Celotex+Flat+Roof+Handy+Guide

We know insulation inside and out

TheCelotexFlat Roof Handy Guide

04 Energy conservation the rules06 Celotex we know insulation inside and out08 Product descriptions14 Insulation solutions for flat roofs

Warm flat roofs16 Built-up flat roofing applications

18 Single-ply membrane flat roofing applications

20 Flat roof insulating deck

22 Balconies and terraces

24 Ventilated lead covering

Cold flat roofs26 Insulation between joists

28 Insulation between and under joists

30 Commercial and industrial applications34 Environmental sustainability policy36 Notes

Contents

03

England and Wales Approved Document L1A (2006) new dwellingsElemental U-values indicative only

For regulation compliance, new dwellings must achieve a CO2 Target Emissions Rate (TER).This is unique to each dwelling design and iscalculated using Standard Assessment Procedure(SAP) 2005.

The TER is more easily achieved by specifyinghigh standards of fabric insulation, resulting inlow U-values.

The U-values shown indicate the standard ofinsulation required to meet typical dwelling TERsand are given for guidance purposes only.

England and Wales Approved Document L1B (2006) work in existing dwellingsElemental U-values

Under the new regulations existing dwellingsdo not have to meet a TER. Instead, they have tomeet so called elemental U-values which refersto target figures for individual floor, wall androof elements of the building.

These values are shown in the illustration to the right.

Scotland Domestic Technical Handbook Section 6: EnergyElemental U-values

Under the Scottish regulations dwellings do nothave to meet a target TER (unless requested bylocal authority). Instead they have to meet socalled elemental U-values which refers to targetfigures for individual floor, wall and roofelements of the building.

These values are shown in the illustration to the right.

Note: These values assume a minimum SEDBUKboiler efficiency of 78% and the total area ofdoors, windows and rooflights

Celotex we know insulation inside and out

When you specify Celotex insulation, you areaccessing an unrivalled product and servicepackage that has evolved through a process ofconstant innovation spanning eight decades.

The evolution continues with intensive productdevelopment across our highly specialisedCelotex product range.

Our newly expanded product range providesthermal insulation solutions that fully meet therequirements of current legislation as well as thedemands of building professionals, specifiers andusers.

These developments are represented in ourdepth of product offer. Celotex offers anunrivalled range of thicknesses from 12-200mm.

The pursuit of improved energy efficiency, thereduction of CO2 emissions and of course thedrive towards zero carbon will continue to driveour product and service developments.

In addition, exceeding the demands of ourcustomers, specifiers and trade partners will helpmaintain our position as the UK brand leadingprovider of PIR thermal insulation.

Why Celotex PIR thermal insulation?

As pioneers of PIR thermal insulation we continueto maintain a considerable advantage over ourcompetitors. This is best reflected in the sumtotal of our achievements in productperformance and in-depth knowledge ofmanufacturing techniques.

Our PIR insulation offers the following benefits:

low thermal conductivity minimising heat loss better thermal efficiency, per mm, thanmineral wool leading to thinner insulationsolutions

low emissivity (low-e) value due to our foilfacers further improving thermal efficiency

easy to handle easy to cut and shape for intricate details

most flexible and versatile insulation type andideally suited for floors, walls and pitched and flatroofs.

ideal when self-supporting insulation isrequired

can provide air and moisture barrier excellent fire performance properties meetingEuroclass D.

Coupled with our leading Technical ServicesAdvisory Centre, Celotex is your insulationspecialist of choice.

Flat roof range overview

Celotex offers a wide range of products suitablefor flat roofing applications.

Our relaunched Energy-Lok EL3 product ispurpose designed for built-up flat roofingapplications including hot-applied bituminousand mastic asphalt waterproofing systems andfully adhered single-ply membranes.

Our Tempchek TA3 range is specifically for usein mechanically fixed single-ply membraneswhereas our Tempchek Deck TD3000 productcan be used in flat roof insulating deckapplications as well as ventilated lead coveredwarm flat roofs.

Our Extra-R XR3000 and Tuff-R GA3000products are ideally suited for balcony andterrace constructions and ventilated lead coveredwarm flat roofs.

Commercial and industrialapplications

Within the commercial and industrial sector ourLPCB approved Double-R LG3 lining gradeproduct is the ideal solution in both under andover purlin applications.

Product descriptions, specification details as wellas example U-value calculations and installationguidelines can all be found within this guide.

Technical Service Advisory Centre

Staffed by experienced construction specialists,the Celotex Technical Service Advisory Centre hasearned an excellent reputation for itscomprehensive level of support. No otherinsulation board manufacturer can equal thelevel of personal assistance that our team offers.

In line with the requirements of ApprovedDocument L, we now offer a service to calculateStandard Assessment Procedure (SAP) ratings fordwellings and provide advice on any aspect ofproduct selection to ensure compliance with therelevant Building Regulations.

U-value calculations for all product applicationsare also available or it may be easier to visit usat www.celotex.co.uk where we offer a freeonline U-value facility.

For further information or to contact ourTechnical team, visit www.celotex.co.uk or call0901 996 0100*.

Our centre is now manned from 8am until5:15pm to provide the maximum coverage to thebuilding professional and specifier.

www.celotex.co.uk

In line with our position as brand leader we arecontinually looking to offer an ever improvingservice level. The pursuit towards zero carbon andother initiatives such as the Code for Sustainable

Homes will mean many of our programmes arenot reflected in this guide.

For the latest and most complete informationplease visit us at www.celotex.co.uk specifiersand customers alike.

Sustainability

Operating within the construction sector andspecialising in insulation products we are acutelyaware of the energy efficiency and carbonemission impact of our industry and ouractivities.

We are committed to ensuring the environmentalimpact of our operations, material specifications,waste management, packaging and thedistribution of our products is kept to aminimum. A reduction in our carbon outputremains an environmental goal.

Our accredited environmental profile achieves an A rating within the 2002 Green Guide toSpecification. Our environmental impact has alsobeen recently certified by the BRE. This offersfurther benefits to the specifier as well as helpingto achieve credits within BREEAM and The Codefor Sustainable Homes.

Investment in our products and services toensure that we achieve and indeed exceed theminimum performance requirements set out inlegislation remains a strategic objective of theCompany.

We continue to concentrate on energy efficiencyand reducing CO2 emissions. The use of Celotexwill help you achieve this.

06 07T: 0901 996 0100* www.celotex.co.uk

Celotex Tempchek Deck TD3000 provides aquick and easy way to achieve effective thermallyinsulated roof decks for building structures such assmall extensions or garage roofs where there will beonly occasional trafficking. These products feature a foilfaced insulation board, to give the best insulation valuepossible, bonded to a facing of 5.5mm WBP ply. Thisallows the user to install the roof structure in oneoperation since the product provides the deck,insulation and vapour control layer therebyconsiderably reducing installation times ahead ofweatherproofing.

Always install Celotex Tempchek Deck TD3000 inaccordance with the instructions supplied by CelotexLimited.

Standard board dimensions

1200mm x 2400mm (with grid markings to assistinstallation)

Physical properties

Thermal resistance (R) values for Celotex products aredeclared in accordance with BS EN 13165. These R-values equate to a Thermal Conductivity () value of0.023 W/mK (foam core).

Fire resistance (insulation only)

Reaction to fire in accordance with BS EN 13501 = ClassD/s2/d0 (except TD3106/TD3116/TD3126 = Euroclass F).Surface spread of flame in accordance with BS 476Part 7 = Class 1.

Celotex Extra-R XR3000 is new to the Celotexrange and is manufactured on our latest state-of-the-art restrained rise production line featuring our ownunique jointless laydown technology. This technologyenables us to offer thicker boards with no visible seamsin the foam core. This foil faced product is targeted atcut-to-fit applications for insulation between rafters orjoists and will enable users to achieve lower U-valueswith a single layer of insulation than has previously been possible. This will help designers meet thepresent and future requirements of ApprovedDocument L (2006) of the Building Regulations.

Always install Celotex Extra-R XR3000 in accordancewith the instructions supplied by Celotex Limited.



Physical properties

Thermal resistance (R) values for Celotex products aredeclared in accordance with BS EN 13165. These R-values equate to a Thermal Conductivity () value of0.023 W/mK.

Fire resistance

Reaction to fire = Euroclass F in accordance with BS EN13501.

Product descriptions

Celotex Energy-Lok EL3 is a purpose-designedinsulation board for use in built-up flat roofingapplications, including hot-applied bituminous andmastic asphalt waterproofing systems and fully adheredsingle-ply membranes.

Energy-Lok EL3 features a coated glass tissue facer,perforated on one side for use in bitumen-based built-up applications, whilst the reverse unperforated facer issuitable for fully adhered single-ply applications. Energy-Lok EL3 is available in two different lengthsand in a range of thicknesses allowing you to achieve U-values with minimum thickness.

Always install Celotex Energy-Lok EL3 in accordancewith the instructions supplied by Celotex Limited.


1200mm x 600mm and 2400mm

Physical properties

Thermal resistance (R) values for Celotex products aredeclared in accordance with BS EN 13165. These R-values equate to a Thermal Conductivity () value of:0.027W/mK for product thickness under 75mm0.026W/mK for product thickness between 80-110mm0.025W/mK for product thickness of 120mm or over.

Fire resistance

External roof exposure = Ext. FAB in accordance with BS 476-3. Reaction to fire = Euroclass F in accordance with BS EN 13501.

Celotex Tempchek TA3 is a purpose designedinsulation board for use with mechanically fixed andballasted single-ply weathering systems. It provides aquick and easy way to achieve effective thermalinsulation in flat roofing structures. These boards allfeature the unique jointless lay down system to improvethe flatness of the product.

Tempchek TA3 performs to a compressive strength of150kPa giving improved resistance to site traffic duringinstallation and comes available in thicknesses rangingfrom 50 150mm.

Always install Celotex Tempchek TA3 in accordancewith the instructions supplied by Celotex Limited.



Physical properties


Fire resistance

Surface spread of flame in accordance with BS 476Part 7 = Class 1.

XR3110 110 4.75XR3120 120 5.20XR3130 130 5.65XR3140 140 6.05XR3150 150 6.50XR3165 165 7.15XR3200 200 8.65

Product rangeProduct code Thickness (mm) R-value (m2K/W)


TD3076 70 + 5.5 3.05TD3081 75 + 5.5 3.30TD3086 80 + 5.5 3.50TD3096 90 + 5.5 3.95TD3106 100 + 5.5 4.35TD3116 110 + 5.5 4.80TD3126 120 + 5.5 5.25

Product rangeProduct code Thickness (mm) Combined

insulation + ply R-value (m2K/W)TA3/50 50 2.15TA3/70 70 3.00TA3/75 75 3.25TA3/85 85 3.65TA3/90 90 3.90

TA3/100 100 4.30TA3/110 110 4.75TA3/125 125 5.40TA3/150 150 6.50


EL3/50 50 1.85EL3/80 80 3.05EL3/90 90 3.45EL3/95 95 3.65

EL3/100 100 3.80EL3/110 110 4.20EL3/120 120 4.80EL3/140 140 5.60EL3/150 150 6.00


Product descriptions

Celotex Tuff-R GA3000 has long been at theheart of the Celotex product range, providing a rangeof thermal insulation solutions to the builder. TheCelotex Tuff-R GA3000 product is a foil faced thermalinsulation board which has core foam uniquelyreinforced with glassfibre (except GA3100). Theseproducts still feature the best reaction-to-fireperformance (Euroclass D/s2/d0) measured inaccordance with new European Standards of anysimilar product on the market.

Always install Celotex Tuff-R GA3000 in accordancewith the instructions supplied by Celotex Limited.



Physical properties


Fire resistance

Reaction to fire in accordance with BS EN 13501 = ClassD/s2/d0 (except 100mm = Euroclass F). Surface spread of flame in accordance with BS 476 Part 7 = Class 1.

Celotex T-Break TB3000 is a thin, foil facedinsulation board with unreinforced core foam (except35 - 45mm which contain glass fibre reinforcement)and thicknesses ranging from 12 to 45mm. The T-Break name stems from the design function of therange, which is to provide simple solutions toovercome localised thermal bridges. Celotex is uniquein being able to offer boards as thin as 12mm to themarket for this purpose.

Always install Celotex T-Break TB3000 in accordancewith the instructions supplied by Celotex Limited.


1200mm x 2400mm (with grid markings to assist installation)

Physical properties


Fire resistance

Reaction to fire = Euroclass F in accordance with BS EN13501.Surface spread of flame in accordance with BS 476 Part 7 = Class 1.


LG3/25 25 1.10LG3/30 30 1.35LG3/40 40 1.80LG3/50 50 2.25


TB3012 12 0.50TB3020 20 0.85TB3025 25 1.05TB3030 30 1.30TB3035 35 1.50TB3040 40 1.70TB3045 45 1.95


Celotex Double-R LG3 is a high performanceinsulation board for use in commercial, agricultural andindustrial buildings. It is offered with a white paintedstucco embossed foil face and approval from the LossPrevention Certification Board (LPCB).

Celotex Double-R LG3 achieves a class leadingreaction-to-fire performance of Euroclass B/s2/d0when measured in accordance with EuropeanStandards. As well as excellent dimensional stability,LG3 is lightweight, rapidly installed and provides asemi-decorative finish.

Always install Celotex Double-R LG3 in accordancewith the instructions supplied by Celotex Limited.


1200mm x 2400mm

Physical properties


Fire resistance

Reaction to fire in accordance with BS EN 13501 = ClassB/s2/d0. Surface spread of flame in accordance with BS 476 Part 6 & 7 = Class 0.

GA3050 50 2.15GA3055 55 2.35GA3060 60 2.60GA3065 65 2.80GA3070 70 3.00GA3075 75 3.25GA3080 80 3.45GA3090 90 3.90GA3100 100 4.30


Celotex insulation clip


Introduction

The Celotex insulation clip has been designed to enableinsulation boards to be installed between timber joists orrafters quickly and without the need for nails, screws orbattens. They provide a permanent way of securing theCelotex insulation with as little fuss as possible.

The clip should be used in situations where the insulation isbeing installed from above or below, for example whenfitting between joists in a suspended timber floor.

Using the clip ensures that the insulation will be held firmlyin place once installed in the correct manner.

Installation guidelines The joists should be installed in the conventional mannerin accordance with the Building Regulations.

Cut the Celotex insulation boards to the width of the spacebetween the joists or rafters ensuring a straight edge to theboard to enable a tight interference fit.

Push the insulation clips into the board at 1000mmintervals with the two prongs piercing the exposed foamdown the long edge of the board (see fig.1).

Start the clips in between the joists and push the boardinto place (see fig.2). This should be a tight fit to minimiseheat loss through gaps between the joist and insulationboard.

Push the board fully home so that the base of theinsulation clip is level with the face of the joist (see fig.3).

Where additional insulation or plasterboard is requiredbelow the joists, continue as in the Celotex literature for thatapplication (see fig.4).

If additional board security is required, for example wherethere is no lining below the joists or rafters, nail through the baseof the clip directly into the joist (see fig.5).

fig.1

fig.2

fig.3

fig.4

fig.5

Built-up flat roofing applicationsCelotex Energy-Lok EL3 is a purpose designedinsulation board for use in built-up flat roofingapplications, including hot-applied bituminousand mastic asphalt waterproofing systems and fully adhered single-ply membranes. Energy-Lok EL3 features a perforated facer foruse in bitumen-based built-up applicationswhilst the coated glass tissue reverse facer issuitable for fully adhered single-ply applications.

Single-ply flat roofing applicationsCelotex Tempchek TA3 is a purpose designedhigh performance polyisocyanurate foil facedinsulation board suitable for flat roofing systemsfor use with mechanically fixed single-plymembranes.

Celotex Tempchek TA3 boards are compatiblewith most mechanically fixed single-plyweathering systems i.e. synthetic polymer, PVCand EDPM.

Celotex Tempchek TA3 boards are ideal for fastconstruction schedules.

Flat roof insulating deckCelotex Tempchek Deck TD3000 is designed asa combined deck and insulation board for flatroofs, supported by timber joists. This creates awarm roof construction, eliminating the needfor insulation between the joists, and avoids thedifficulty of providing ventilation through theroof void. All flat roofs should be laid to falls toensure proper drainage without ponding. Withthe exception of fixing, the installation of awaterproofing system incorporating CelotexTempchek Deck TD3000 may be treated in thesame way as a normal plywood-decked roof.

Insulation solutions for flat roofs

Insulation between joistsDepending on age, many existing timber joistedflat roofs incorporate little or no insulation.However, they can be effectively upgraded tocurrent building regulation insulationrequirements without the need to remove theexisting weatherproofing covering. This isespecially relevant where buildings are beingrenovated or converted for new uses.

Celotex rigid PIR insulation board can beinstalled between joists in both existing and newconstructions. The position of the insulation willcreate a cold roof construction and a minimum50mm ventilated air space must be providedbetween the deck and the cold side of theinsulation in order to minimise the risk ofcondensation formation.

If the existing roof deck is not laid to falls and isprone to ponding, consideration must be givento replacing the deck.

Insulation between and under joistsDepending on age, many existing timber joistedflat roofs incorporate little or no insulation.However, they can be effectively upgraded tocurrent building regulation insulationrequirements without the need to remove theexisting weatherproofing covering. This isespecially relevant where buildings are beingrenovated or converted for new uses.

Celotex rigid PIR insulation board can beinstalled between and under joists in bothexisting and new constructions. The position ofthe insulation will create a cold roofconstruction and a minimum 50mm ventilatedair space must be provided between the deckand the cold side of the insulation in order tominimise the risk of condensation formation.

If the existing roof deck is not laid to falls and isprone to ponding, consideration must be givento replacing the deck.


When used on metal decks, Celotex Energy-Lok EL3

boards should be laid with the perforated facer uppermost

and the long sides at right angles to the corrugations and

bonded in a full mop of hot bitumen to the VCL. Torch-on

technique is suitable only when there is no direct contact

between the flame and the board. Energy-Lok EL3 is not

suitable for use with the standard torch-on technique.

Cold-applied systems

For single-ply membranes, the VCL should be either

polythene or reinforced aluminium foil. The VCL should

be loose-laid immediately prior to installation of the roof

board and detailed at edges and abutments as

previously described.

The VCL should be sealed and taped to the top surface of

the board.

Mechanical fastening

The boards should be laid, with all joints tightly butted

together, over the VCL and then mechanically secured

through to the deck. When used on metal decks, these

roof boards should be laid with the long sides at right

angles to the corrugations. When mechanical fasteners are

utilised, they should be selected to suit the type of deck

used. A plate washer with a surface area of not less than

45cm must be used with each fastener, with no less than

four fasteners used per board. Fasteners should be

installed between 50150mm from the edges and corners

of the board.

Installation of weathering systems

Different types of weathering systems require different

installation instructions and guidelines. Advice on the

installation of these weathering systems should be

sought from the manufacturer or provider of the

weathering system type.

Laying pattern

It is recommended that boards are laid with joints

break-bonded.

Supporting deck

The supporting deck must provide adequate support for

the VCL and insulation board with joints being

supported by the ridges of the deck. It must be capable

of supporting the static and dynamic design loads and

the loads associated with the construction activity

without deflection in excess of the limits defined in BS

6399:Part1. The deck must be structurally sound, dry,

clean and where necessary, primed before application of

the weathering and insulating system.

Trafficking

Boards are capable of withstanding the trafficking

associated with normal roof laying work. However, roofs

are generally designed for only occasional lightweight

foot traffic or maintenance access. Where more frequent

or heavier access is required, protected walkways should

be provided. Under no circumstances should the roof be

used as a working platform, either during or after the

construction programme. Extra care should be taken to

protect the insulation and weathering when ballasting.

Use of adhesives

When using adhesives, the installer should take care not

to use products that contain chemicals likely to attack

the insulating foam such as ketonic solvents.

Energy-Lok EL3 contains no chemicals or solvents likely

to damage the PVC membrane. When using adhesives,

the installer should check the compatibility of the

adhesive with the adhesive manufacturer.

Built-up flat roofing applications


Warm Flat Roof EL3 Concrete Concrete Steel Steel Timber Timber Deck Deck Deck Deck Deck DeckFully Mechanically Fully Mechanically Fully Mechanically

Bonded Fixed Bonded Fixed Bonded Fixed Thickness Thickness Thickness Thickness Thickness Thickness

mm mm mm mm mm mmOutside surface - - - - - - Weather-proofing system - - - - - -Variable Layer See below See below See below See below See below See belowVapour control layer - - - - - - Concrete deck 250 250 n/a n/a n/a n/aSteel deck n/a n/a 1.5 1.5 n/a n/aTimber deck plywood n/a n/a n/a n/a 19 19Cavity between joist @ 11.7% Bridging n/a n/a n/a n/a 150 150Gyproc board n/a n/a n/a n/a 12.5 12.5Inside surface - - - - - -

Celotex Thickness U-value U-value U-value U-value U-value U-value Product mm W/mK W/mK W/mK W/mK W/mK W/mK

EL3/150 150 0.16 0.18 0.16 0.19 0.15 0.19EL3/140 140 0.17 0.19 0.17 0.20 0.16 0.20EL3/120 120 0.20 0.22 0.20 0.23 0.19 0.22EL3/110 110 0.22 0.25 0.23 0.25 0.21 0.24EL3/100 100 0.24 0.27 0.25 0.28 0.23 0.26EL3/95 95 0.25 0.28 0.26 0.29 0.24 0.27EL3/90 90 0.27 0.29 0.28 0.30 0.25 0.28EL3/80 80 0.30 0.32 0.31 0.33 0.28 0.31EL3/50 50 0.47 0.49 0.50 0.52 0.42 0.45

Example U-value calculation: EL3 - Built-up roofing

Use Celotex Energy-Lok EL3 high performanceinsulation in built-up flat roofing applications,including hot-applied bituminous and mastic asphaltwaterproofing systems and fully adhered single-plymembranes. The perforated facer is suitable forbonding in mastic asphalt applications and hotapplied bituminous built-up roofing systems .The unperforated reverse facer is suitable for single-ply, fully adhered roof systems, self-adhesivemembranes and liquid-applied membranes.

When designing a flat roof using Celotex Energy-Lok EL3 boards, three basic principles apply:

1. Design to a fall of 1:80, 1:60 or 1:40 as appropriate tothe weathering system, type of deck and constructiontolerances.

2.Have due regard for the use and design of thebuilding and the need to ensure that the designwill not allow a build up of moisture below the

waterproofing membrane.

3. Provide adequate protection for both insulationand waterproofing if significant foot traffic is expectedeither during or after the completion of the roof.

Installation guidelinesHot-applied systems

The felt vapour control layer (VCL) in accordance with

BS 6229 should be fully sealed at all laps prior to applying

the insulation. At perimeters and abutments the VCL

should be turned up around the insulation board edges

and a flap of approximately 300mm should be bonded

to the top surface of the insulation board. The VCL should

be fully bonded to concrete decks using hot bitumen

adhesive, strip-bonded to the ribs of metal decks and

partially bonded to timber decks. On timber decks the

VCL may be nailed to the deck, but laps should be sealed

with the appropriate adhesive.

Celotex Energy-Lok EL3over concrete deck -

perforated facer uppermost

Celotex Energy-Lok EL3over timber deck -

perforated facer uppermost

Variable Layer

Single-ply membrane flat roofing applications

Use Celotex Tempchek TA3 high performanceinsulation in mechanically fixed, single-ply flat roofingsystems where the higher compressive strength ofthe board gives improved resistance to site trafficduring installation.

When designing a flat roof using Celotex TempchekTA3 boards, three basic principles apply:

1. Design to a fall of 1:80, 1:60 or 1:40 as appropriate tothe weathering system, type of deck and constructiontolerances.

2. Have due regard for the use and design of thebuilding and the need to ensure that the design willnot allow a build up of moisture below thewaterproofing membrane.

3. Provide adequate protection for both insulationand waterproofing if significant foot traffic isexpected either during or after the completion of theroof.

Installation guidelinesLaying pattern

It is recommended that Celotex Tempchek TA3

boards are laid with joints break-bonded. When used

on metal decks, the Celotex Tempchek TA3 boards

should be laid with the long sides at right angles to the

corrugations.

Single-ply systems

Different types of weathering system require different

installation instructions and guidelines. Advice on the

installation of these weathering systems should be

sought from the manufacturer or provider of the

weathering system type.

Mechanical fastening

Except where the roof system is to be retained by ballast,

the insulation board must be mechanically fixed to the

deck. The Celotex TempchekTA3 board should be laid

with all joints tightly butted over the vapour control layer

(VCL) and then mechanically secured through to the deck.

The standard board size of 2400 x 1200mm is the

optimum size suitable for the mechanical attachment.

When used on metal decks, joints parallel to the deck

corrugations should be positioned over the crown of the

profile not over the trough. To satisfy this requirement,

non-standard board lengths are available to special order.

It is important that the securing of the Celotex

Tempchek TA3 insulation be considered independently

of the waterproofing system and only where positioning

of membrane fasteners coincides with the insulation

fasteners can the latter be omitted. Fasteners should be

laid out with a minimum of 11 fixings per 1200 x

2400mm board. An average of 5 fixings per square metre

is required for smaller boards.

Fasteners should be installed between 50-150mm from

the edge and corners of the board. Suitable fasteners

should comprise a screw type suitable for the deck into

which it is to be driven, combined with a circular or

rectangular plate washer having a surface area of not less

than 45cm.

Trafficking

Celotex Tempchek TA3 boards are capable of

withstanding the trafficking associated with normal

roof-laying work. However, flat roofs are generally only

designed for occasional lightweight foot traffic for

maintenance access. Where more frequent or heavier

access is required, protected walkways should be

provided. Under no circumstances should the roof be

used as a working platform, either during or after the

construction programme. Extra care should be taken to

protect the insulation and weathering when ballasting.

Vapour control layer (VCL)

The VCL should be minimum 1000 gauge polythene or

reinforced aluminium foil. This should be fully sealed at all

laps, prior to applying the insulation, using self-adhesive

tape appropriate to the type of VCL used.

At perimeters and abutments, the VCL should be turned

up around the insulation board edges and a flap of

approximately 300mm should be sealed and taped to

the top face of the board. The VCL should be loose laid

immediately prior to the installation of the roof insulation

board.

Supporting deck

The supporting deck must provide adequate support for

the VCL and insulation board, with joints supported by

the ridges of the deck. The deck must be structurally

sound, dry, clean and, where necessary, primed before

application of the weathering and insulating system.


Warm Flat Roof TA3 Concrete Concrete Steel Steel Timber Timber Deck Deck Deck Deck Deck Deck

Mechanically Thermally Mechanically Thermally Mechanically Thermally Fixed broken Fixed broken Fixed broken

Thickness Thickness Thickness Thickness Thickness Thicknessmm mm mm mm mm mm

Outside surface - - - - - - Single-ply membrane 1.5 1.5 1.5 1.5 1.5 1.5Variable Layer See below See below See below See below See below See belowPolythene vapour control layer - - - - - - Concrete deck 250 250 n/a n/a n/a n/aSteel deck n/a n/a 1.5 1.5 n/a n/aTimber deck plywood n/a n/a n/a n/a 19 19Cavity between joist @ 11.7% Bridging n/a n/a n/a n/a 150 150Gyproc board n/a n/a n/a n/a 12.5 12.5Inside surface - - - - - -

Celotex Thickness U-value U-value U-value U-value U-value U-value Product mm W/mK W/mK W/mK W/mK W/mK W/mKTA3/150 150 0.17 0.15 0.17 0.15 0.17 0.14TA3/125 125 0.20 0.17 0.20 0.18 0.19 0.17TA3/110 110 0.22 0.20 0.23 0.20 0.21 0.19TA3/100 100 0.24 0.22 0.25 0.22 0.23 0.20TA3/90 90 0.26 0.24 0.27 0.25 0.25 0.22TA3/85 85 0.28 0.25 0.29 0.26 0.26 0.24TA3/75 75 0.31 0.28 0.32 0.29 0.29 0.26TA3/70 70 0.32 0.30 0.34 0.31 0.30 0.28TA3/50 50 0.43 0.40 0.46 0.43 0.39 0.37

Example U-value calculation: TA3 - Single-ply membrane

Celotex Tempchek TA3over concrete deck

Celotex Tempchek TA3over metal deck

Celotex Tempchek TA3over timber deck

Variable Layer


Ensure that joist spacing is at no more than 600mmcentres and that the dimension of the joist is sufficient tospan and accept additional loads. If asphalt weathering isto be used, joists should be at no more than 400mmcentres.

Install the insulation boards, ensuring that the longedges are parallel to the line of the joists. 50mm x 50mmcross noggings should be inserted between joists tosupport the short edges of the boards.

Where boards butt together, bed onto twin beads ofvapour sealant wide enough to accommodate thisarrangement. This completes the vapour control layer(VCL) when combined with each boards foil facings.

Lay the boards with the plywood side uppermost andstagger board joints. Leave a gap of approximately 2mmbetween boards and ensure a minimum 20mm bearingon joists and noggings.

Fix Celotex Tempchek Deck TD3000 with corrosion-proof Suretwist Composite Panel helical fasteners at afrequency to suit the design wind load. Refer to BS 6399-2 Code of Practice for Wind Loads. As a guide, 16fasteners per board will resist a wind load of 2.22 KN/m2

based on a design load of 0.4 KN per fastener.

Ensure that fixings are no less than 10mm in from theboard edge or 50mm from each corner. They should beequally spaced along the supporting joists. Fixingsshould be long enough to penetrate at least 38mm intothe supporting timber.

Stagger opposing fixings where two board edgesshare the same joist or noggin.

Provide a complete insulation envelope by extendingthe wall insulation board up to the underside of the roofdeck.

Provide a soffit or ceiling below the joists, as thesurface of the product is not designed to be used as adecorative internal finish.

Ensure that the plywood is completely dry before anyweathering system is applied.

Always use a Type 3G felt to BS 747 as a vapourdiffusion first layer when using BUR weathering systems.When using a single-ply membrane, additional 12mmplywood has to be applied on top of the CelotexTempchek Deck TD3000.

Temporary protection must be provided for both theinsulation and the waterproofing, if significant foot trafficis anticipated either during or after installation.

Falls

The structure should be designed so that the finishedroof has a continuous, smooth and even slope towardsthe rainwater outlet or gutter. The minimum fall shouldbe 1:80 to avoid ponding water.

Deck stability

Celotex Tempchek Deck TD3000 incorporatesexterior grade WBP plywood to BS 1203, laminated tothe surface. This gives the product excellent strength.Boards can span up to 600mm joist centres to providea suitable substrate for a variety of weatheringsystems.

Vapour control layer

Celotex Tempchek Deck TD3000 has a built-in VCLdue to the foil facers but this is discontinuous at theboard joints. In some applications no further attentionto moisture control may be necessary. Celotex wouldgenerally recommend the application of a vapoursealant between the tops of the boards at all edges.This is essential in areas of potentially high humidity.

Installation guidelines

Example U-value calculation: Tempchek Deck

Flat roof insulating deck

Use Celotex Tempchek Deck TD3000 to combinehigh performance thermal insulation with 5.5mmWBP ply for use in flat roof deck applicationsto minimise insulation thickness andgive the following benefits:

Three-in-one product to providedeck, vapour control layer (VCL) andinsulation

Provides reliable long term energysavings for buildings

Ideal for use in occasionally trafficked applications Warm roof construction due to over joist installation Rapidly installed and weatherproofed Accepts a wide variety of weathering systems

Warm Flat Roof Tempchek Deck - TD3000 - BUR Tempchek Deck - TD3000 - SPMThickness mm Thickness mm

Outside surface - - Built-up roofing or single-ply membrane 12 1.5 [see note]Plywood n/a 12Variable Layer See below See belowCavity between joist @ 400 Ctrs -11.7% 150 150Plasterboard 12.5 12.5Inside surface - -

Variable Layer

Celotex Thickness U-value U-value Product mm W/mK W/mKTD3126 126 0.18 0.18TD3116 116 0.20 0.20TD3106 106 0.21 0.21TD3096 96 0.23 0.23TD3086 86 0.25 0.25TD3081 81 0.26 0.26TD3076 76 0.28 0.28

TD = Celotex Tempchek DeckBUR = Built-up roofingSPM = Single-ply membrane

Note: Prior to weatherproofing the roof, check with the single-ply membrane manufacturer that the proposed weatheringsystem is suitable for use with this type of construction.


Balconies and terraces

Use Celotex Extra-R XR3000 or Celotex Tuff-R GA3000 high performance thermal insulationbetween 19mm plywood sheeting for use in warmflat roof deck balcony applications to minimiseinsulation thickness and give the followingbenefits:

Warm roof construction due to over joistinstallation

Provides reliable long term energy savings forbuildings

Eliminates the need to insulate between joists Ventilation not required through roof void Robust deck structure copes with regular foottraffic

Rapidly installed and weatherproofed

Ensure the joist spacing is at no more than 600mmcentres and that the dimension of the joist is sufficient tospan and accept additional loads. If asphalt weathering isto be used, joists should be at no more than 400mmcentres. Install firrings to give a fall of 1:80, or asappropriate to type of construction tolerance.

Install 19mm plywood to top of joists/firrings and fit1000g polythene vapour control layer (VCL).

Install Celotex insulation to the required thickness andinstall secondary layer of 19mm plywood.

Fix with corrosion-proof wood screws at a frequencyto suit the design wind load. Refer to BS 6399-2 Code ofPractice for Wind Loads. As a guide, 16 fasteners per boardwill resist a wind load of 2.22 KN/m based on a designload of 0.4 KN per fastener.

Ensure that fixings are no less than 10mm in from theboard edge or 50mm from each corner. They should beequally spaced along the supporting joists. Fixings shouldbe long enough to penetrate at least 38mm into thesupporting timber.

Stagger opposing fixings where two board edgesshare the same joist.

Provide a complete insulation envelope by extendingthe wall insulation board up to the underside of the roofdeck.

Provide a soffit or ceiling below the joists, as thesurface of the product is not designed to be used as adecorative internal finish.

Ensure that the plywood is completely dry before anyweathering system is applied.

Built-up roofing (BUR). Always use a Type 3G felt toBS 747 as a vapour diffusion first layer when using BURweathering systems.

Single-ply membrane (SPM). Please consult themanufacturer or supplier or the relevant trade associationfor installation guidelines on all SPM weathering systems.

Temporary protection must be provided for both theinsulation and the waterproofing, if significant foot trafficis anticipated either during or after installation.

Before commencement of works, consult with astructural engineer to ensure that the whole structure isadequate to take the additional loads of a balcony.

The chosen weatherproofing system should then beapplied directly to the surface of the plywood andprotected from foot traffic with promenade tiles, deckingor a similar finish.

Warm Flat Roof Terrace BUR Terrace SPM Terrace BUR EX- JThickness mm Thickness mm Thickness mm

Outside surface - - - Built-up roofing or single-ply membrane 12 1.5 12Plywood 19 19 19Variable Layer See below See below See belowVapour control layer - - - Plywood 19 19 19Cavity between joist @ 400 Ctrs -11.7% 150 150 n/aPlasterboard 12.5 12.5 n/aPlasterboard between joist - 11.7% n/a n/a 12.5Inside surface - - -

Variable Layer

Celotex Thickness U-value U-value U-value Product mm W/mK W/mK W/mKXR3200 200 0.13 0.13 0.13XR3165 165 0.15 0.15 0.15XR3150 150 0.16 0.16 0.16XR3140 140 0.17 0.17 0.17XR3130 130 0.18 0.18 0.18XR3120 120 0.19 0.19 0.19XR3110 110 0.20 0.20 0.21GA3100 100 0.22 0.22 0.23GA3090 90 0.24 0.24 0.25

GA = Celotex Tuff-R GA3000 Terrace BUR = Built-up roofingXR = Celotex Extra-R XR3000 Terrace SPM = Single-ply membrane

Terrace BUR EX- J = Built-up roofing exposed joists

Example U-value calculation: Flat roof insulating deck - Balcony

Installation guidelines Additional installation guidelinesfor balconies


Ventilated lead covering

Installation guidelines (usingTempchek Deck TD3000) For installation of Tempchek Deck TD3000, pleaserefer to page 21 (bullet points 1-9 only) and thencontinue as below.

Ventilation should be provided to reduce the risk ofcondensation. Lay 50mm x 50mm counter battens to thetop of the Celotex Tempchek Deck TD3000, allow25mm continuous gap at opposite sides of the roof toallow free flow ventilation beneath the lead deck.Ventilation is in accordance with the Lead SheetAssociations recommendations.

Lay 12mm plywood on the top of the counterbattens and screw fix into place.

Lay underlay on the plywood using either a polyestergeotextile felt 200 to 220g/m or building paper toBS1521 Class A

Install lead sheet in accordance with the Lead SheetAssociations recommendations.

Deck stability (Tempchek DeckApplication Only)

Celotex Tempchek Deck TD3000 incorporates exteriorgrade WBP plywood to BS 1203, laminated to the surface.This gives the product excellent strength. Boards canspan up to 600mm joist centres to provide a suitablesubstrate for a variety of weathering systems.

Installation guidelines (usingCelotex Extra-R XR3000 orCelotex Tuff-R GA3000) Ensure that joist spacing is at no more than 600mmcentres and that the dimension of the joist is sufficient tospan and accept additional loads. Install firrings to give afall of 1:80, or as appropriate to type of constructiontolerance.

Install 19mm plywood to the top of joists/firrings andlay 1000g polythene vapour control layer (VCL) over theply. Install Celotex insulation to the required thickness.

Ventilation should be provided to reduce the risk ofcondensation. Lay 50mm x 50mm counter battens to thetop of the Celotex insulation, allow 25mm continuousgap at opposite sides of the roof to allow free flowventilation beneath the lead deck. Ventilation is inaccordance with the Lead Sheet Associationsrecommendations.

Fix with corrosion-proof wood screws at a frequencyto suit the design wind load. Refer to BS 6399-2 Code of

Practice for Wind Loads. As a guide, 16 fasteners perboard will resist a wind load of 2.22KN/m based on adesign load of 0.4KN per fastener.

Lay 12mm plywood on the top of the counterbattens and screw fix into place.

Lay underlay on the plywood using either a polyestergeotextile felt 200 to 220g/m or building paper toBS1521 Class A.

Install lead sheet in accordance with the Lead SheetAssociations recommendations.

Ventilated lead covered

flat roof using Celotex

Tempchek Deck TD3000

Warm Flat Roof Tempchek Deck Insulated DeckThickness mm Thickness mm

Outside surface - - Code 5 lead 2.2 2.2Plywood 12 12Ventilated cavity between battens/firrings 50 50Variable Layer See below See belowPolythene vapour control layer n/a Plywood n/a 19Cavity between joist @ 400 Ctrs -11.7% 150 150Plasterboard 12.5 12.5Inside surface - -

Variable Layer

Celotex Thickness U-value Celotex Thickness U-valueProduct mm W/mK Product mm W/mKTD3126 126 0.19 XR3200 200 0.14TD3116 116 0.20 XR3165 165 0.16TD3106 106 0.22 XR3150 150 0.17TD3096 96 0.24 XR3140 140 0.18TD3086 86 0.26 XR3130 130 0.19TD3081 81 0.27 XR3120 120 0.20TD3076 76 0.28 XR3110 110 0.22

GA3100 100 0.23GA3090 90 0.25

GA = Celotex Tuff-R GA3000 XR = Celotex Extra-R XR3000 TD = Celotex Tempchek Deck - TD3000

Example U-value calculation: Warm flat roof - Ventilated lead cover

Use Celotex Tempchek Deck TD3000, Celotex Extra-R XR3000 or Celotex Tuff-R GA3000 in ventilated, lead covered, warm roof applications to minimise insulation thickness and give the following benefits:

Celotex Tempchek Deck TD3000 provides deck, vapour control layer and insulation as a three-in-one product

Celotex Extra-R XR3000 provides the thickest insulationavailable in the market allowing even lower U-values to beachieved

Provides reliable long-term energy savings for buildings Ideal for use in occasionally trafficked applications Warm roof construction due to over joist installation Rapidly installed and weatherproofed

Ventilated lead covered

flat roof using Celotex Extra-R XR3000


Make sure that there is enough joist depth toaccommodate not only the thickness of the Celotexinsulation, but also a 50mm ventilated airspace abovethe boards.

Fix battens to the inside face of the joists so that thebottom of the batten is 50mm below the decking.

Measure the space to be filled between the insideface of the joists prior to cutting the board.

The patented Celotex insulation clip is designed toallow insulation boards to be installed between timberjoists quickly and without nails or screws.

Fit the clips at one metre maximum centres alongthe edge of the insulation (as described on page 12).

Push the boards into the void between the joistsuntil they are tight up to the underside of the stopbattens, ensuring the lateral joints are tightly butted.

A vapour control layer (VCL) should be installed tothe underside of the joists. For high humidity areassuch as kitchens and bathrooms, a polythene sheet ofhigher vapour resistance is recommended.

Complete the internal finish with plasterboard orother suitable sheet material screwed or nailed to thejoists.

When updating an existing ceiling, the Celotexinsulation can be fitted directly underneath the ceiling,providing there is no vapour check layer present suchas gloss paint or foil backed plasterboard.

Always ensure that there is a 50mm minimumventilation gap above any original insulation.

Ventilation must be provided above an insulatedceiling directly though the cold void.

Failure to do so could result in serious condensationproblems that may lead to decay and possible failure.

Installation guidelinesUse Celotex Extra-R XR3000 or Celotex Tuff-RGA3000 high performance thermal insulation in flatroof between joist applications to minimiseinsulation thickness and give the followingbenefits:

Optional single-layer insulationreduces cutting


Easy installation to use in existing roofs with noloss of internal headroom

No need to remove existing weatherproof covering Ideal for renovation/conversion projects Ventilated cold roof construction

Construction Thicknessmm

Outside surface resistance -Weather-proofing system -Plywood 19Ventilated cavity 50Variable Layer see belowPolythene, 1000 gauge VCL -Plasterboard 12.5Inside surface resistance -

Variable Layers Thickness U-value mm W/m2K

Celotex Extra-R XR3165 between joists @ 400 ctrs - 11.7%brg 165 0.20




Example U-value calculation: Cold flat roof - In between joists

Insulation between joists

Use a combination of Celotex Extra-R XR3000, CelotexTuff-R GA3000 and Celotex T-Break TB3000high performance thermal insulation in flat roofbetween and under joist applications tominimise insulation thickness and givethe following benefits:

A perfect solution to upgrade olderbuildings


No need to remove existing weatherproof covering Ventilated cold roof construction The ideal renovation/conversion solution Easy to minimise any loss of internal headroom


Insulation between and under joists

Make sure that there is enough joist depth toaccommodate not only the thickness of the Celotexinsulation, but also a 50mm ventilated airspace abovethe boards.

Fix battens to the inside face of the joists so that thebottom of the batten is 50mm below the decking.

Measure the space to be filled between the insideface of the joists prior to cutting the board.

The patented Celotex insulation clip is designed toallow insulation boards to be installed between timberjoists quickly and without nails or screws.

Fit the clips at one metre maximum centres alongthe edge of the insulation (as described on page 12).

Push the boards into the void between the joistsuntil they are tight up to the underside of the stopbattens, ensuring the lateral joints are tightly butted.

Secure the second layer of Celotex insulation to theunder-side of the joists with broad-headed clout nails.

Joints between boards must be tightly butted andsealed with a self-adhesive aluminium foil tape tocreate a vapour seal.

Clearly mark rafter-lines on the board face, using aspirit based felt-tip marker.

Nail or screw plasterboard or other lining throughthe insulation to the joist.

Composite systems can be used to combine Celotexinsulation under joist lining with a quilt type insulantbetween the joists which will provide acoustic, as wellas thermal insulation.

This option is particularly useful when upgrading tomodern acoustic insulation standards.

When updating an existing ceiling, the Celotexinsulation can be fitted directly underneath the ceiling,providing there is no vapour check layer present suchas gloss paint or foil backed plasterboard.

Always ensure that there is a 50mm minimumventilation gap above any original insulation.

Ventilation must be provided above an insulatedceiling directly though the cold void.

Failure to do so could result in serious condensationproblems that may lead to decay and possible failure.


Cold Industrial Roof

Outside surfaceWeather-proofing systemPlywoodVentilated cavityCelotex between joists @ 400 Ctrs - 11.7%brgVariable Layer [ for below joist ]Low E cavity batten air space - 11.7%brgVapour control layerPlasterboardInside surface

125mm deep joist 150mm deep joist 175mm deep joistThickness Thickness Thickness

mm mm mm- - -

n/a n/a n/a19 19 1950 50 50

GA3075 GA3100 XR3120See below See below See below

See Note 1 25 25 25- - -

12.5 12.5 12.5- - -

Variable Layer

Celotex Thickness U-value Thickness U-value Thickness U-valueProduct mm W/mK mm W/mK mm W/mKGA3050 50 0.19 50 0.16 50 0.15TB3045 45 0.21 45 0.18 45 0.17TB3040 40 0.23 40 0.19 40 0.17TB3035 35 0.24 35 0.20 35 0.18TB3030 30 0.25 30 0.21 30 0.19TB3025 25 n/a 25 0.22 25 0.20TB3020 20 n/a 20 0.23 20 0.21TB3012 12 n/a 12 n/a 12 0.22

TB = Celotex T-Break TB3000GA = Celotex Tuff-R GA3000XR = Celotex Extra-R XR3000Low E = Low emissivity

Note 1This thickness of board is required to be fixed using 25mm x 47mm battens to allow a suitable construction detail

Example U-value calculation: Cold flat roof - In between and under joists


Commercial and industrial applications Over purlin construction

Use Celotex Double-R LG3 insulating lining board in commercial,agricultural and industrial roofing applications. Offered with a white painted stucco embossed foil face, Celotex Double-R LG3 gives thefollowing benefits:

Approval from the Loss Prevention Certification Board (LPCB)

A Euroclass B fire rating Fully approved by fire insurers for use oncommercial and industrial buildings

Provides a semi-decorative internal finish For use in both under purlin and over purlin constructions Lightweight, rapidly installed and easily cut to shape

Design considerations

Industrial buildings generally need to be insulated, evenwhen only used for storage. To be effective, the insulationmust be efficient, lightweight and safe in a fire situation.Most insulation materials come in quilt form and are notself-supporting. Therefore they normally require supportfrom a steel liner tray. Celotex Double-R LG3 liningsheets, however, are self-supporting and do not require aliner tray.

Fasteners

The roof sheeting must be secured to the purlins usingself-spacing screw fasteners. Fastener spacings should bedetermined in accordance with the recommendations ofthe cladding and fastener manufacturers. The use ofordinary self-tapping screws is not recommended.


Each board should be supported by three purlins and bya galvanized steel tee section along both edges to give amaximum span of 2400mm and a standard width of1200mm. Mineral wool is loosely laid above the LG3 toachieve required U-value.

The external cladding sheets should be laid directly ontothe top surface of the mineral wool and fixed with self-spacing screw fasteners in accordance with themanufacturers recommendations. This applies to allcladding sheets except fibre cement. In this case, treatedtimber or fibre cement battens should be laid over theCelotex Double-R boards. When using battens, alwaysleave regular gaps to allow condensation or wind-drivenmoisture to drain to the eaves.

In all cases, the cladding should be installed in accordancewith the manufacturers recommended side and end lapdetails to ensure full weather protection. It is alsoimportant to ensure that the cladding is sealed off at bothridges and eaves, in accordance with the manufacturersrecommendations, whilst allowing free drainage of anycondensation at the eaves.

Vapour sealing/air-tightness

Bed all board edges in a vapour-resistant sealant, appliedto the table of the tee bars and to the top surface beforethe boards are set in position. All longitudinal and lateraljoints must be vapour-sealed, using self-adhesivealuminium foil. Celotex recommends tapes with acrylicadhesives, which have been shown to give excellentadhesion to the foil facings of the boards. The surface of

the Celotex Double-R LG3 board must be clean and freefrom dirt, grit and grease before any tape is applied.Application of vapour control adhesive tape will contributefurther to energy conservation by eliminating air leakagelosses at joints.

Rooflights

Where rooflights are required, the lining boards directlybeneath the external rooflights should be replaced withvacuum formed box-type translucent panels. Theseshould be sealed into the grid, by the same method asthe insulation boards, to maintain the integrity of thevapour seal.

Ridge detailing

A simple arrangement at the ridge is to use a shortlength of board to span between the uppermost purlinson either side of the ridge, with the exposed edgessupported by tee bars. All joints must be fully sealed asdescribed above.

Gutters

The insulation board should be installed to sail over thelowest purlin. The exposed cut edge should be taped. Thecladding sheet must project beyond the end of the liningboard by a minimum of 25mm. If a flashing is fixeddirectly over the board, the lap must be sealed with tape.

Wall lining

Insulating wall lining placed outside the sheeting railsmay be fixed as described above for over purlin rooflining. Alternatively, treated timber battens may beplaced outside the insulation and the lining boardsecured to the sheeting rails by self-tapping screwspassing through the batten and the insulation into thesheeting rails. The sheet cladding may then be secureddirectly to the battens or through the complete systemto the sheeting rails.

Compartment walls

Celotex Double-R LG3 PIR products, designated AAwhen tested to BS 476: Part 3, may be used withoutinterruption over fire-resisting compartment walls andpartitions, in compliance with the Building RegulationsApproved Document B, providing that appropriate firestopping is inserted between the lining board and thetop of the wall.

Cold Industrial Roof LG3 Over PurlinThickness

mmOutside surface - Weathering system -Ventilated cavity -Variable Layer (over purlin) See belowInside surface -

Variable Layer

Celotex & Mineral Wool Thickness U-valueProduct mm W/mK

LG3/25 + 170mm mineral wool 195 0.20LG3/25 + 115mm mineral wool 140 0.25LG3/30 + 160mm mineral wool 190 0.20LG3/30 + 115mm mineral wool 145 0.25LG3/40 + 150mm mineral wool 190 0.20LG3/40 + 105mm mineral wool 145 0.25LG3/50 + 140mm mineral wool 190 0.20LG3/50 + 95mm mineral wool 145 0.25

LG3 = Celotex Double-R LG3

LG3/25 = 25mm lining boardLG3/30 = 30mm lining boardLG3/40 = 40mm lining boardLG3/50 = 50mm lining board

Example U-value calculation: Cold industrial roof LG3

Celotex Double-R LG3 as used in over purlin

construction (does not show mineral wool)


Commercial and industrial applications Under purlin construction

Use Celotex Double-R LG3 insulating lining board in commercial,agricultural and industrial roofing applications. Offered with a whitepainted stucco embossed foil face, Celotex Double-R LG3 gives thefollowing benefits:

Approval from the Loss Prevention CertificationBoard (LPCB)

A Euroclass B fire rating Fully approved by fire insurers for use oncommercial and industrial buildings

Provides a semi-decorative internal finish For use in both under purlin and over purlinconstructions

Lightweight, rapidly installed and easily cut to shape

Cold Industrial Roof LG3 Under PurlinThickness

mmOutside surface - Weathering system - Ventilated cavity - Variable Layer (under purlin) See belowInside surface -

Variable Layer

Celotex & Mineral Wool Thickness U-valueProduct mm W/mK

LG3/25 + 175mm mineral wool 200 0.20LG3/25 + 125mm mineral wool 150 0.25LG3/30 +170mm mineral wool 200 0.20LG3/30 + 125mm mineral wool 155 0.25LG3/40 + 160mm mineral wool 200 0.20LG3/40 + 110mm mineral wool 150 0.25LG3/50 + 145mm mineral wool 195 0.20LG3/50 + 105mm mineral wool 155 0.25

LG3 = Celotex Double-R LG3

LG3/25 = 25mm lining boardLG3/30 = 30mm lining boardLG3/40 = 40mm lining boardLG3/50 = 50mm lining board

Example U-value calculation: Cold industrial roof LG3

Design considerations

Under purlin is a technique that is widely used forupgrading roofs of existing industrial buildings. There arefour primary considerations:

1. The condensation risk needs to be assessed on a case-by-case basis. Achieving an effective vapour seal aroundthe board edges requires very careful installation and itshould be assumed that the system will not be 100%vapour-tight. Care should be taken to provide ventilationacross the void above the ceiling or lining to disperse anymoisture vapour.

2. Most older buildings were not designed for theadditional weight of a suspended ceiling. A CelotexDouble-R LG3 lining is inherently the best option to usefor upgrading because of the low weight of the board.Designers are still advised to check the loadings of theroof before proceeding.

3. Buildings with large door openings, such aswarehouses and aircraft hangers, will be subject to rapidchanges in internal air pressure during windy weather. Itmay be necessary to provide rigid hangers for the gridsystem and to increase the clip frequency to prevent thelining or ceiling from floating.

4. Most insurers require buildings to satisfy LPCBstandards. Celotex Double-R LG3, which is listed in theLPCB approvals guide, must never be replaced with anon-LPCB certified product.


Celotex Double-R LG3 insulating lining boards must befixed in a gridwork of inverted tees, either directly underthe purlin or suspended from the purlin, down to theceiling plane.

Main tees are installed at board width (maximum1200mm centres) and are joined together by connectorsor splices. Main tees are suspended from the hanger strapsor 2mm twist-straightened suspension wire at a maximumof 2 metre centres (depending on the weight of the liningboard and the spanning performance of the tee). Refer tothe tee manufacturers guidelines for further information.

Rigid hangers are generally preferred and are essential ifthe area to be insulated is subject to sudden changes inair pressure, which might cause the finished lining orceiling to lift. The use of diagonal bracing within thesupporting gridwork, especially where the lining is fixedwell below the purlins, may also be required to counteractthe diaphragm effect of changes in air pressure.

Cross tees are designed to accommodate standard2400mm x 1200mm Celotex Double-R LG3 boards.

Perimeter angles are used as trim at eaves, ridges and allstructural abutments. Main tees are connected to thetrim with proprietary brackets, screws or rivets.

Mineral wool is loosely laid above the LG3 to achieverequired U-value.

Clipping

All boards must be securely retained using hold downclips to suit the board thickness. Clips should be installedat maximum 600mm centres. Closer clip centres will berequired if the lining is subject to wind uplift caused bysignificant internal pressure changes.

The last board in the system cannot be clipped, thereforeplasterboard or a similar dense material should be cut,just undersize to clear the suspension grid and laid ontoCelotex Double-R LG3 to act as a weight to hold downthe lining board evenly.

Wall linings

Industrial lining grids may also be used to secure Celotexboards when used as wall linings inside sheeting rails.The technique required is as previously described. At lowlevels, protection from traffic damage will be required.

Ventilation

Installation of Celotex Double-R LG3 lining boardscreates a large temperature differential between the coldvoid above the ceiling and the internal environment ofthe building. This type of application is known as coldroof design. Full and efficient ventilation of the voidshould be provided. Vapour sealing the board joistscannot be relied upon solely to reduce the risk ofcondensation.

Rooflights and lighting

Where natural daylight is to be retained, the opaquelining boards should be omitted from the grid to coincidewith the profiled roof lights within the weathering sheets.To maintain the integrity of the vapour seal, box-typetranslucent panels can be used to replace the liningboards within the grid. The box light can then be sealedinto the grid using mastic within the tee bars.

Light fittings fitted to the underside of the lining mayresult in an uneven surface appearance to the Celotex Double-R LG3 lining boards. For best appearance, lights should be suspended at least 500mm below thefinished ceiling.

Celotex Double-R LG3 as used in under purlinconstruction (does not

show mineral wool)

Environmental sustainability policy

Waste managementCelotex continually monitors the levels of wastefrom its activities and drives and implementsprocedures which help reduce the amount ofwaste produced. The company ensures that allemployees are aware of the importance ofreducing waste in all its activities.

A company suggestion scheme allows allemployees to suggest methods of reducingwaste both in production and non-productionareas. Thicker boards are packed via a differentpacking system, reducing the level of wastematerial by introducing a returnable elementthat can consistently be reused. Our currentmethod of cardboard packaging has seen a 30%reduction in the quantity of cardboard usedcompared to the previous method.

Recycling

Waste PIR is inert and land fill safe with no knowneffect on ground water. Glass-fibre used as corereinforcement in many of our boards, is made upalmost entirely from recycled waste glass,originating from double glazing. The majority ofour boards are packed in glued and stapledcardboard boards. This element is recyclable andmeans other methods of packaging such asshrink wrapping are avoided.

General informationStorage and handling

Celotex insulation boards should be storeddry, flat and clear of the ground. Only as muchmaterial as can be installed during a singleworking period should be removed from storageat any one time. If boards are stored undertarpaulins, care should be taken to prevent ropedamage to the boards.

Care should also be taken to ensure that packsare not dropped onto corners or edges.

Where possible, cut the product using atrimming knife, rather than a saw, to minimisedust creation.

If using a saw, dust extraction equipment, eyeprotection and face masks must be provided.Dust or particles in the eyes should be washedout with liberal quantities of water.

Aluminium foil edges may be sharp. Avoidsliding bare hands along board edges.

Health and safety

Full guidance on the appropriate measures to betaken by an employer in accordance with theCOSHH Regulations is provided in the CelotexHealth and Safety Data Sheet which can bedownloaded from our website.

Quality assurance

Product and application development is priorityat Celotex, with a focus on high performance,durability and usability. This is achieved through aquality managementsystem which has been fullyassessed and certified asmeeting the requirementsof BS EN ISO 9001:2000.

Other products

Celotex offers a comprehensive range ofinsulation products for floor, wall and roofapplications. For information please visitwww.celotex.co.uk or contact our SalesDepartment.

Ancillary components

A list of suppliers of ancillary components for thefixing and sealing of Celotex products is availablefrom www.celotex.co.uk or by contacting ourTechnical Advisory Service.

Celotex environmental policy

It is the policy of Celotex Limited that the Companywill at all times pursue strategies within itsoperations, product development and commercialactivities to assess and minimise negative impactson the environment whilst adhering to theprinciples of sustainable development, and toexpect similar environmental standards from itssuppliers and contractors. To satisfy this policyobjective specific attention will be paid to:

Compliance with the requirements of environmental legislation and approved codes of practice in all countries where we trade.

Minimising environmentally harmful emissions and noise from manufacturing operations.

Reducing waste generation from production and packaging of products.

Raising awareness, encouraging participation and training employees in environmental matters, especially recycling and waste reduction in non-production areas.

Developing strategies to enable the Companys products to be used/reused in an environmentally-sensitive way or recycled at the end of their useful life.

Optimising the use of waste materials in our manufacturing processes.

Developing new product formulations to reduce long term environmental damage to the Ozone Layer.

Optimising the use of energy in all manufacturing and business activities in order to reduce related Carbon Dioxide emissions.

Using timber products from sustainable (managed) forests, where available.

Liaising with the local community and participating in discussions about environmental issues.


Notes


* Calls are charged at 30p per minute from a BT landline and lines are open Monday Friday from 8:00am 5:15pm.Details and pricing are correct at date of publication November 2007.

Characteristics, properties or performance of materials described herein are derived from data obtained under controlled test conditions. CelotexLimited makes no warranty, express or implied as to their characteristics under any variations from such conditions in actual constructions.All products are supplied subject to our standard terms and conditions of sale, a copy of which is available on request.Typical details shown in this brochure are provided for guidance only and are not to scale. Celotex Limited makes no warranty, express or implied asto the suitability of such details for any particular project. It is the responsibility of the designer to ensure that any design or construction details usedare suitable for the project, having due regard to the environmental and structural factors which are beyond the control of Celotex Limited.Notwithstanding the foregoing, nothing herein stated shall exclude or restrict:1. The liability of Celotex Limited in respect of death or personal injury pursuant to the relevant provisions of the Unfair Contract Terms Act 1977, or2. The liability of Celotex Limited in respect of any damage caused by a defect to the extent that such comes within the relevant provisions of the

Consumer Protection Act 1987.

Notes


Celotex Technical Advisory ServiceT: 0901 996 0100* F: 01473 820889 E: [email protected]

Celotex SalesT: 01473 820820 F: 01473 828857 E: [email protected]

Celotex LimitedLady Lane Industrial Estate Hadleigh Ipswich Suffolk IP7 6BA

Registered in England No. 2183896

Documents

Celotex+Flat+Roof+Handy+Guide