traps and all fittings in high temperature UPVC, including fittings, cleaning eyes, solvent welding, seal ring joints, clips and brackets for fixing to any surface. Include for all holes through walls etc and for making good surfaces.

Installation to be strictly in accordance with the manufacturers instructions, with 75 mm deep seal traps to all appliances with anti syphonic type where runs exceed code, upvc waste pipes with rodding eyes at all changes of direction, size as follows or 50 mm diameter for more than one appliance.

Location:32mm dia. Wash basin40mm dia. Bath, Sink, Washing Machine, Shower110mm dia. WC suite, Soil and vent pipe Item

Soil and Vent Pipes

c Soil and vent pipe to terminate a minimum of 900 mm above the nearest ventilation opening within 3000mm, and the bend at foot of SVP to have a radius of at least 200 mm at the centre line, and fitted with removable rodding access cover at base of stack.

SVP to terminate with a flexible pipe into a tile or ridge vent terminal to match the colour and profile of the roof covering, see drawing and 'Roofer' for details.

Soil stacks terminating within the building are to be fitted with one-way air admittance valve to finish above level of highest appliance.Generally all water cisterns to be provided with 19mm PVC-U overflow system to discharge outside the building in an obvious location. Overflow to internal WC cistern to discharge via tundish into WC sparge pipe.




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MECHANICAL INSTALLATION

Mechanical Services Installation Generally

a The contractor shall be responsible for the design of the installations which shall conform in all respects to relevant British Standards and Service Board regulations and shall include all necessary builder's works, and making good on completion. Item

b The works shall include for all labour and materials necessary to form complete mechanical services installations, and such adjustments, tests, fees and commissioning as may be required to give effective working installations, including connections to relocated mains services.All heating, hot and cold water copper pipework to conform to BS 2871 Pt 1, table X, capillary fittings (lead free) to BS 864 part 2 and stop cocks to BS 1010 complete with pinned jumper. Insulate all exposed pipework with thermal performance to BS 5422.

Item

c Design, supply and install an unvented hot water system to comply with Part G3 of Building Regulations and provide a British Board of Agrement Certificate for the unvented hot water system.Heating and hot water via, a gas fired boiler with a wet system of radiators and pipework, controlled by thermostatic radiator valves, boiler thermostat, timing controls, and boiler flow control to prevent unnecessary cycling.Hot water storage cylinder to be factory insulated with minimum 35mm thick coating of PU-foam to BS 1566 pt 1, and output temperature controlled by thermostat valve, and complete with vent pipe.All central heating and hot water pipes to be insulated within 1000mm of cylinder, in ducts and un-heated spaces as approved document part L.

Item

Heating Appliance

d Type of central heating boiler to have 'SEDBUK' efficiency rating of not less than; 86% for mains natural gas. 86% for LPG. 86% for oil (86% acceptable when calculated by SAP-98 method).Boiler to be complete with timing controls and control interlocks.

Balanced flue to oil fired boiler complete with external galvanised wire guard and to be minimum 300 mm from any ventilation opening. Connect to Oil Tank

Location: Utility Room. Boiler to be by Worcester Bosch Group or by Grant UK and have a minimum 7 year warranty

Item

MOUNT PLEASANT, SUTTON CHENEY MECHANICAL INSTALLATION


Unit £ p

MECHANICAL INSTALLATION continued ...

Central Heating:

a The Contractor shall be responsible for the design of the installation which shall conform in all respects to relevant Codes of Practice, British Standards and service board regulations as regards materials, engineering design and workmanship and shall include for all necessary builders works and making good.The system shall be designed to achieve an internal air temperature in all areas of not less than 21 deg C when the external air temperature is -3 deg C and where two air changes per hour are assumed. Item

b The works shall include for all labour and materials necessary to form the new heating installation and such upgrading, adjustments, tests, fees and commissioning as may be required to give an effective working installation including relocation and connections to mains services and boiler. Complete the design and install the systems to comply with BS 6700 and be free from leaks and water hammer. Item

c All new radiators are to be fitted with Thermostatic radiator valves on flow, and lockshield valve on return. All pipes and tanks in voids or roof spaces are to be insulated. All copper pipework to conform to BS 2871 pt 1 table X, capillary fittings (lead free) to BS 864 pt 2 and stop cocks to BS 1010 complete with pinned jumper.Hot water cylinder insulated all round and output temperature controlled by thermostat valve. Base heat loss calculations on the following (W/m²K):Roof: 0.16External walls: 0.25Windows: 1.50Ground floor: 0.20 Item

d Provide radiators to the following rooms:

All first floor areas and to include ladder type towel rail/radiator in Bathrooms and Showers

Item

Existing Heating and Hot And Cold Water System

e Allow for replacement of all existing heating and hot and cold water installations, including boilers, pipes, radiators, equipment, tanks and stagings. All work to central heating and hot water system, including size and type of components etc. are to be designed and installed by a specialist contractor, in accordance with BS 5449 for central heating for domestic purposes and shall be of the closed system type. All plumbing works to local water authority regulations with all statutory notices given and fees paid, prior to commencement of the works.




Unit £ p


Hot Water: Supply

a Read in conjunction with clause for Mechanical Services Installation: Generally. All hot water services to appliances to have servicing valves for temporary isolation and insulated in voids and floor spaces.

From hot water supply provide and install hot water service to the following appliances including all necessary fittings:

Location: All new appliances Item

Cold Water: Supply

b Read in conjunction with clause for Mechanical Services Installation: GenerallyInstruct local water board to provide a new water supply to the property, and pay all charges. Extend the service from the water board stop cock into the property in 19 mm Alkathene and terminate inside the building with stop cock and draw off tap, set minimum 750mm in from outside wall face. All installed strictly in accordance with the Water Board Regulations.All cold water services to appliances to have servicing valves for temporary isolation and insulated in voids and floor spaces. From mains water supply, provide and install cold water service to the following appliances:

Location: All new appliances, Include for External Taps to side and rear elevations, position to be agreed

Item



Unit £ p


Mechanical Ventilation And Extraction

Provide mechanical ventilation and extraction. Construct 100 mm dia flexible duct, supply and fix an Xpelair condensation control unit extract fan or equivalent complete with necessary ancillaries including external grille, and 13 amp max fused unswitched spur outlet. Positions to be agreed with the CA.Where mechanical extract ventilation is provided ensure an air inlet to the room via a 10 mm gap under the door or louvre grille.

a Location: To Kitchen Area provide mechanical ventilation extracting at a rate not less than 60 litres per second or 30 litres per second if a cooker hood is employed in the kitchen fittings.Bathrooms, En-suites and WCs to be mechanically ventilated at a rate of 15 litres per second, switched on with light and operate with a 15 minute overrun when light switched off.Utility Room mechanically ventilated at a rate of 30 litres per second switched on with light and operate with a 15 minute overrun when light switched off.Fans installed in Bath / Shower rooms in zone 1 or 2 as defined in the regulations are to be 12 volt safety extra low voltage fans (SELV)Zone 1 is area 2.25 mm from floor above the shower tray or bath.Zone 2 is area 600 mm from edge of bath / shower around all four sides and 2.25 mm from the floor.Zone 3 (outside 1 & 2) standard voltage may be installed, (but IPX4 splash-proof fans are recommended.

Item

Builders Work in Connection With Mechanical Installation

b Allow for any builder's work required in conjunction with the Mechanical Services installation.

Location: Generally: Note all pipework to be hidden, including chasing out plaster and walls and making good to match existing.

Item

Pipe Casings

c Provide and construct duct comprising of 32mm x 32mm softwood framing at 450 mm max centres, lined one side with 9 mm thick WBP plywood with removable access panel fixed with 'recessed' brass cups and screws.

Location: Generally to all exposed pipework and ductworkItem



Unit £ p

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ELECTRICAL INSTALLATION

Electrical Installation Generally

a The contractor shall be responsible for the design of the installations and shall include all necessary builder's works, and making good on completion and shall conform in all respects to the latest edition of the IEE wiring regulations for Electrical Installations BS 7671: 1992, The Electricity Supply Regulations, and Local Electricity Board's requirements. Item

b The whole of the electrical works shall be carried out by a contractor approved by the National Inspection Council for Electrical Installation Contracting (NICEIC) and who shall issue all installation and test certificates, and specific earthing declaration, to be handed to the employer on completion.

Item

c The work to also include smoke detection, emergency lighting, telephone and data installationsThe works shall include for all labour and materials necessary to form the installations and such adjustments tests, fees and commissioning as may be required to give an effective working installation, and shall include for all necessary builders works and making good.


Existing Electrical Installation

d Allow for replacement of the existing electrical installation and the new extension works.


Electric Consumer Unit

e Provide and fix a new consumer unit of the split load type with discrimination between 100 mA and 30 mA R:C:C:B: protection.

It shall be a flush mounted unit having an 80A 100mA residual current device as isolator with a minimum of 8 ways available for types 1 or 2 miniature circuit breakers. 5 of the ways shall be 100 mA protected and all ring socket circuits shall be 30 mA protected the unit shall be complete with type 1 MCB's as required or blanking plates for unused ways.

The consumer unit shall be mounted 1800 mm above FFL max or in a position where the owner has easy access to it while standing on the floor.

Location: Position to be agreedItem

MOUNT PLEASANT, SUTTON CHENEY ELECTRICAL INSTALLATION


Unit £ p

ELECTRICAL INSTALLATION continued ...

Electrics: Sub circuit: General

a The wiring of sub circuits shall be carried out using the looping in system ie all connections shall be made at accessory or consumer unit terminals. The use of connectors or junction boxes will not be permitted.

All wiring shall be concealed either by being run in roof voids, floor or ceiling spaces, or in plastered areas, by being sunk into the plaster and protected by channelling.

Wiring runs shall be vertical or horizontal, and in roof spaces shall be parallel to the walls and clipped to the sides of joists. Where it is necessary to pass through a joist, the joist shall be drilled at its neutral axis (centre line) at a point not more than 0.4 of the span nor less than 0.25 of the span and the hole size shall not exceed 0.25 of the depth of the joist.

Notching of joists for the passage of electric cables will not be accepted. Socket outlets shall be fed by ring circuits one each floor with both ends of each ring being connected to the same way in the consumer unit.


Electrical Accessories

Lighting. The installation of internal light fittings is to comply with Building Regulation clause L1.54 using energy efficient light fitting which will only take lamps having a luminous efficiency greater than 40 lumens per circuit-watt.

Generally unless stated otherwise accessories shall be of the flush pattern range from one of the following manufacturers. To be colour white with all wiring concealed.Approved manufacturers:- J A Crabtree & Co Ltd, MK Electric Ltd, Ashley Accessories Ltd, Tenby Electrical Ltd

The installation of internal light fittings is to comply with Building Regulation clause L1.54 using energy efficient light fitting which will only take lamps having a luminous efficiency greater than 40 lumens per circuit-watt

All power points to be located no lower than 450mm above finished floor level. All light switch plates to be located no higher than 1200mm above finished floor level

Immersion Heater

b Supply, install and connect a 3 kw immersion heater type suitable for location with a thermostat and 20 amp DP switch with neon light and marked "water heater" with heat resistant flex between heater and switch




Unit £ p


Smoke Detectors and Heat Detectors

a Provide and fix smoke and heat detectors as required by the 1991 Smoke Detector Act, minimum of one smoke alarm on each level or as indicated on drawing. To be mains type with battery back-up conforming to BS 5446 part 1 with separate circuit and where more than one, they are to be linked together.All to conform to BS5939 part 6 Design and Installation of Fire Detection and Alarm Systems in Dwellings.Smoke alarms should be sited so that there is a smoke alarm in the circulation space on all levels/storeys and within 7.5m of the door of every habitable room. If ceiling mounted they should 300mm from the wall or light fittings. Where the kitchen is not separated by a door from the staircase or circulation space there should be a linked heat detector fitted.


Electrical Schedule

Electrical Accessories positions required by Client shown on attached drawings. If no Client requirements are included within the documents the following minimum accessories to be provided

b Location : Include for all required work and accessories in the following schedule here.

See over for Key and Room Schedules Item



Unit £ p


Electrical Schedule continued ...

KEY

A Pendant lamp holder, comprising heat resistant short skirt lampholder, ceiling rose and heat resistant flexible cord.

B Batten lampholder with skirt.

C Wall switch, one or two way, gang as necessary, flush pattern standard plate, min 6 amp - amperage as required for usage.

D Ceiling switches, one or two way, minimum 6 amp amperage as required for usage.

E Socket Outlets, 13 amp, twin switched flush pattern, positioned 300 mm above FFL and worktops.

F Cooker Control Unit 45 amp with neon light, with cooker cable outlet complete with terminals, flush pattern.

G To new shower, run cable from separate fuse/circuit breaker to isolating DP ceiling pull switch with neon light, rated to suit electric shower unit.

H To fixed appliance, 13 amp max unswitched fused spur outlet.



Unit £ p


Electrical Schedule continued ...

i Bedrooms/Dressing Rooms: 2No A Pendant Lampholder 2 No C Wall switch 4 No E Socket outlets

ii Lounge/Dining Room/Study: 2 No A Pendant lampholder 2 No C Wall switch 4 No E Socket outlets

iii Kitchen/Utility 10 No Downlighters 2 No C Wall Switch 8 No E Socket outlets 1 No G Cooker control

iv Bathrooms 1 No B Batten lampholder 1 No D Ceiling switch 1 No H Spur outlet for extract fan

v Hall/Landing (per floor) 1 No A Pendant lampholder 1 No C Wall switch 2 No E Socket outlets (per floor)

a) Staircase lighting to have two way switching

vi Utility 1 No B Batten lampholder 1 No C Wall Switch 4 No E Socket outlets 1 No G Cooker controlvi

vii Shower Room/En Suite/Cloaks 1 No B Batten lampholder 1 No D Ceiling switch 1 No H Spur outlet for extract fan 1 No G Shower

viii External 5 No supply to external light



Unit £ p


Shower Unit

a Fix only electric showers as supplied complete with adjustable spray handset, slide bar, hose and soap dish, connect up to cold water and electric services. ( See Provisional Sums for supply)

Location As indicated on drawingsItem

Builders Work in Connection With Electrical Installation

b Allow for any required builders work in conjunction with the Electrical Services installation




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DRAINAGE

Below Ground Drainage

Design, excavate and lay new below ground drainage system in accordance with BS 8301 for Building drainage as indicated on drawings.Below ground drainage to be in-accordance with BSEN 752 for Building drainage, BS 8000 Workmanship on Building Sites Part 14 CP for below ground drainage and Building Regulations Section H1. Layout as shown on drawing and unless stated otherwise to be 100 mm diameter, flexible jointed drainage system on 100mm bed of granular material, all laid to manufacturers recommendations.Vitrified clay pipes and fittings to BS 65 & BSEN 295. PVCU pipes and fittings to BSEN 1401100 mm diameter foul drains laid to self-cleansing falls, at a gradient no flatter than 1:80 (1:40 preferred), or as indicated on the drawing.100 mm diameter surface water drains, laid at gradient no flatter than 1:100, or as indicated on drawing, with up-turned bend at base of rainwater downpipe.

a Drain pipes passing under building, to have minimum 300mm cover from the underside of the concrete slab, and 150mm minimum bed and surround of granular material and compacted backfill.

Location: Generally as required by the new above ground drainage and rainwater disposal system.

Item

Surface Water Discharge

b Surface water to discharge into existing surface water system, exact details of existing system to be ascertained after works have commenced on site, when existing drains have been exposed and details of new surface water drains will be submitted to BCO for approval. If suitable run surface water drain pipes to soakaway 1200mm² capacity unless stated otherwise, backfill with rubble, cover with polythene sheet and 300 mm layer of top soil

Location: Generally as required, minimum 5000mm from any building Item

Pipes penetrating walls

c Where drain pipe passes through wall, bridge over using reinforced concrete lintel, build in short length of pipe with flexible joint both sides within 150 mm of wall faces and connect pipe each side to rocker pipe having a maximum length of 600 mm before next flexible joint.

Where drain passes through concrete foundation provide sleeve around pipe to give 50 mm space all round drain pipe and mask both sides of sleeve with rigid sheet, ie 6 mm masterboard or similar.

Location: Generally as required Item

MOUNT PLEASANT, SUTTON CHENEY DRAINAGE


Unit £ p

DRAINAGE continued ...

Drainage: New Gullies

a Provide and construct new roddable trapped gullies, set in concrete, comprising of trap, plain square hopper and grating and connect into drain run (back inlet type, depending upon situation)

Connect soil and vent pipe to drain run via polypropylene adaptor into below ground drainage system with rest bend. From inside building form upturned drain pipe to floor level with polypropylene adaptor to receive waste pipe and run drain into foul water system

Location: Generally as requiredItem

Inspection Chambers/Manholes

b Provide and construct inspection chamber in location indicated, a polypropylene or equal approved having a 150 mm thick C20 concrete base, and sides of chamber backfilled with 100 mm width of compacted pea gravel. Unless specifically stated on the drawing, chambers can be of the following construction, to conform in all respects to Building Regulations, Relevant Standards and installed strictly in accordance with the manufacture's instructions, type suitable for location and loadings.

Size (also depends on number of branches)Depth 0.6 or less 190 mm diameterDepth 1.00 or less 450 mm dia, or 450 squareDepth 1200 to 1500mm, 1200 x 675mm or 1000mm circular (1200mm dia for sewer connection) Item

c Chambers complete with cover & frame to BS497, type & weight to suit location, chambers in driveways to be designed to withstand min 12.5 tonnes.Provide & fix galvanised step irons to chambers over 900 mm deep invert to BS 1247, position of steps as BS5911. Corbel cover with one straight side.Internal inspection chamber / gully covers to be double-seal, airtight, screw-down covers and frames to BS 497, with recessed cover to receive floor finish.Masonry; 215 mm Class B engineering brickwork in 1:3 cement : sand mortar, on 150 mm thick C20 concrete base.Pre-cast Concrete; Pre-cast concrete system to BS 5911 & BS 8301 complete with all accessories, bedding mortar or sealant.Plastic: Generally for inspection chamber up to 1000mm depth, to be minimum 450 mm diameter performed plastic chambers.

Location: Generally as shown on drawing Item



Unit £ p

DRAINAGE continued ...

Altering and Adapting Existing Foul and Surface Drainage Systems and Manholes

a The contractor is to include for investigating the line of the existing drains where affected by the new works, which are to be exposed and protected to the satisfaction of the Building Control Officer. Any redundant drains are to be sealed with a concrete plug.Alter and adapt existing drainage system and manholes as necessary to accommodate new pipework, maintaining existing flow at all times.

Location: Generally as required (Note Provisional Sum for possible pumping of drainage system included elsewhere)

Item

Testing Installations

b Test complete drainage installations by approved means on completion




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EXTERNAL WORKS

Make Good

a Make good all disturbed surfaces affected by the new works and working operations.

Location GenerallyItem

MOUNT PLEASANT, SUTTON CHENEY EXTERNAL WORKS


Unit £ p

Summary

PRELIMINARIES Page 18

PROVISIONAL SUMS Page 19

DAYWORKS Page 22

GENERALLY Page 26

DEMOLITION AND ALTERATION WORKS Page 37

SUBSTRUCTURE Page 43

STEELWORK - ISOLATED STRUCTURAL MEMBERS Page 44

ROOF Page 50

EXTERNAL WALLS Page 56

WINDOWS AND EXTERNAL DOORS Page 60

INTERNAL WALLS Page 63

INTERNAL DOORS Page 67

WALL FLOOR AND CEILING FINISHES Page 74

GENERAL FIXTURES/FURNISHINGS AND EQUIPMENT Page 75

SANITARY AND DISPOSAL INSTALLATIONS Page 78

MECHANICAL INSTALLATION Page 83

ELECTRICAL INSTALLATION Page 90

DRAINAGE Page 94

EXTERNAL WORKS Page 95

MOUNT PLEASANT, SUTTON CHENEY

Page 96 Total for Bill £

Unit £ p

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DEMOLITION AND ALTERATION WORKS GENERALLY Demolitionbonserbuildingcontractors.co.uk/wp-content/uploads/2015/02/... · DEMOLITION AND ALTERATION WORKS GENERALLY Demolition ... method