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Innovare Systems Limited Unit 3 Siskin Parkway West Middlemarch Business Park Coventry CV3 4PW

Tel: 0845 017 6334 Fax: 024 7667 5723 Agrément Certificate e-mail: sales@innovaresystems.co.uk 08/S040 website: www.innovaresystems.co.uk Product Sheet 1

INNOVARE BUILDING SYSTEMS INNOVARE i-SIP BUILDING SYSTEM

This Agrément Certificate Product Sheet(1) relates to the Innovare i-SIP Building System, structurally insulated panels (SIPs) comprising oriented strand board, type 3 (OSB/3) and expanded polystyrene (EPS) insulation to form loadbearing walls and roofs in buildings up to a height of four storeys (including room-in-roof) and as infill panels. (1) Hereinafter referred to as ‘Certificate’.

CERTIFICATION INCLUDES: • factors relating to compliance with Building Regulations where

applicable • factors relating to additional non-regulatory information where

applicable • independently verified technical specification • assessment criteria and technical investigations • design considerations • installation guidance • regular surveillance of production • formal three-yearly review.

KEY FACTORS ASSESSED

Strength and stability — the SIPs have adequate strength and stiffness to resist the loads associated with installation and in-service loading (see section 6). Thermal performance — the system contributes to the overall thermal performance of the wall and roof construction (see section 7). Air permeability — walls and roofs can achieve adequate air barrier continuity provided there is effective sealing around junctions, openings and penetrations (see section 8). Condensation risk — walls and roofs can adequately limit the risk of surface and interstitial condensation (see section 9). Behaviour in relation to fire — with adequate protection, panels used in structural external and separating walls will satisfy the required fire resistance periods given in the relevant national Building Regulations (see section 10). Resistance to airborne sound — test data indicate that separating walls used in conjunction with suitable linings and flanking elements with additional plasterboard and soundproof linings and detailing shown in this Certificate, will provide sufficient resistance to airborne sound (see section 12). Durability — provided the installation remains watertight, the SIPs will have a 60-year minimum service life provided they are protected from damage by the external and internal finishes (see section 15).

The BBA has awarded this Certificate to the company named above for the system described herein. This system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate.

On behalf of the British Board of Agrément

Date of Fourth issue: 10 October 2019

Originally certificated on 18 December 2008

Paul Valentine Technical Excellence Director

Claire Curtis-Thomas Chief Executive

The BBA is a UKAS accredited certification body – Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at www.bbacerts.co.uk Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct.

Any photographs are for illustrative purposes only, do not constitute advice and should not be relied upon.

British Board of Agrément Bucknalls Lane Watford Herts WD25 9BA

©2019

tel: 01923 665300

clientservices@bbacerts.co.uk www.bbacerts.co.uk

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Regulations

In the opinion of the BBA, the Innovare i-SIP Building System, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements of the following Building Regulations (the presence of a UK map indicates that the subject is related to the Building Regulations in the region or regions of the UK depicted):

The Building Regulations 2010 (England and Wales) (as amended)

Requirement: Comment:

A1 Loading Walls and roofs constructed from the panels will have sufficient strength and stiffness when designed and constructed in accordance with sections 6.1 to 6.9 of this Certificate.

Requirement: A3 Disproportionate collapse Comment: Wall panels can contribute to a construction satisfying this Requirement. See section

6.10 of this Certificate. Requirement: B3(1)(2)(3) Internal fire spread (structure) Comment: (a)(4) Walls with the requisite lining can give 30 or 60 minutes fire resistance. See sections

10.1, 10.6 and 10.7 of this Certificate. Requirement: C2(c) Resistance to moisture Comment: The panels can adequately limit the risk of surface condensation and contribute to

minimising the risk of interstitial condensation. See section 9 of this Certificate. Requirement: Comment:

E1

Protection against sound from other parts of the building and adjoining buildings When installed with suitable linings and flanking elements, separating walls incorporating the panels can satisfy this Requirement. See sections 12.1 and 12.2 of this Certificate.

Requirement: E2(a) Protection against sound within a dwelling house etc. Comment: A single-leaf, non-loadbearing partition incorporating the panels with suitable

plasterboard linings, can satisfy this Requirement. See sections 12.1 and 12.2 of this Certificate.

Requirement: Comment:

L1(a)(i) Conservation of fuel and power (New dwellings)

The panels can contribute to satisfying this Requirement, although compensating fabric measures may be required. See sections 7 and 8.1 of this Certificate.

Requirement: L2(a)(i) Conservation of fuel and power (New buildings other than dwellings)

Comment: Walls and roofs constructed from the panels can satisfy this Requirement. See sections 7.1 to 7.6, 8.1 and 8.2 of this Certificate.

Regulation: Regulation:

7 7(1)

Materials and workmanship (applicable to Wales only) Materials and workmanship (applicable to England only)

Comment: The panels are acceptable. See section 15 and the Installation part of this Certificate.

Regulation: 26 CO2 emission rates for new buildings Regulation: 26A Fabric energy efficiency rates for new dwellings (applicable to England only) Regulation: Regulation: Comment:

26A 26B

Primary energy consumption rates for new buildings (applicable to Wales only) Fabric performance values for new dwellings (applicable to Wales only) The panels can contribute to satisfying these Regulations although compensating fabric and/or services measures may be required. See sections 7 and 8.1 of this Certificate.

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The Building (Scotland) Regulations 2004 (as amended)

Regulation: 8(1) Durability, workmanship and fitness of materials Comment: The system panels can contribute to a construction satisfying this Standard. See

sections 14 and 15 and the Installation part of this Certificate. Regulation: 9 Building standards applicable to construction Standard: 1.1(a) Structure Comment:

Walls and roofs incorporating the panels will have sufficient strength and stiffness, with reference to clauses 1.1.1(1) and 1.1.2(1) of this Standard, when designed and constructed in accordance with sections 6.1 to 6.10 of this Certificate.

Standard: 1.2 Disproportionate Collapse Comment: Walls will have adequate strength and stiffness to satisfy this Standard, with

reference to clause 1.1.1(1)(2) and, when suitable reinforced, clause 1.2.1(1)(2). See sections 6.1 and 6.2 of this Certificate.

Standard: 2.1 Compartmentation Standard: Comment:

2.2 Separation

Walls using the appropriate lining can achieve a period of fire resistance of ‘medium’ duration with reference to clauses 2.2.1(1) to 2.2.3(1) of this Standard. See sections 10.1 and 10.5 of this Certificate.

Standard: 2.3 Structural protection

Comment:

Walls using the appropriate lining can achieve a period of fire resistance of ‘medium’ duration with reference to clauses 2.3.1(1), 2.3.3(1) and 2.3.5(1) of this Standard. See section 10.1 of this Certificate. See also section 10.3 of this Certificate with reference to clause 2.3.2(1) of this Standard.

Standard: 2.4 Cavities Comment: Walls using an appropriate cavity barrier can satisfy this Standard, with reference to

clauses 2.4.1(1) to 2.4.7(1). See section 10.6 of this Certificate.

Standard: 2.6 Spread to neighbouring buildings

Comment: Walls constructed from the panels using the appropriate lining can achieve a period of fire resistance of ‘medium’ duration, with reference to clauses 2.2.1(1) to 2.2.3(1), 2.3.1(1) and 2.6.1(1) of this Standard. See sections 10.1, 10.5 and 10.6 of this Certificate.

Standard: 3.15 Condensation Comment: The panels can adequately limit the risk of surface condensation and will contribute

to minimising the risk of interstitial condensation, with reference to clauses 3.15.1(1) to 3.15.4(1) of this Standard. See section 9 of this Certificate.

Standard: 5.1 Noise separation

Comment: Separating walls with suitable linings and flanking elements can satisfy this Standard with reference to clauses 5.1.1(1), 5.1.2(1), 5.1.4(1). See sections 12.1 and 12.2 of this Certificate.

Standard: 5.2 Noise reduction between rooms Comment: Separating walls constructed from the panels with suitable flanking elements satisfy

this Standard, with reference to clauses 5.1.1(1), 5.1.2(1), 5.1.4(1) and 5.1.6(1). See sections 12.1 and 12.2 of this Certificate.

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Standard: 6.1(b) Carbon dioxide emissions Comment: The panels can contribute to satisfying this Standard, with reference to clauses

6.1.2(1) and 6.1.6(1). Compensating fabric and/or services measures may be required. See sections 7 and 8.1 and 8.3 of this Certificate.

Standard: 6.2 Building insulation envelope Comment: The panels will enable, or contribute to enabling, a wall to satisfy clauses 6.1.2(1),

6.1.6(1), 6.2.1(1), 6.2.3(1), 6.2.4(1) and 6.2.5(1) of this Standard. See section 7 of this Certificate.

Standard: 7.1(a)(b) Statement of sustainability Comment: The panels can contribute to satisfying the relevant requirements of Regulation 9,

Standards 1 to 6 and therefore will contribute to a construction meeting a bronze level of sustainability as defined in this Standard. In addition, the panels can contribute to a construction meeting a higher level of sustainability as defined in this Standard, with reference to clauses 7.1.4(1)(2) [Aspects 1(1)(2) and 2(1)], 7.1.6(1)(2) [Aspects 1(1)(2) and 2(1)] and 7.1.7(1)(2) [Aspect 1(1)(2)]. See section 7.1 to 7.6 of this Certificate.

(1) Technical Handbook (Domestic).

(2) Technical Handbook (Non-Domestic).

The Building Regulations (Northern Ireland) 2012 (as amended)

Regulation: 23(a)(i) Fitness of materials and workmanship Comment: (iii)(b)(i) The panels are acceptable. See section 15 and the Installation part of this Certificate. Regulation: 29 Condensation Comment: The panels can contribute to minimising the risk of interstitial condensation. See

sections 8.1, 8.2 and 9 of this Certificate. Regulation: 30 Stability Comment: Walls and roofs constructed from the panels will have sufficient strength and stiffness

to satisfy this Regulation, when designed and constructed in accordance with sections 6.1 to 6.10 of this Certificate.

Regulation: Comment:

31 Disproportionate collapse Walls incorporating the panels will have adequate strength and stiffness to satisfy this Regulation. See sections 6.1, 6.2 and 6.4 of this Certificate.

Regulation: 35 Internal fire spread — Structure Comment:

Walls incorporating the panels, when used with suitable flanking elements, can satisfy this Regulation. See sections 10.1 and 10.6 of this Certificate.

Regulation: 39(a) Conservation measures Regulation: 40 Target carbon dioxide Emissions Rate Comment: The panels will enable, or contribute to enabling, a wall to satisfy these Regulations.

See section 7 of this Certificate. Regulation: 49 Protection against sound from other parts of the building and from adjoining

buildings

Comment: When installed with suitable flanking elements, separating walls incorporating the panels can satisfy this Regulation. See sections 12.1 and 12.2 of this Certificate.

Regulation: 50 Protection against sound within a dwelling or room for residential purposes

Comment: A single-leaf, non-loadbearing partition incorporating the panels, with suitable plasterboard linings, can satisfy this Regulation. See sections 12.1 and 12.2 of this Certificate.

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Regulation: 51 Reverberation in the common internal parts of a building containing flats or rooms for residential purposes

Comment: Separating walls can satisfy this Regulation. See sections 12.1 and 12.2 of this Certificate.

Construction (Design and Management) Regulations 2015 Construction (Design and Management) Regulations (Northern Ireland) 2016 Information in this Certificate may assist the client, designer (including Principal Designer) and contractor (including Principal Contractor) to address their obligations under these Regulations. See sections: 3 Delivery and site handling (3.7) and the Installation part of this Certificate.

Additional Information

NHBC Standards 2019 In the opinion of the BBA, the Innovare i-SIP Building System, if installed, used and maintained in accordance with this Certificate, can contribute to satisfying the relevant requirements in relation to NHBC Standards, Chapters 6.2 External timber framed walls, 7.1 Flat roofs and balconies and 7.2 Pitched roofs.

Technical Specification

1 Description 1.1 The Innovare i-SIP Building System comprises SIPs manufactured from two skins of OSB/3 to BS EN 300 : 2006 bonded with a two-part polyurethane adhesive to an insulated core of grey EPS 100E to BS EN 13163 : 2012. Each panel incorporates a solid timber top and rebated bottom panel closer for fixing directly to the timber sole plate. Panels also incorporate vertical rebates and are joined together using timber studs and mechanical fixings. 1.2 The panels are available in the following dimensions: Length (m) <6 Width (m) <2.77 OSB skins (mm) ≥11 Insulation core (mm) 89 to 285 Overall thickness (mm) ≥111. 1.3 Other components used with the system are:

top and bottom panel closers — at least 38 mm thick and 89 to 285 mm wide timber of strength grade C16 or better, to suit insulation core

timber splines — timber of strength grade C16 or better

lintels — timber of strength grade C16 or better, depth to suit structural requirements

sole plate — timber, strength grade C16 or better, to BS 8417 : 2011, used to locate and fix bottom of panel closer. 1.4 Ancillary items bought in to the Certificate holder’s declared specification and necessary to complete the construction, but outside the scope of this Certificate, are:

floors — factory-produced cassette or components supplied separately comprising: I-beam or open-web engineered joists with particle board to BS EN 312 : 2010 or plywood flooring to BS EN 636 : 2012

roofs (alternative) — factory-produced flat cassettes or components supplied separately comprising: I-beam or open-web engineered joists with particle board to BS EN 312 : 2010 or plywood flooring to BS EN 636 : 2012

internal non-loadbearing partitions — typically 38 by 89 mm timber studs

internal loadbearing partition — timber studs (size and centres to design requirements) sheathed with OSB

trussed, standard or attic rafters — to BS EN 1995-1-1 : 2004

timber ridge and intermediate purlins — designed to BS EN 1995-1-1 : 2004

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breather membrane — vapour permeable membrane used for walls with a required vapour resistance of 0.21 MN·s·g–1

joint sealant — intumescent acrylic infill strips

perimeter edge beam (rim beam) — timber, dimensions and specification to suit engineer’s design

SIP screws — to the Certificate holder’s specification. 1.5 Associated general ancillary items that may be required, but which are outside the scope of this Certificate, include:

multiple screed rail — minimum 38 mm, treated timber to BS 8417 : 2013, used to support the sole plate

plasterboard — to BS EN 520 : 2004

wall ties type A (external wall) — stainless steel to BS EN 845-1 : 2013, Type 6

wall ties type B (separating wall) — 250 mm long by 30 mm wide by 2.5 mm thick galvanized steel flat strip at 1200 mm horizontal centres located at each floor level or equivalent, as agreed with the Certificate holder

fixings — proprietary types to BS EN 1995-1-1 : 2004

sole plate to screed rail fixings — 3.2 mm diameter by 75 mm long ring shank nails

panel to sole plate fixings— 3.2 mm diameter by 90 mm long ring shank nails

timber battens — for internal linings and external cladding

tiling/slate battens — treated softwood to BS 5534 : 2014

fire stops — mineral wool slab to BS EN 13501-1 : 2018 used as a cavity barrier

infill panel bracket — typically Simpson E9S 2.5 mm thick bracket with vertical slotted hole

SIP screw — minimum 8 mm diameter with 2.5 mm thick washer or drop-in

expanded concrete anchor bolt — minimum 8 mm diameter (for fixing to concrete)

foundations

waterproofing — roof and wall.

2 Manufacture 2.1 The system components are bought in to agreed specifications, cut to size and/or assembled to form the completed panels. 2.2 As part of the assessment and ongoing surveillance of product quality, the BBA has: agreed with the manufacturer the quality control procedures and product testing to be undertaken assessed and agreed the quality control operated over batches of incoming materials monitored the production process and verified that it is in accordance with the documented process evaluated the process for management of nonconformities checked that equipment has been properly tested and calibrated undertaken to carry out the above measures on a regular basis through a surveillance process, to verify that the specifications and quality control operated by the manufacturer are being maintained. 2.3 The management system of Innovare Systems Limited has been assessed and registered as meeting the requirements of BS EN ISO 9001 : 2015 by DNV-GL (Certificate 185761-2015-AQ-GBR-UKAS).

3 Delivery and site handling 3.1 Good site practice should be observed to prevent damage to the system components. The panels can withstand the normal loads associated with site handling and installation. 3.2 Each panel bears a unique identification and location reference corresponding with the build layout drawing. 3.3 The panels are delivered on vehicles suitable for the load and sites involved. 3.4 Panels are stacked in sequence to suit the erection requirements and generally adjacent to each plot/level. 3.5 Panels should be moved to a location for storage/build and placed off the ground on bearers. Where packs are stacked on top of each other, bearers must be kept in line and should also be thick enough to allow the insertion of crane web-strap lifting slings or forklift extended forks without damage. Panels should not be stacked upright unless agreed by the Certificate holder.

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3.6 Only limited exposure of panels to weather is recommended. Typically, panels are supplied and erected immediately, but where storage for any period is required, the panels must be suitably protected from the weather. 3.7 Where the panel weight exceeds manual handling limits, panels are raised into position using lifting straps and mechanical lifting equipment. 3.8 Floor and roof cassettes should be stored and transported in accordance with their respective manufacturer’s guidelines. 3.9 All other ancillary items should be suitably stored undercover and in dry conditions until required for use.

Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on the Innovare i-SIP Building System.

Design Considerations

4 General 4.1 The Innovare i-SIP Building System is for use as a loadbearing element to external walls, above the damp-proof course (dpc), in single- or multiple-occupancy constructions in buildings up to a height of four storeys (including room-in-roof). The panels can also be incorporated as part of a separating(1) wall, as internal walls and in roof constructions. All designs should be undertaken by a suitably qualified and experienced individual familiar with the design and application of the system. (1) Separating walls are of either SIPs or timber-framed construction approved by Robust Details Limited.

4.2 The panels may also be used as infill panels in multi-storey framed buildings up to 18 metres (to highest floor level from ground level), subject to design and fire constraints and the method of fixing to structural frame. All fixings must be designed to allow movement within the structural frame due to expansion/contraction or differential movement. 4.3 It is essential that the system is designed in accordance with the Certificate holder’s recommendations with regard to structural analysis, design details and drawings, and installed using their trained and approved operatives. 4.4 Foundations must be approved for use by the Certificate holder and should be suitably level and square to accept the system (see section 17.3).

5 Practicability of installation The system should only be installed by builders who have been trained and approved by the Certificate holder.

6 Strength and stability General

6.1 The wall panels will have adequate strength and stiffness when used in accordance with the provisions of this Certificate.

6.2 The design values to be used when evaluating the design resistance of the panels are given in Table 1. 6.3 Although not covered by this Certificate, floor cassettes form an integral part of the system and the designer must ensure that the use of these elements complies with the manufacturer’s design criteria in respect of loading, maximum spans and detailing requirements. 6.4 The formation of openings for windows and doors in panels (including additional strengthening such as lintels and framing around openings) should only be carried out under approved factory conditions or, alternatively on site, by using individual pre-engineered panels. The structural design of any buildings must take account of the reduction

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in loadbearing capacity of the panels and the overall stability of the building due to the number and location of openings. Small service openings for pipework for flues (see section 11) may only be made through the panels on site when agreed by the Certificate holder. 6.5 When the panels are used to construct the inner leaf of an external cavity wall, the outer masonry leaf and all masonry below the dpc must be designed and constructed in accordance with BS EN 1995-1-1 : 2004, BS EN 1996-2 : 2006 and either BS EN 1996-3 : 2006 or BS EN 1996-1-2 : 2005.

Table 1 Guidance for structural capacities of the panels (calculated in accordance with BS EN 14509 : 2006, Annex E, and BS EN 1995-1-1 : 2004) 111 mm thick panel

Instantaneous/ short-term / permanent

162 mm thick panel instantaneous / short-

term / permanent

257 mm thick panel instantaneous / short-

term / permanent

Ultimate capacities Bending strength (kN·m·m–1) 15.53 12.71 9.88 23.45 19.18 14.92 38.20 31.25 24.31 Shear strength (kN·m–1) — — 4.45 — — 7.00 — — 1.75 Axial strength (kN·m–1)

wall height 2400 mm 56.39 32.59 25.34 89.89 52.37 40.73 153.09 89.79 69.84 wall height 2700 mm 53.61 30.84 23.99 86.74 50.35 39.16 149.60 87.53 68.08 wall height 3000 mm 50.88 29.13 22.65 83.55 48.31 37.57 145.96 85.17 66.24

Stiffness El (N·mm–2) 1.95

x 1011 1.60

x 1011 0.71

x 1011 4.46

x 1011 3.65

x 1011 1.62

x 1011 11.80 x 1011

9.68 x 1011

4.30 x 1011

GA (N) 3.71 x 105

0.82 x 105

0.46 x 105

5.37 x 105

1.19 x 105

0.67 x 105

8.50 x 105

1.89 x 105

1.06 x 105

Notes:

these structural capacities provide the designer with sufficient information to carry out an initial design calculation check. The Certificate holder can supply further information on the design methodology on request

tabulated load capacities were compared with laboratory test results carried out on a range of SIPs to verify the calculated figures

serviceability deflection limits must be taken into account according to load duration

in addition, designers should note the results of fire tests and the associated applied load (see section 10.1).

6.6 The tiles and slates used in the roof construction should be specified in accordance with BS 5534 : 2014. The type and arrangement of fixings must be adequate to resist any wind or other loads imparted on the tiles or slates.

Structural aspects

6.7 The ultimate structural capacity data for the panels, given in Table 1, are based on the design principles set out in BS EN 14509 : 2013 and BS EN 1995-1-1 : 2004. Designers should familiarise themselves with both documents before using the tabulated data and/or contact the Certificate holder for further advice. When carrying out individual building design calculations, serviceability limits should also be taken into account in respect of deflection, depending on load duration.

6.8 Additional panel strengthening, in the form of structural timber posts or studding within the panel construction, may be considered but has not been assessed by the BBA. The Certificate holder should be contacted for further details. 6.9 A basic wall racking resistance of 2.52 kN·m–1 for wall panels(1), based on racking tests to BS EN 594 : 1996 and derived from BS EN 1995-1-1 : 2004 can be assumed. (1) Using 3.2 mm diameter, 90 mm long ring shank nails at 150 mm centres to fix panels to top and bottom panel closers, and to vertical spline joints.

6.10 The structure incorporating the system must be designed by an appropriately qualified structural engineer to satisfy the requirements of disproportionate collapse in the national Building Regulations and BS EN 1991-1-7 : 2006 (Consequence Class 1) and its UK National Annex.

6.11 The strength of all connection details tying walls, floors and roofs must be evaluated to ensure stability of the overall building design. The specification and design of these items must be determined by the engineer responsible for the stability of the building. Guidance on the design of connection details may be obtained from the Certificate holder.

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6.12 Lintels and framing around openings form an integral part of the loadbearing wall panels (see Figure 1). The sizing of lintels and framing is the responsibility of a suitably qualified and experienced individual. 6.13 As part of the structural design, consideration should be given to the support of eccentric loads imparted by, for example, central heating systems or kitchen appliances. 6.14 Stainless steel wall ties(1) to BS EN 845-1 : 2013 and PD 6693-1 : 2012 Type 6, can be directly attached to the OSB/3 face of the panel using stainless steel, timber-frame fixing screws or as approved by the Certificate holder(2). (1) Spaced in accordance with BS EN 1991-1-4 : 2005 (centres vary depending on wind speed). (2) SIP wall ties (typically Simpson Strong-Tie SWT) are attached with stainless steel screw fasteners to BS EN 1995-1-1 : 2004. When tested to BS EN 846-6 : 2000, a declared value of 498 N was achieved using an 11 mm thick OSB with a 140 mm thick polystyrene core, Simpson Strong-Tie BTS4 timber-frame wall tie and a Spax 4 mm diameter by 30 mm long screw.

Figure 1 Detail openings

7 Thermal performance

7.1 Calculations for particular wall constructions can be carried out in accordance with the ‘combined

method’ in BS EN ISO 6946 : 2017 and BRE Report BR 443 : 2006. The following thermal conductivities (W·m–1·K–1) may be used to conduct a ‘combined method’ calculation:

plasterboard 0.250

timber 0.130

EPS grey 0.030(1)

OSB 0.130. (1) Lambda declared (lD90/90 value).

7.2 A wall constructed with the system will satisfy the requirements of the following national Building Regulations: England and Wales — Approved Document L1, Table 1 Scotland — Mandatory Standard 6.2, clause 6.2.1(1), Table 1 Northern Ireland — Technical Booklet F, Table 1.2. (1) Technical Handbook (Domestic).

7.3 Typical external wall constructions are made up (in sequence from inside to outside) of:

plasterboard

timber battens

Innovare i-SIP panel

breather membrane

50 mm cavity

brick outer leaf (services can be housed behind the plasterboard).

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7.4 Typical U values are given in Table 2.

Table 2 Typical U values for wall and roof constructions Element panel Overall SIP thickness

(mm) U value

(W·m–2·K–1)

External wall(1) 111 136 162 206 257 267

0.26 0.21 0.18 0.14 0.12 0.11

Roof(2)

162 206 257 267

0.19 0.15 0.12 0.12

(1) External wall build-up is based upon a 50 mm wide cavity and brick outer leaf. (2) Roof build-up is based upon a ventilated roof void and tiled exterior. Values were calculated at 4% timber content.

7.5 The thermal insulation fully fills the panels and the junctions between the panels can adequately limit heat loss. The Certificate holder calculates linear thermal transmittance (Ψ-value) for each panel interface, which must be considered in addition to the planar u-values when calculating thermal performance in models such as SAP 2012 The Government’s Standard Assessment Procedure for Energy Rating of Dwellings or Simplified Building Energy Model (SBEM). 7.6 Junctions with other elements should be designed to limit heat loss. Guidance given in BRE Report BR 262 : 2002 or BRE Information Paper IP 1/06 is acceptable.

8 Air permeability

8.1 Buildings can achieve adequate resistance to heat loss by air infiltration provided there is effective sealing around junctions between units during site assembly. Care should be taken to ensure that junctions with other elements and openings comply with the relevant guidance for airtightness given in the relevant documents referred to in section 7.5.

8.2 In England, Wales and Northern Ireland, completed buildings are subject to pre-completion testing

for airtightness in accordance with the requirements of Approved Documents L1A and L2B, Section 20A, Technical Booklet F1 (sections 2.59 to 2.69) and Technical Booklet F2, Sections 2.72 to 2.77.

8.3 In Scotland, completed dwellings are subject to testing air permeability in accordance with the

requirements of Mandatory Standard 6.2 (Clause 6.2.5). Alternatively, where a default design value of 15 m3·h–1·m–2, at a 50 Pa is stated in demonstrating compliance under Mandatory Standard 6.1, testing is not required.

9 Condensation risk Surface condensation

9.1 The risk of surface condensation in roofs and external walls, and at junction and opening details (see Figures 2 to 6) will be minimal.

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Interstitial condensation

9.2 The Certificate holder will provide project specific U-value and condensation risk assessments using modelling software to BS 5250 : 2011 and BS EN ISO 13788.

9.3 The risk of interstitial condensation in both the external walling and roofing is greatest when the building is drying out after construction. Guidance on preventing condensation is given in BRE Digest 369 and BRE Report 262 : 2002.

10 Behaviour in relation to fire

10.1 When tested to BS EN 1365-1 : 1999, the wall panel elements achieved the results given in Table 3.

Table 3 Fire performance Performance Axial load

(kN·m–1) Construction

Results

(integrity/insulation/ loadbearing capacity)

(in minutes)

FR90

20

111 mm i-SIP 12.5 mm plasterboard (10.8 kg·m–2)

25 mm deep galvanized steel battens at 600 mm centres 25 mm glasswool insulation

12.5 mm plasterboard (8.3 kg·m–2) 15 mm plasterboard (13.2 kg·m–2)

96 (tested to failure)

FR60

20

111 mm i-SIP 12.5 mm plasterboard (10.8 kg·m–2) 15 mm plasterboard (13.2 kg·m–2)

62 (no failure)

FR60

20

162 mm i-SIP 12.5 mm plasterboard (10.8 kg·m–2)

25 mm x 47 mm timber battens at 600 mm centres 15 mm plasterboard (13.2 kg·m–2)

62 (no failure)

FR30

20

162 mm i-SIP 25 mm x 47 mm timber battens at 600 mm centres

15 mm plasterboard (13.2 kg·m–2)

38 (no failure)

Notes:

to simulate a service load during testing, a load of 20 kN·m–1 was applied to the top of the panels via a spreader beam (total load 60 kN) the design axial load for the 162 mm thick wall panels is between 40.73 (2400 mm high) and 37.57 kN·m–1 (3000 mm high), therefore, the fire test panels were subjected to between 49 and 53% of the design load the design axial load for the 111 mm thick wall panels is between 25.34 (2400 mm high) and 22.65 kN·m–1 (3000 mm high), therefore, the fire test panels were subjected to between 78 and 88% of the design load.

10.2 Assessment of test results and design details shows that wall panels are suitable for use in external walls (with service loads up to the stated values in Table 3) not less than one metre from a relevant boundary, and in separating walls that require fire resistance periods not less than 30 minutes(1) from inside (external walls) and 60 minutes(2) from either side (separating walls). (1) Short duration in Scotland. (2) Medium duration in Scotland.

10.3 The OSB/3 panel skins have a Class 3(1) surface spread of flame designation. (1) ‘High risk’ in Scotland.

10.4 Junctions between the panels in external and separating walls will adequately maintain the fire resistance of the separating wall through use of fire stops.

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Figure 2 Typical separating wall detail (fire stopping)

10.5 The panels can form part of a separating wall between dwellings in Scotland in accordance with the exceptions permitted by Mandatory Standard 2.2, Clause 2.2.7(1). (1) Technical Handbook (Domestic).

10.6 Constructions incorporating the system must include suitable provision for cavity barriers and for

fire stopping at junctions with other elements in accordance with the requirements of national Building Regulations (see Figure 2).

10.7 The panels should not be used on buildings in England that have a storey at least 18 metres above ground level and contain: one or more dwellings, an institution, a room for residential purposes (excluding any room in a hostel, hotel or boarding house), student accommodation, care homes, sheltered housing, hospitals or dormitories in boarding schools.

10.8 Where any other form of wall construction incorporating the wall panels (including any service penetrations) is subject to fire-resistance requirements, it is the responsibility of the user to provide details of an appropriate assessment or test carried out by a United Kingdom Accreditation Service (UKAS)-approved testing laboratory. 10.9 The external fire rating of any roof incorporating the panels will depend on the specification of the roof covering used. 10.10 When used as infill panels in multi-storey buildings, designers should note the requirements set out in Approved Documents in England and Wales and Northern Ireland that all materials used in the cavity above 18 metres must be of limited combustibility, or non-combustible in Scotland. Above 18 metres in height, buildings should be designed and constructed in accordance with the recommendations of BRE Report BR 135 : 2003.

11 Proximity of flues and appliances When installing the system in close proximity to certain flue pipes and/or heat producing appliances, the provisions to the national Building Regulations are applicable: England and Wales — Approved Document J Scotland — Mandatory Standard 3.18, clauses 3.18.1(1) to 3.18.6(1)

Northern Ireland — Technical Booklet L. (1) Technical Handbook (Domestic).

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12 Resistance to airborne sound

12.1 Acoustic testing should be carried out on completed buildings in accordance with the relevant national Building Regulations as follows:

England and Wales — Approved Document E, Section 1 Scotland — Mandatory Standard 5.1, 5.1.2(1) Northern Ireland — Technical Booklet G. (1) Technical Handbook (Domestic).

12.2 Laboratory test data relating to measurements made in accordance with BS EN ISO 140-3 : 1995 indicate that the separating wall constructions detailed in Table 4 of this Certificate have the resistances to airborne sound transmission stated. The test data indicate that in England and Wales, the wall constructions can provide satisfactory resistance to airborne sound transmission within a dwelling for walls between a WC or bathroom and another room.

Table 4 Airborne sound insulation (dB) – Laboratory test results Rw + Ctr (dB) Rw (C; Ctr) (dB) Separating wall construction

54 62.1 (-2 ; -8) 15 mm plasterboard (13.2 kg·m–2) 12.5 mm plasterboard (8.3 kg·m–2)

25 mm glasswool insulation 25 mm deep galvanized steel battens at 600 mm centres

12.5 mm plasterboard (10.8 kg·m–2) 111 mm iSIP

50 mm cavity packed with 50 mm mineral wool (14.5 kg·m–3) 111 mm iSIP

12.5 mm plasterboard (10.8 kg·m–2) 25 mm deep galvanized steel batons at 600 mm centres

25 mm glasswool insulation 12.5 mm plasterboard (8.3 kg·m–2) 15 mm plasterboard (13.2 kg·m–2)

All joints taped and skimmed, perimeter sealed 53 68.2 (-7; -15) 15 mm plasterboard (13.2 kg·m–2)

12.5 mm plasterboard (10.8 kg·m–2) 111 mm i-SIP

50 mm cavity packed with 50 mm mineral wool (14.5 kg·m–3) 111 mm i-SIP

12.5 mm plasterboard (10.8 kg·m–2) 15 mm plasterboard (13.2 kg·m–2)

12.3 It is essential that care is taken in design and during installation to avoid direct paths for airborne sound transmission and to minimise paths for flanking sound transmission.

13 Weathertightness 13.1 When the wall panels are used to form the inner leaf of an external cavity wall, the outer leaf must be designed and constructed in accordance with BS EN 1996-3 : 2006, BS EN 1996-2 : 2006, and BS EN 1996-1-2 : 2005 incorporating a dpc and cavity trays positioned in accordance with the latter Code. A breather membrane is required with this form of construction. 13.2 When used with other outer leaf construction, cladding or render systems, the final weather resistance of the building is dependent upon the efficient positioning and sealing of all joints. The guidance given in BRE Report BR 262 : 2002, Section 3, should be followed with regard to rain penetration in that the designer selects a construction appropriate to the local wind-driven rain index, paying due regard to the design detailing, workmanship and materials to be used. 13.3 Roofing should be detailed in accordance with BS 5534 : 2014 to ensure moisture is prevented from coming into contact with the panels. 13.4 The performance of windows and doors installed within the system is outside the scope of this Certificate.

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14 Maintenance and repair

14.1 Although maintenance is not envisaged for the wall panels, regular checks should be carried out on the finishes to ensure that any damage is detected and repaired as soon as possible.

14.2 Minor repairs to the system can be carried out to the wall panels prior to erection in accordance with the Certificate holder’s construction manual.

15 Durability

15.1 The wall panels will have comparable durability to that of OSB/3 to BS EN 300 : 2006, therefore, provided the installation remains weathertight and damp-proof, a design life of at least 60 years may be expected.

15.2 Timber used in areas that could be at risk, eg screed rails, should be preservative-treated in accordance with the recommendations given in BS 8417 : 2011.

16 Reuse and recyclability The system comprises OSB/3 and polystyrene which can be recycled.

Installation

17 General 17.1 The Innovare i-SIP Building System should be installed by operatives who have been trained and assessed by the Certificate holder to undertake this work. Any installation work should follow the details and information contained in the construction drawings, as prepared by the Certificate holder or appointed agent. 17.2 Erection of the wall panels must comply with the details given in the Certificate holder’s Erection Guide and the provisions of this Certificate. 17.3 The main contractor must ensure that the accuracy of the foundation is in accordance with the Certificate holder’s instructions, in particular, some details must be within the following tolerances in respect of line, level and squareness:

the level of the foundation or other bearing support — ±5 mm

the overall width and length of the building footprint and individual wall lengths — within ±10 mm

the diagonals used for checking the overall squareness of the building should be: ­ up to 10 m: ±5 mm ­ over 10 m: ±10 mm.

17.4 When used as infill panels, the main contractor must ensure that the accuracy of the structural frame is in accordance with the Certificate holder’s acceptable tolerances:

panels to be held in place with proprietary brackets to designer’s specification

a 40 mm gap should be left at the head of the infill panel to allow for expansion/differential movement and a 15 mm vertical tolerance gap at each side between edge of panel and column. The gap should be filled with an expanding urethane foam or proprietary compressible foam.

17.5 Guidance to the procedure for installing the infill panels is limited due to the variations in the structural frame construction and detailing. Erection methods for lifting infill panels into place, specification and design brackets, fixings and tolerances will therefore need to be determined by an experienced and suitably qualified individual for each structure in which the infill panels are used. Typical installation details are given in Figure 3.

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Figure 3 Typical construction detail

18 Procedure Foundation construction 18.1 A suitable dpc is laid on top of the foundation onto which a screed rail is fixed to the foundation using fixings as designed by an experienced and suitably qualified individual. 18.2 A sole plate (see Figure 2) is positioned and fixed to the screed rail using 3.2 mm diameter by 75 mm long ring shank nails at 100 mm staggered cross centres or as approved by the Certificate holder and the Chartered Structural Engineer’s requirements. Ground-floor construction (see Figure 4) 18.3 Commencing at the first corner, the wall panel is positioned onto the sole plate, aligned vertically and fixed to the plate with 90 mm long by 3.2 mm diameter ring shank nails at 150 mm centres through the OSB inner and outer skins. The panel is temporarily braced to maintain stability. The second panel, to form the corner, is positioned on the sole plate, butted to the first panel and aligned vertically (±10 mm over cumulative building height). Both panels are connected together, using SIP screws and washers at 300 mm centres, braced together horizontally and propped for stability.

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Figure 4 Corner and junction detail

18.4 A solid timber connecting stud is inserted into the panel rebate and the next panel lifted and positioned into place. The joint is made tight and 3.2 mm diameter by 90 mm long ring shank nails at 150 mm centres are fixed through the OSB inner and outer skins. This process continues until the ground floor construction is complete. Finally, the top panel closers and connecting plates are fitted, ready to receive the first floor construction. 18.5 The floor cassettes are supported directly on the tops of the wall panels and secured to the wall panel top plate. Rim beams are provided along external edges of the floor cassettes to transfer load from upper wall panels to lower floor wall panels depending on the floor cassette design and design loads. Upper floor construction (see Figure 5) 18.6 The floor cassettes are lifted onto ground floor wall panels and a sole plate is fixed to the top of the chipboard flooring using two 3.2 mm diameter by 90 mm long nails at 600 mm centres. The first floor corner wall panel is lifted and seated onto the sole plate and the process continues as in the ground floor construction (see sections 18.3 and 18.4).

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Figure 5 Installing floor cassettes and intermediate floor junction detail

Openings — window and door openings 18.7 Panel openings are formed as part of the factory process. Window frames and door sets are installed on site. Small openings for the passing through of pipework can be formed on site, subject to limits approved by the Certificate holder. 18.8 The cutting of openings for the installation of electrical sockets and switches is not approved, instead a service void is provided between the plasterboard lining and the face of the panel for this purpose. Roof construction (see Figure 6) 18.9 For trussed rafters, the trusses/joists are mechanically fixed to the head plate/OSB panel face using truss clips or framing anchors as required by the specialist truss manufacturer/designer. 18.10 For a room-in-the-roof, a chamfered timber plate with the top angled to suit the roof pitch is fixed to the sole plate.

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Figure 6 Typical roof constructions

Separating wall construction 18.11 Separating walls, constructed from two SIPs, are erected in the same manner as for the external walls. A minimum 50 mm wide cavity is provided between the panels, the gap being maintained by use of wall ties.

Technical Investigations

19 Tests Tests were carried out to determine:

racking resistance to BS EN 594 : 1996

vertical loading (axial and eccentric and combined)

transverse loading

tensile strength

compressive strength

shear resistance

pull-out strength of wall ties based on BS DD 140-2 : 1987 and BS EN 846-6 : 2000

fire-resistance to BS EN 1365-1 : 1999.

20 Investigations 20.1 An examination was made of technical data relating to:

structural properties and design calculations

fire testing to BS EN 1365-1 : 1999

thermal modelling

airborne sound insulation tests to BS EN ISO 140-3 : 1995

air leakage tests

condensation analysis.

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20.2 The manufacturing process was evaluated, including the methods adopted for quality control, and details were obtained of the quality and composition of the materials used. 20.3 A visit was made to a site to assess the practicability of installation.

Bibliography BRE Report BR 135 : 2003 Fire performance of external thermal insulation for walls of multistorey buildings BRE Report BR 262 : 2002 Thermal insulation : avoiding risks BRE Report BR 443 : 2006 Conventions for U-value calculations BRE Digest 369 Interstitial condensation and fabric degradation BRE Information Paper IP 1/06 Assessing the effects of thermal bridging at junctions and around openings BS 5250 : 2011 + A1 : 2016 Code of practice for control of condensation in buildings BS 5534 : 2014 + A2 : 2008 Slating and tiling for pitched roofs and vertical cladding. Code of practice. BS 8414-2 : 2005 + A1 : 2017 Fire performance of external cladding systems — Test method for non-loadbearing external cladding systems fixed to and supported by a structural steel frame BS 8417 : 2011 + A1 : 2014 Preservation of wood — Code of practice BS EN 300 : 2006 Oriented Strand Boards (OSB) — Definitions, classification and specifications BS EN 312 : 2010 Particleboards — Specifications BS EN 520 : 2004 + A1 : 2009 Gypsum plasterboards — Definitions, requirements and test methods BS EN 594 : 2011 Timber structures — Test methods — Racking strength and stiffness of timber frame wall panels BS EN 636 : 2012 + A1 : 2015 Plywood— Specifications BS EN 845-1 : 2013 + A1 : 2016 Specification for ancillary components for masonry — Ties, tension straps, hangers and brackets BS EN 846-6 : 2012 Methods of test for ancillary components for masonry — Determination of tensile and compressive load capacity and load displacement characteristics of wall ties (single end test) BS EN 1365-1 : 1999 Fire resistance tests for loadbearing elements — Walls BS EN 1991-1-4 : 2005 + A1 :2010 Eurocode 1: Actions on structures — General actions — Wind actions BS EN 1991-1-7 : 2006 + A1 : 2014 Eurocode 1 : Actions on structures — General actions — Accidental actions BS EN 1995-1-1 : 2004 + A1 : 2008 Eurocode 5: Design of timber structures — General. Common rules and rules for buildings BS EN 1996-1-2 : 2005 Eurocode 6 : Design of masonry structures — General rules — Structural fire design BS EN 1996-2 : 2006 Eurocode 6 : Design of masonry structures — Design considerations, selection of materials and execution of masonry BS EN 1996-3 : 2006 Eurocode 6 : Design of masonry structures — Simplified calculation methods for unreinforced masonry structures BS EN 13163 : 2012 + A2 : 2016 Thermal insulation products for buildings — Factory made products of expanded polystyrene (EPS) — Specification

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BS EN 13501-1 : 2018 Fire classification of construction products and building elements. Classification using test data from reaction to fire tests BS EN 14509 : 2006 Self-supporting double-skin metal faced insulating panels — Factory made products — Specifications BS EN 14509 : 2013 Self-supporting double-skin metal faced insulating panels — Factory made products — Specifications BS EN ISO 140-3 : 1995 Acoustics — Measurement of sound insulation in buildings and of building elements — Laboratory measurement of airborne sound insulation of building elements BS EN ISO 6946 : 2017 Building components and building elements — Thermal resistance and thermal transmittance — Calculation method BS EN ISO 9001 : 2015 Quality management systems — Requirements

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Conditions of Certification

21 Conditions 21.1 This Certificate:

relates only to the product/system that is named and described on the front page

is issued only to the company, firm, organisation or person named on the front page – no other company, firm, organisation or person may hold or claim that this Certificate has been issued to them

is valid only within the UK

has to be read, considered and used as a whole document – it may be misleading and will be incomplete to be selective

is copyright of the BBA

is subject to English Law. 21.2 Publications, documents, specifications, legislation, regulations, standards and the like referenced in this Certificate are those that were current and/or deemed relevant by the BBA at the date of issue or reissue of this Certificate. 21.3 This Certificate will remain valid for an unlimited period provided that the product/system and its manufacture and/or fabrication, including all related and relevant parts and processes thereof:

are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA

continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine

are reviewed by the BBA as and when it considers appropriate. 21.4 The BBA has used due skill, care and diligence in preparing this Certificate, but no warranty is provided. 21.5 In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company, firm, organisation or person, for any matters arising directly or indirectly from:

the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system

the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system

actual installations of the product/system, including their nature, design, methods, performance, workmanship and maintenance

any works and constructions in which the product/system is installed, including their nature, design, methods, performance, workmanship and maintenance

any loss or damage, including personal injury, howsoever caused by the product/system, including its manufacture, supply, installation, use, maintenance and removal

any claims by the manufacturer relating to CE marking. 21.6 Any information relating to the manufacture, supply, installation, use, maintenance and removal of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used, maintained and removed. It does not purport in any way to restate the requirements of the Health and Safety at Work etc. Act 1974, or of any other statutory, common law or other duty which may exist at the date of issue or reissue of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care.

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