The BBA has awarded this Agrément Certificate to the company named above for the product describedherein. This product has been assessed by the BBA as being fit for its intended use provided it is installed, usedand maintained as set out in this Certificate.

On behalf of the British Board of Agrément

Date of First issue: 23 October 2008 Chris Hunt Greg CooperOriginally certificated on 6 June 1994 Head of Approvals — Physics Chief ExecutiveCertificate amended on 29 October 2009 with a change to the product title and Building Regulation references.

TECHNICAL APPROVALS FOR CONSTRUCTION

APPROVAL

INSPECTION

TESTING

CERTIFICATION

Excel Industries LtdMaerdy Industrial Estate (South)RhymneyGwent NP22 5PYTel: 01685 845 200 Fax: 01685 844 106e-mail: neil.turner@excelfibre.comwebsite: www.excelindustries.com

Agrément Certificate94/3027

Product Sheet 1

WARMCEL 500 — STUD WALL INSULATION

EXCEL INDUSTRIES‘ RECYCLED CELLULOSE INSULATION FOR TIMBER-FRAME DWELLINGS

British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: mail@bba.star.co.ukHerts WD25 9BA website: www.bbacerts.co.uk©2008

PRODUCT SCOPE AND SUMMARY OF CERTIFICATE

The BBA is a UKAS accredited certification body — Number 113. The schedule of the current scope of accreditation for product certification isavailable 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.

Page 1 of 12

This Certificate relates to Warmcel 500 — Stud WallInsulation, a cellulose fibre insulation blown in loose formor damp-sprayed, for use in walls of normal timber framedwellings and in other timber-frame constructionsincorporating a vapour control layer or in ‘breathingwall’ constructions where layers either side of theinsulation have appropriate relative vapour resistances.AGRÉMENT 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 ASSESSEDThermal performance — the product can enable a building to achieve the requirement of national carbon emission rates. Thedeclared thermal conductivity (�90/90 value) of the product is 0.040 W·m–1·K–1 (see section 5).Condensation and hygrothermal characteristics — installation must not be carried out until the moisture content of the timberframe is less than 20% (see section 6).Behaviour in relation to fire — the product does not prejudice the fire-resistance properties of the wall (see section 7).Durability — the design life of the product under typical UK conditions has been considered and the product will remaineffective as an insulant for the life of the building (see section 11).Environmental information — the source and quantity of recycled material for the product has been verified by the BBA (seesection 16).

In the opinion of the BBA, Warmcel 500 — Stud Wall Insulation, if used in accordance with the provisions of thisCertificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:

The Building Regulations 2000 (as amended) (England and Wales)

Requirement: B3(1) Internal fire spread (structure)

Comment: Walls incorporating the product can meet this Requirement. See section 7.5 of this Certificate. Requirement: C2(b) Resistance to moisture

Comment: Walls incorporating the product can meet this Requirement. See sections 6.2 to 6.4 of this Certificate.Requirement: L1(a)(i) Conservation of fuel and power

Comment: Walls incorporating the product can contribute to a building meeting this Requirement. See sections 5.2,5.3, 5.5 and 5.6 of this Certificate.

Requirement: Regulation 7 Materials and workmanship

Comment: The product is an acceptable material. See section 11.1 and the Installation part of this Certificate.

The Building (Scotland) Regulations 2004 (as amended)

Regulation: 8(1)(2) Fitness and durability of materials and workmanship

Comment: The product can contribute to a construction meeting this Regulation. See sections 10 and 11.1 and theInstallation part of this Certificate.

Regulation: 9 Building standards — constructionStandard: 2.6 Spread to neighbouring buildings

Comment: Walls incorporating the product can satisfy this Standard, with reference to clause 2.6.1(1)(2). See section7.5 of this Certificate.

Standard: 3.15 Condensation

Comment: The product can contribute to satisfying this Standard, with reference to clauses 3.15.1(1), 3.15.4(1) and3.15.5(1). See sections 6.2 to 6.6 of this Certificate.

Standard: 6.1(b) Carbon dioxide emissionsStandard: 6.2 Building insulation envelope

Comment: The product can contribute to satisfying clauses, or parts of, 6.1.2(1), 6.1.3(2), 6.1.6(1), 6.2.1(1), 6.2.3(1),

6.2.4(2), 6.2.6(2), 6.2.7(1)(2), 6.2.12(1)(2) and 6.2.13(1)(2) of these Standards. See sections 5.2, 5.3, 5.5and 5.6 of this Certificate.(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

The Building Regulations (Northern Ireland) 2000 (as amended)

Regulation: B2 Fitness of materials and workmanship

Comment: The product is an acceptable material. See section 11.1 and the Installation part of this Certificate.Regulation: B3(2) Suitability of certain materials

Comment: The product is acceptable. See section 10 of this Certificate.Regulation: C5 Condensation

Comment: A wall incorporating the product can satisfy this Regulation. See section 6.2 to 6.6 of this Certificate.Regulation: E4(1) Internal fire spread — Structure

Comment: Walls incorporating the product can satisfy this Regulation. See section 7.5 of this Certificate.Regulation: F2(a)(i) Conservation measures

Comment: Walls incorporating the product can satisfy or contribute to satisfying this Regulation. See sections 5.2,5.3, 5.5 and 5.6 of this Certificate.

Regulation: F3 Target carbon dioxide Emissions Rate

Comment: The product can contribute to a building satisfying its Target Emission Rate. See section 5.2, 5.3, 5.5and 5.6 of this Certificate.

Construction (Design and Management) Regulations 2007Construction (Design and Management) Regulations (Northern Ireland) 2007

Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address theirobligations under these Regulations.See section: 2 Delivery and site handling (2.2).

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Regulations

Page 3 of 12

Non-regulatory Information

NHBC Standards 2008NHBC accepts the use of Warmcel 500 — Stud Wall Insulation, when installed and used in accordance with thisCertificate, in relation to NHBC Standards, Chapter 6.2 External timber framed walls.

GeneralThis Certificate relates to Warmcel 500 — Stud Wall Insulation, a cellulose fibre insulation blown in loose form ordamp-sprayed. The product is installed between studding in walls of normal timber frame dwellings with a weather-resistant cladding and a ventilated and drained cavity between the cladding and the timber frame.

It can be used in conventional timber-frame constructions incorporating a vapour control layer or in ‘breathing wall’constructions where layers either side of the insulation have appropriate relative vapour resistances.

Technical Specification

1 Description1.1 Warmcel 500 — Stud Wall Insulation cellulose fibre insulation is manufactured in accordance with BS 5803-3 :1985. It comprises recycled newsprint and inorganic flame retardants. It has an installed density of between 40 kg·m–3

and 65 kg·m–3.

1.2 The insulation is applied by either injection into the void after the internal lining has been applied or damp-spraying with a small amount of water before fixing the internal lining.

1.3 Lining boards specified for use with this system have not been assessed by the BBA and are not covered by thisCertificate.

2 Delivery and site handling2.1 The insulation is delivered to site in sealed plastic bags weighing approximately 12 kg. Each bag carries a labelbearing the manufacturer’s name, product name, type of material and the BBA identification mark incorporating thenumber of this Certificate.

2.2 Bags must be kept dry and unopened until ready for use.

Assessment and Technical Investigations

The following is a summary of the assessment and technical investigations carried out on Warmcel 500 — Stud WallInsulation.

Design Considerations

3 General3.1 When installed, Warmcel 500 — Stud Wall Insulation is effective in reducing the U value (thermal transmittance)of external walls of timber-frame dwellings. It is essential that such walls are designed and constructed to incorporatethe normal precautions against moisture ingress.

3.2 New buildings subject to the national Building Regulations should be designed in accordance with the relevantrecommendations of BS 5268-2 : 2002 and BS 5268-6.1 : 1996.

3.3 Where the construction incorporates a masonry outer leaf (masonry includes clay and calcium silicate bricks,concrete blocks, natural and reconstituted stone blocks) which should be in accordance with BS 5628-3 : 2005 orBS 5390 : 1976, the designed cavity width should be 50 mm and at no point should the cavity widths be less than35 mm(1).(1) A residual cavity nominally 50 mm wide will be required by the NHBC where normal standards of tolerance and workmanship are adopted.

3.4 Where the construction has an outer cladding of rendering, slates or tiles, timber or plastic weatherboarding, orother form of cladding, a 19 mm minimum cavity width must be maintained between the cladding and the timberframe sheathing. A vapour control layer on the warm side of the insulation is likely to be required in this type ofconstruction.

3.5 It is essential that proper care and attention is given to maintaining the integrity/continuity of vapour control layers(see section 12 of this Certificate).

3.6 De-rating of any electrical cables in areas where the insulation restricts the flow of air should be considered.

4 Practicability of installationThe product can be installed easily by operatives experienced with this type of product (see section 12.1).

5 Thermal performance5.1 Calculations of the thermal transmittance (U value) of specific external wall constructions should be carried out inaccordance with BS EN ISO 6946 : 1997 and BRE(1) report (BR 443 : 2006) Conventions for U-value calculations,using the declared thermal conductivity (� 90/90 value) of 0.04 W·m–2·K–1 for the insulation. Example U values that maybe achieved with typical timber-frame construction [based on 38 mm thick timbers at 600 mm centres, BR443 (15%timber fraction)] comprising 102 mm brick outer leaf, 50 mm cavity (ventilated) and inner leafs as shown in the figures(b) and (c) in section 6.7, are given in Table 1.

(1) Building Research Establishment.

5.2 The product can contribute to achieving the following design U values:

England and Wales and Northern Ireland• 0.35 W·m–2·K–1 required for ‘notional’ dwellings in SAP 2005 and buildings other than dwellings in SBEM• 0.35 W·m–2·K–1 limit average specified in Approved Documents L1A, Table 2, and L2A, Table 4, and Technical

Booklets F1, Table 2.2, and F2, Table 2.4• 0.70 W·m–2·K–1 limit for an individual element specified in Approved Documents L1A, Table 2, and L2A, Table 4,

and, Technical Booklets F1, Table 2.2, and F2, Table 2.4.Scotland• 0.20 W·m–2·K–1 required for the ‘simplified approach — solid fuel package 6’ ’’notional’ dwelling in Mandatory

Standard 6.1, clause 6.1.6(1) (see also section 5.3)• 0.25 W·m–2·K–1 required for ‘notional’ dwellings in SAP 2005 (for Scotland) and the ‘simplified approach —

packages 1 to 5’ in Mandatory Standard 6.1, clause 6.1.6(1)

• 0.27 W·m–2·K–1 maximum U value for building elements of the insulation envelope for extensions or reconstructionsof elements in Mandatory Standard 6.2, clauses 6.2.9(1), 6.2.10(2), 6.2.11(1) and 6.2.12(2)

• 0.30 W·m–2·K–1 limit average specified in Mandatory Standard 6.2, clause 6.2.1(1)(2)

• 0.70 W·m–2·K–1 limit for an individual element specified in Mandatory Standard 6.2, clauses 6.2.1(1)(2), 6.2.9(1)

and 6.2.10(2).(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

5.3 Walls with U values lower than (or the same as, for Scottish dwellings) the relevant ‘notional’ value as specified insection 5.2 will contribute to a building meeting its target overall reduction in carbon dioxide emissions of about 20%(or 18% to 25% in Scotland) for dwellings and 23% to 28% for buildings other than dwellings. Walls with higherU values will require additional energy saving measures in the building envelope and/or services.

5.4 The dynamic performance of a structure can be determined by the admittance procedure given in the CIBSEGuide A : 2006 Environmental design, Chapter 5 Thermal response and plant sizing.

5.5 Compliance with the guidance referred to in section 5.3 will allow the use of the default psi values fromBRE Information Paper IP 1/06 Assessing the effects of thermal bridging at junctions and around openings,Table 3 and The Government’s Standard Assessment Procedure for Energy Rating of Dwellings (SAP 2005),

Table K1, in Target Emission Rate calculations to SAP 2005 or the Simplified Building Energy Model (SBEM).

5.6 The product can maintain, or contribute to maintaining, continuity of thermal insulation at junctions between theexternal wall and the other building elements. Guidance in this respect, and on limiting heat loss by air infiltration, canbe found in:

England and Wales — Limiting thermal bridging and air leakage : Robust construction details for dwellings and similarbuildings TSO 2002Scotland — Accredited Construction Details (Scotland)Northern Ireland — Accredited Construction Details (version 1.0).

6 Condensation and hygrothermal characteristics6.1 Installation must not be carried out until the moisture content of the timber frame is less than 20%.

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Table 1 Wall U values

Studding depth (mm) Type U value (W·m–2·K–1)

170 Masonite stud 0.24

200 Masonite stud 0.20

89 Timber 0.42

140 Solid timber 0.30

Surface condensation 6.2 Walls will limit the risk of surface condensation adequately when the thermal transmittance (U value) doesnot exceed 0.7 W·m–2·K–1 at any point, and the junctions with other elements are designed in accordance withthe relevant requirements of TSO 2002 or BRE Information Paper IP 1/06.

6.3 Walls will adequately limit the risk of surface condensation when the thermal transmittance (U value) does notexceed 1.2 W·m–2·K–1 at any point. Guidance may be obtained from BS 5250 : 2002, Section 8, and BRE report(BR 262: 2002) Thermal insulation : avoiding risks.

Interstitial condensation 6.4 Walls incorporating the product will adequately limit the risk of interstitial condensation when they aredesigned and constructed in accordance with BS 5250 : 2002, Section 8 and Annex D.

Standard timber panel 6.5 When incorporating a vapour control layer between the studding and the internal lining board, it can beshown from calculations that typical constructions will not suffer from harmful levels of condensation.

Breathing wall construction 6.6 It can be shown from calculations that it is feasible to design constructions that rely on the relative vapourresistances of the materials on either side of the insulation, to prevent harmful levels of condensation within the structure.It is essential, however, that due provision is made for drainage of the cavity, for ventilation at high and low levels, andover openings. Equivalent minimum open areas of one open perpend per 1.5 m run of wall are recommended.

6.7 An assessment of the risk of interstitial condensation within the structures shown in Figure 1 (including two coats ofDrywall Sealer) has been carried out using the methods described in BS 5250 : 2002. An assessment was made ofmoisture formed within the structures under adverse conditions of temperature and humidity. The data obtained indicatethat the constructions will not be adversely affected. Other constructions should be analysed in accordance withBS 5250 : 2002 to determine the risk of interstitial condensation and hence its suitability.

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Figure 1 Wall cross-section(1)

(1) Vapour resistance of the lining on the warm side of the insulation normally should be not less than five times that of the lining on the cold side.(2) Plasterboard or equivalent gypsum board of appropriate water-vapour resistance.(3) Complying with BS 5803-3 : 1985.

25 mm 38 mm battens(forming a service void)

�

6.4 mm Paneline

(a) Masonite stud

with service void(b) Masonite stud

600 mm

Warmcel 500insulation(3)

12.5 mmgypsum-basedinternal lining(2)

(c) Standard timber stud

89 mm 38 mm timber stud�

Bitvent 15or Panelventsheathing

150 mm or 170 mmMasonite stud(comprising47 mm 47 mmflanges and 8 mm web)

�

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7 Behaviour in relation to fire7.1 The product contains inorganic fire retardants which inhibit flaming and smouldering combustion.

7.2 In the context of this Certificate, the use of the product does not prejudice the fire-resistance properties of the wall.

7.3 When properly installed, the insulation will be contained within the cavity sheathing and internal lining board untilthese layers are destroyed. Therefore, the insulation will not contribute to the development stages of a fire or present asmoke or toxic hazard.

7.4 Loadbearing timber stud partitions were tested for fire resistance in accordance with BS 476-21 : 1987 andachieved the ratings given in Table 2. The partitions comprised:• 89 mm by 38 mm timber studs at 600 mm centres with noggings at a height of 2.4 m. The unexposed face was

covered in 9.5 mm thick sheathing grade plywood. The core was filled with the insulation and covered with a0.125 mm thick (500 gauge) polythene vapour control layer and 12.5 mm thick taper-edge plasterboard fixedover.

• Masonite studs 200 mm deep by 47 mm wide with 8 mm thick web of K40 Masonite. Each stud was fixed at 600mm centres between horizontally orientated Masonite studs at the head and an 8 mm thick K40 Masonite board atthe bottom and additional horizontal Masonite stud as the sole plate. The exposed face was covered by two layersof 12.5 mm thick plasterboard. The core was filled with insulation and the unexposed face covered with 9.2 mmthick Panelvent.

7.5 The constructions detailed in section 7.4 of this Certificate will meet the requirements for a minimum periodof fire resistance of 30 minutes and 60 minutes respectively in accordance with:

England and Wales — Approved Document B, Table A2Scotland — Annex 2B, Table 2BNorthern Ireland — Technical Booklet E, Table 3.2.

8 Proximity of flues and appliancesWhen installing the product in close proximity to certain flue pipes and/or heat-producing appliances, the followingprovisions to the national Building Regulations are acceptable:

England and Wales — Approved Document JScotland — Mandatory Standard 3.19, with reference to clauses 3.19.1(1)(2) to 3.19.9(1)(2)

(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

Northern Ireland — Technical Booklet L.

9 Weathertightness9.1 Constructions incorporating the products and built in accordance with BS 5268-6.2 : 2001 will resist ingress ofmoisture and satisfy the national Building Regulations:

England and Wales — Requirement C2 (b)(c)Scotland — Mandatory Standard 3.10, clause 3.10.5(1)(2)

(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

Northern Ireland — Regulation C4.

9.2 The use of the product does not alter the normal requirements for a moisture resistant breather membrane inappropriate specifications and situations.

9.3 Ventilation and weep holes should be designed or protected to prevent the ingress of rain.

Table 2 Fire resistance test results

Wall Test panel Loadbearing Integrity Insulationconstruction dimensions capacity

(mm) (mins) (mins) (mins)

(a) 3000 x 3000 x 111 39(1) 39(1) 39(1)

(b) 2400 x 3000 x 205 71 71 71(1) Test terminated.

10 MaintenanceAs the product is confined within the wall cavity and it has suitable durability (see section 11), maintenance isnot required.

11 Durability11.1 The product contains an inorganic biocide to protect it from attack by micro-organisms and, provided itdoes not become accidentally wetted, may be expected to remain effective as an insulant for a period in orderof 60 years.

11.2 Should settlement occur after initial installation, it will be minimal and is not expected to significantly affect thethermal performance of the wall in which it is installed. When spray-applied, settlement is not expected.

Installation

12 General12.1 The spray or injection scrim technique is preferred as disturbances to linings are minimised. For NHBCStandards, only techniques that do not damage the linings may be used.

Approved installers12.2 Installation of the Warmcel 500 — Stud Wall Insulation is carried out by the Certificate holder, or an approvedinstaller, being a company which:• is required to satisfy an initial site installation check by the BBA prior to approval by the Certificate holder and is

subject to the BBA Surveillance Scheme• is approved by the Certificate holder and the BBA to install the product• has undertaken to comply with the Certificate holder’s installation procedure• is employing technicians who have been issued with appropriate identity cards by the Certificate holder; at least

one member of each installation team must carry a card• is subject to supervision by the Certificate holder, including unannounced site inspections.

Supervision12.3 Installation should be carried out in accordance with the BBA Surveillance Scheme and the relevant requirementsof the Warmcel Installation Manual Timber Frame Walls and Sloping Ceilings.12.4 During installation, as an aid to determining that the installation conforms to the certificated method, checks canbe made to ensure that injection of the material follows the method described in sections 13.6 to 13.8.

13 ProcedureSpray13.1 Stud faces are checked for projections and all surfaces to be protected are masked.

13.2 The pre-wetted product is sprayed from a distance of about 1 m to 1.5 m starting from the bottom, working upand building up to thickness in layers.

13.3 When completed, a rotary stud scrubber is run over the wall to remove surplus material and leave a flush finish.Surplus material can be recycled.

13.4 The lining may be applied within 24 hours except in abnormal drying conditions.

Injection13.5 All stud/nogging locations are identified by drawings or stud locators and holes marked out in either thesheathing board or plasterboard lining to ensure all cavities are filled.

13.6 Injection is made through a 25 mm diameter hole made using a hole-cutter and the core is retained for makingthe hole good, using silicone sealant or gypsum-based adhesive as appropriate. For a normal 2.4 m high wall withstuds at 0.6 m centres, three holes are required at heights of 0.2 m, 1.2 m and 2.2 m from the floor.

13.7 The upper holes are temporarily blocked to prevent fibre escape, the nozzle inserted into the lower hole andinsulation blown until the machine stalls.

13.8 When accessing cavities lined with a gypsum fibreboard, a single circular piece is cut near the top of the cavitylarge enough to accept the 50 mm diameter hose and 106 mm diameter Turbofill gun (see Figure 2) and cut at 45degrees with a jigsaw to facilitate its reinstatement with a suitable gypsum-based adhesive. The hose is inserted into thecavity to within 200 mm of the bottom and filling proceeds until the fibre flow rate slows. The hose is withdrawn about200 mm until the flow rate slows again; the process continues until the cavity is full.

Page 7 of 12

13.9 Any damage to a breather or control layer must be made good.

Injection — scrim 13.10 Where the internal lining panel has yet to be fitted, a scrim sheet may be used to close the cavity and allowinjection. The scrim is cut to length and stapled to the stud and intermediate noggings, ensuring the scrim is kept astight as possible. The adjacent scrim layer should overlap the first by approximately 150 mm; taping is not necessary.

13.11 Injection proceeds as described in section 13.8.

13.12 To finish, the internal lining is fitted over the scrim.

Factory filling — panels 13.13 Panels can be filled and lined in the factory using the Excel TurboFill machine. This Certificate does not coverthe use of these panels.

Technical Investigations

14 TestsTests were carried out on Warmcell 500 — Stud Wall Insulation to determine thermal conductivity and to assess theproduct’s characteristics.

15 Investigations15.1 The manufacturing process was examined, including the methods adopted for quality control, and details wereobtained of the quality and composition of the materials used.

15.2 A visit was made to a site in progress to establish the practicability of installation.

15.3 An examination was made of independent data relating to:• conformity to BS 5268-3 (6.2) : 2001• � value• settlement under vibration• settlement under high humidity• condensation risk analysis• hygrothermal testing (trial wall)• fire resistance to BS 476-21 : 1987.

15.4 Independent reports on the behaviour and performance of breathing wall constructions were examined inrespect of hygrothermal performance.

15.5 A theoretical analysis of the hygrothermal behaviour of various installations was carried out.

16 Environmental information16.1 The recycled content has been calculated in accordance with the Waste & Resources Action Programme(WRAP), ‘Rules of Thumb’ Guide to the Calculation and Declaration of Recycled Content in Construction Products. SeeTable 3 for details.

Page 8 of 12

Figure 2 TurboFill gun

16.2 The recycled input material is described as recycled newspaper from post-consumer sources and meets criteria Aand B for a recycled material as defined in WRAP.

Bibliography

BS 476-21 : 1987 Fire tests on building materials and structures — Methods for determination of the fire resistance ofloadbearing elements of construction

BS 5250 : 2002 Code of practice for control of condensation in buildings

BS 5268-2 : 2002 Structural use of timber — Code of practice for permissible stress design, materials andworkmanshipBS 5268-6.1 : 1988 Structural use of timber — Code of practice for timber frame walls — Dwellings not exceedingthree storeysBS 5268-6.2 : 2001 Structural use of timber — Code of practice for timber frame walls — Buildings other thandwellings not exceeding four storeys

BS 5628-3 : 2005 Code of practice for the use of masonry — Materials and components, design and workmanship

BS 5803-1 : 1985 Thermal insulation for use in pitched roof spaces in dwellings — Specification for man-mademineral fibre thermal insulation mats

BS EN ISO 6946 : 1997 Building components and building elements — Thermal resistance and thermal transmittance— Calculation method

BS EN ISO 14021 : 2001 Environmental labels and declarations — Self declared environmental claims (Type 2environmental labelling)

Page 9 of 12

Table 3 Recycled content

Recycled input Input mass per tonne of Yield factor(2) Recycledmaterial product(1) (tonnes) (%) content(3) (%)

Newsprint 0.80 95% 76

Notes(1) Input mass per tonne of recycled material is verified by the BBA as part of

post-Certification auditing and calculated in accordance with BS EN ISO14021: 2001, Clause 7.8.4.

(2) Yield factor is an estimated allowance for the moisture content of paper. Itis not measured as part of the manufacturing process and does not formpart of the BBA post-Certification auditing.

(3) Recycled content in the final product minus the estimated moisture content.

Conditions of Certification

17 Conditions17.1 This Certificate:• relates only to the product/system that is named and described on the front page• is granted only to the company, firm or person named on the front page — no other company, firm or person may

hold or claim any entitlement to this Certificate• 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.

17.2 References in this Certificate to any Act of Parliament, Statutory Instrument, Directive or Regulation of theEuropean Union, British, European or International Standard, Code of Practice, manufacturers’ instructions or similarpublication, are references to such publication in the form in which it was current at the date of this Certificate.

17.3 This Certificate will remain valid for an unlimited period provided that the product/system and the manufactureand/or fabrication including all related and relevant 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.

17.4 In granting this Certificate, the BBA is not responsible for:• 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• individual installations of the product/system, including the nature, design, methods and workmanship of or related

to the installation• the actual works in which the product/system is installed, used and maintained, including the nature, design,

methods and workmanship of such works.

17.5 Any information relating to the manufacture, supply, installation, use and maintenance of this product/systemwhich is contained or referred to in this Certificate is the minimum required to be met when the product/system ismanufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements ofthe Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at thedate of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not acceptresponsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirectresult of the manufacture, supply, installation, use and maintenance of this product/system.

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British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: mail@bba.star.co.ukHerts WD25 9BA website: www.bbacerts.co.uk©2008

Page 1 of 12

TECHNICAL APPROVALS FOR CONSTRUCTION

APPROVAL

INSPECTION

TESTING

CERTIFICATION

Excel Industries LtdMaerdy Industrial Estate (South)RhymneyGwent NP22 5PYTel: 01685 845200 Fax: 01685 844106e-mail: neil.turner@excelfibre.comwebsite: www.excelfibre.com

British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: mail@bba.star.co.ukHerts WD25 9BA website: www.bbacerts.co.uk©2009

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.

EXCEL INDUSTRIES’ RECYCLED CELLULOSE INSULATION FOR TIMBER-FRAME DWELLINGS

WARMCEL 500 — PITCHED ROOF INSULATION

PRODUCT SCOPE AND SUMMARY OF CERTIFICATE

This Certificate relates to Warmcel 500 — Pitched Roof Insulation, a cellulose fibre insulation blown in loose form for use in timber pitched roofs with rafters with a depth of at least 220 mm. The product is blown in loose form between the plasterboard and the breather membrane.

AGRÉMENT 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 ASSESSEDEnvironmental information — the product has been the subject of an Environmental Profile Certificate and the recycled content has been verified by the BBA (see section 3).Practicability of installation — the product is to be installed by trained installers using the approved blowing machine (see section 5).Thermal performance — the product has a declared thermal conductivity value of 0.040 W·m–1·K–1 (see section 6).Condensation — the product can limit the risk of condensation. It has a water vapour resistance factor (µ) = 2 (EN 12524 : 2000) and must be used in conjunction with an effective vapour control layer (see section 7). Behaviour in relation to fire — the product is classified class E to BS EN 13501-1: 2002, but will be contained within the ceiling lining and the breather membrane (see section 8). Durability — the product will remain effective as an insulant for the life of the building (see section 11).

Agrément Certificate94/3027

Product Sheet 2

The BBA has awarded this Agrément Certificate to the company named above for the product described herein. This product 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 First issue: 7 December 2009 Chris Hunt Greg Cooper

Head of Approvals — Physics Chief Executive

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In the opinion of the BBA, Warmcel 500 — Pitched Roof Insulation, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:

The Building Regulations 2000 (as amended) (England and Wales)

Requirement: C2(c) Resistance to moisture

Comment: The product can contribute to meeting this Requirement. See sections 7.2 and 7.4 of this Certificate.Requirement: L1(a)(i) Conservation of fuel and power

Comment: The product can contribute to a building meeting its Target Emission Rate. See sections 6.2 to 6.5 of this Certificate.

Requirement: Regulation 7 Materials and workmanship

Comment: The product is acceptable. See section 11 and the Installation part of this Certificate.

The Building (Scotland) Regulations 2004 (as amended)

Regulation: 8(1) Fitness and durability of materials and workmanship

Comment: The product can contribute to a construction meeting this Regulation. See section 11 and the Installation part of this Certificate.

Regulation: 9 Building standards — constructionStandard: 3.15 Condensation

Comment: The product can contribute to satisfying this Standard, with reference to clauses 3.15.1(1), 3.15.3(1). See sections 7.3 and 7.4 of this Certificate.

Standard: 6.1(a)(b) Carbon dioxide emissionsStandard: 6.2 Building insulation envelope

Comment: The product can contribute to satisfying clauses, or parts of, 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 these Standards. See sections 6.2 to 6.5 of this Certificate.

Regulation: 12 Building standards — conversions

Comment: All comments given for this product under Regulation 9, also apply to this Regulation, with reference to clause 0.12.1(1) and Schedule 6(1).

(1) Technical Handbook (Domestic).

The Building Regulations (Northern Ireland) 2000 (as amended)

Regulation: B2 Fitness of materials and workmanship

Comment: The product is an acceptable material. See section 11 and the Installation part of this Certificate.Regulation: C5 Condensation

Comment: Pitched roofs incorporating the product can satisfy this Regulation. See section 7.4 of this Certificate.Regulation: F2(a)(i) Conservation measuresRegulation: F3 Target carbon dioxide Emission Rate

Comment: Pitched roofs incorporating the product can contribute to satisfying these Regulations. See sections 6.2 to 6.5 of this Certificate.

Construction (Design and Management) Regulations 2007Construction (Design and Management) Regulations (Northern Ireland) 2007

Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligations under these Regulations.See section: 2 Delivery and site handling (2.1).

Non-regulatory Information

NHBC Standards 2008NHBC accepts the use of Warmcel 500 — Pitched Roof Insulation, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 7.2 Pitched roofs, Clauses D10–D11.

GeneralThis Certificate relates to Warmcel 500 — Pitched Roof Insulation, a cellulose fibre insulation blown in loose form between rafters of 220 mm to 400 mm in depth at 400 mm or 600 mm centres, enclosed by the breather membrane. Either solid rafters or I-beams are used.

Regulations

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Technical Specification

1 Description1.1 Warmcel 500 — Pitched Roof Insulation, a cellulose fibre insulation, is manufactured in accordance with BS 5803-3 : 1985. It comprises recycled newsprint and inorganic fire retardants. It has an installed density of from 45 to 55 (± 5%) kg·m–3.

1.2 The product is for use in pitched roof constructions where the ceiling follows the pitch of the roof and encloses a habitable space.

1.3 The product is blown in the void created between the breather membrane (the advice of the Certificate holder may be sought for alternatives) and the sacrificial ply board (6 mm thick).

1.4 Ancillary items used but outside the scope of this Certificate include:• vapour control layer• roof tile underlay/breather membrane with small elongation value• pre-treated counter battens, softwood battens• 6 mm thick ply sheet (sacrificial board)• butyl nail sealing tape• tile battens• roofing slates or tiles.

2 Delivery and site handling2.1 The product is delivered to site in sealed plastic bags weighing approximately 13 kg. Each bag carries a label bearing the manufacturer’s name, product name, type of material and the BBA identification mark incorporating the number of this Certificate.

2.2 Bags must be kept dry and unopened until ready for use.

3 Environmental information3.1 The environmental profile for the product has been calculated using the BRE Environmental Profiles Methodology and an Environmental Profile Certificate has been awarded by BRE, Certificate No 278 (Appendix 278a only) dated 2 December 2008, achieving the following:• an Eco-point score Cradle to Gate per tonne of product, of 1.68• an Eco-point score Cradle to Grave per m2 of Warmcel 500 damp spray over a 60-year study period, of 0.03.

3.2. The recycled content has been calculated in accordance with the Waste & Resources Action Programme (WRAP) Rules of Thumb Guide to the Calculation and Declaration of Recycled Content in Construction Products (see Table 1).

Table 1 Recycled content

Recycled input material Input mass per tonne of product (tonne)(1) Yield factor (%)(2) Recycled content (%)(3)

Recycled newsprint 0.80 95 76

(1) Input mass per tonne of recycled material is verified by the BBA as part of post-Certification auditing and calculated in accordance with BS EN ISO 14021: 2001, Clause 7.8.4.

(2) Yield factor is an estimated allowance for the moisture content of paper. It is not measured as part of the manufacturing process and does not form part of the BBA post-Certification auditing.

(3) Recycled content in the final product minus the estimated moisture content.

3.3 The recycled input material is described as recycled newspaper from post-consumer sources and meets criteria A and B for a recycled material as defined in WRAP.

Assessment and Technical InvestigationsThe following is a summary of the assessment and technical investigations carried out on Warmcel 500 — Pitched Roof Insulation.

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Design Considerations

4 General4.1 When installed, Warmcel 500 — Pitched Roof Insulation is effective in reducing the thermal transmittance (U value) of pitched roofs of existing dwellings. It is essential that such roofs are designed and constructed to incorporate the normal precautions against moisture ingress.

4.2 Installation must not be carried out until the moisture content of the timber frame is less than 20%.

4.3 The product is suitable for use between, the rafters in conjunction with approved (BBA or equivalent) breathable membrane and vapour control layer, timber counter battens and tiling battens in tiled or slated, pitched roofs, designed and constructed in accordance with the relevant Clauses of BS 5534 : 2003 for dwellings or other buildings with similar temperature and humidity conditions.

4.4 New buildings subject to the national Building Regulations should be designed in accordance with the relevant recommendations of BS 5268-2 : 2002.

4.5 It is essential that proper care and attention is given to maintaining the integrity/continuity of vapour control layers, see section 13.

4.6 De-rating of any electrical cables in areas where the product restricts the flow of air should be considered.

5 Practicability of installation The product should only be installed by installers who have been trained and approved by the Certificate holder. The records relating to this will be audited by the BBA as part of its programme of surveillance on the Certificate, see section 12.

6 Thermal performance6.1 Calculations of the thermal transmittance (U value) of specific roof constructions should be carried out in accordance with BS EN ISO 6946 : 2007 and BRE report (BR 443 : 2006) Conventions for U-value calculations, using the declared thermal conductivity (�90/90 value) 0.040 W·m–1·K–1 of the product. Example U values (based on 220 mm solid and I-beam rafters at 400 mm or 600 mm centres, BR 443) are given in Table 2.

Table 2 U values for typical roof constructions

Construction U value (W·m–2·K–1)

Solid(1) rafters at 400 mm centres 0.22

Solid rafters at 600 mm centres 0.20

Masonite I-beam(2) at 400 mm centres 0.19

Masonite I-beam at 600 mm centres 0.18

(1) Solid rafters are at 400 mm (12.5%) or 600 mm (8.3%) centres.(2) I-beam rafters are at 400 mm (11.75%) or 600 mm (7.83%) centres and the

I-beam consists of 47 mm by 47 mm flanges and 8 mm web, made of wood.

6.2 The product can contribute to achieving the design U values shown in Tables 3 and 4.

6.3 Roofs with U values lower than (or the same as for Scottish dwellings) the relevant ‘notional’ value as specified in section 6.2 will contribute to a building meeting its target overall reduction in carbon dioxide emissions of about 20% (or 18% to 25% in Scotland) for dwellings and 23% to 28% for buildings other than dwellings. Walls with higher U values will require additional energy saving measures in the building envelope and/or services.

6.4 The product can maintain or contribute to maintaining continuity of thermal insulation at junctions between the external wall and the other building elements. Guidance in this respect, and on limiting heat loss by air infiltration, can be found in: England and Wales — Limiting thermal bridging and air leakage: Robust construction details for dwellings and similar buildings TSO 2002 and Accredited Construction Details, version 1.0Scotland — Accredited Construction Details (Scotland). Northern Ireland — Accredited Construction Details (version 1.0). 6.5 Compliance with the guidance referred to in section 6.4 will allow the use of the default psi values from BRE Information Paper IP 1/06 Assessing the effects of thermal bridging at junctions and around openings, Table 3, and The Government’s Standard Assessment Procedure for Energy Rating of Dwellings (SAP 2005), Table K1, in Target Emission Rate calculations to SAP 2005 or the Simplified Building Energy Model (SBEM).

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Table 3 Typical design U values for pitched roofs — England and Wales, and Northern Ireland

Construction type U value (W·m–2·K–1)

‘Notional’ mean in SAP and new dwellingsLimit mean for extensions, new and replacement elements,Limit mean for renovated, retained elements and material change of use(1) or energy status(2)

Limit mean for domestic extensions(1) and new dwellingsLimit individual for domestic extensions(1) and new domestic

0.160.200.200.250.35

(1) Alternative or flexible approaches are given in the relevant documents supporting the national Building Regulations.(2) England and Wales only.

Table 4 Typical design U values for pitched roofs — Scotland

Construction type U value (W·m–2·K–1)

Limit mean for new dwellings simplified approach (all fuel packages) and notional dwellings in SAPLimit mean for new domesticLimit individual element valueLimit mean for conversions, extensions and alterations(1)

0.160.200.200.35

(1) Alternative or flexible approaches are given in the relevant documents supporting the national Building Regulations.

7 Condensation 7.1 The product has a water vapour resistance factor (µ) = 2 (EN 12524 : 2000).

Surface condensation 7.2 Roofs will adequately limit the risk of surface condensation when the thermal transmittance (U value) does not exceed 0.35 W·m–2·K–1 at any point and the junctions with walls are designed in accordance with the relevant requirements of Limiting thermal bridging and air leakage : Robust construction details for dwellings and

similar buildings TSO 2002, or BRE Information Paper IP 1/06.

7.3 Roofs will adequately limit the risk of surface condensation when the thermal transmittance (U value) does not exceed 1.2 W·m–2·K–1 at any point. Guidance may be obtained from BS 5250 : 2002, Section 8, and BRE Report (BR 262 : 2002) Thermal insulation : avoiding risks.

Interstitial condensation 7.4 Roofs incorporating the product (as shown in Figure 1) will adequately limit the risk of interstitial condensation when designed and constructed in accordance with BS 5250 : 2002, Section 8.4 and Appendix D.

Figure 1 Roof cross-section

Warmcel 500 full fillbetween 220 x 45 mmtimber rafters

slate or tile roof finish on25 mm battens and 50 mmcounter battens overbreathable membrane

plasterboard

vapour control layer

services batten

6 mm sacrificial board

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7.5 The risk of interstitial condensation is greatest when the building is drying out after construction. Guidance on preventing condensation from this and other sources is given in BRE Digest 369 Interstitial condensation and fabric degradation and BRE report (BR 262 : 2002).

7.6 The pitched roof construction must always contain a vapour control layer with an equivalent air layer thickness Sd = 50 (to EN 12524 : 2000).

8 Behaviour in relation to fire 8.1 The product contains inorganic fire-retardants which inhibit flaming and smouldering combustion.

8.2 The product has a fire classification rating Class E for reaction to fire, containing flame-retardant additive, in accordance with BS EN 13501-1 : 2002.

8.3 When installed, the product will be contained between the breather membrane and the plasterboard until these layers are destroyed. Therefore, the product will not contribute to the development stages of a fire or present a smoke or toxic hazard.

8.4 The continuity of fire resistance must be maintained as described in:England and Wales –– Approved Document B, paragraphs 5.11 and 5.12Scotland –– Mandatory Standard 2.2, clauses 2.2.7(2) and 2.2.10(1).(1) Technical Handbook (Domestic).

(2) Technical Handbook (Non-Domestic).

Northern Ireland –– Technical Booklet E, Table 3.2.1

9 Proximity of flues and appliances When the product is installed in close proximity to certain flue pipes and/or heat-producing appliances, for buildings subject to national Building Regulations, the relevant provisions and guidance given below should be met: England and Wales –– Approved Document J Scotland –– Mandatory Standard 3.19, clauses 3.19.1(1)(2) to 3.19.9(1)(2)

(1) Technical Handbook (Domestic).

(2) Technical Handbook (Non-Domestic).

Northern Ireland –– Technical Booklet L.

10 MaintenanceAs the product is confined within the boards and it has suitable durability (see section 11), maintenance is not required.

11 DurabilityThe product contains an inorganic biocide to protect it from attack by micro-organisms and, provided it does not become accidentally wetted, may be expected to remain effective as an insulant for a life equivalent to that of the roof structure.

Installation12 General12.1 Installation of Warmcel 500 — Pitched Roof Insulation is to be carried out in accordance with the relevant requirements of the Warmcel Installation Manual Timber Frame Walls and Sloping Ceilings.

12.2 For NHBC Standards, only techniques that do not damage the linings may be used in order to minimise disturbances to the linings.

13 Procedure 13.1 Rafter depth to be used can be from 220 mm to 400 mm for I-beam rafters and a depth of 220 mm for solid rafters.

13.2 A sacrificial timber board (minimum thickness of 6 mm) is nailed to the underside of the rafters (see Figure 1).

13.3 The breathable roof tile underlay is pulled taut and fixed over the rafters.

13.4 The breather membrane should be covered by a BBA Certificate, with preferably a low elongation value to minimise on bulging, and used with a butyl nail sealing tape. For advice on using alternative membranes and nail sealing tapes, the Certificate holder should be consulted.

13.5 The silicon backing paper is removed from the butyl tape and glued to the underside of the counter battens (50 mm deep) as shown in Figure 2.

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13.6 The counter battens with the taped side are nailed onto the breathable roof tile underlay into the rafter.

13.7 The nail sealing tapes are used to seal the holes at the nails entrance(1).

(1) Details are given in the Certificate holder’s instruction manual.

13.8 The tile battens (25 mm deep) are fixed onto the counter battens.

13.9 The cellulose fibres are blown by dry injection in between the sacrificial board and the breather membrane by the method detailed in sections 13.12 to 13.17. The filling can be undertaken by the eaves or the ridge.

13.10 To avoid water running towards the rafters and cause rotting, it must be ensured that the breathable roof tile underlay does not bulge upwards or has as little bulging as possible. To minimise the risk of this happening, the holes around the nails should be sealed with the appropriate sealing tapes as described in section 13.5.

13.11 The VCL is stapled and battened down onto the underside of the sacrificial board.

Dry injection method13.12 A lance is normally used for dry injecting the insulation into pitched roofs and can be carried out in one of three ways:

Method 1

• at the eaves — preferred access in sloping roof sections is via the eaves or from the horizontal loft area above the sloping section at the ridge (if this exists), so that the sacrificial board is not disturbed (see Figure 3).

Figure 2 Installation of breathable membrane and counter battens

(1) breathable membrane fixed torafters with staples, and kept taut

(2) nail sealer tape fixed to counterbatten after removing backingpaper

(3) counter batten (sealer tape presseddirectly against membrane) fixedto rafter

(4) tile battens fixed to counterbattens; slates or tiles fixedto tile battens

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Method 2

• at the ridge — blowing can be carried out from the ridge by temporarily removing the sacrificial board and replacing it by a scrim below the rafters. A hole is drilled in the scrim for each void between rafters. Once the product has been blown in completely, the board is replaced.

Method 3

• access holes are drilled through the sacrificial board near to the top edge of the rafter void (see Figure 4).

13.13 If the blowing hose is used without a lance to insulate fully enclosed panels, the core cutter diameter should be 15 mm to 25 mm larger than the diameter of the hose. This allows the hose to be easily fed in and allows air to escape past the hose while the void is being filled.

13.14 Ideally, the blowing machine should be mounted in a high top van or box trailer, so that it need not be removed for every job.

13.15 An 85 mm—106 mm long hole cutter is used and the core retained for making the hole good, using silicone sealant or adhesive as appropriate. One hole is required per section (ridge to eaves).

13.16 The hose or lance is inserted into the void to within 200 mm of the end of the rafter void and filling proceeds until the fibre flow rate slows. The hose is withdrawn about 200 mm until the flow rate slows again; the process continues until the void is full.

13.17 Any accidental damage to a roof tile underlay or vapour control layer must be made good.

Figure 4 Hose application — ridge to eaves

Figure 3 Lance application — eaves to ridge

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Technical Investigations

14 Investigations14.1 The manufacturing process of Warmcel 500 — Pitched Roof Insulation was examined, including the methods adopted for quality control, and details were obtained of the quality and composition of the materials used.

14.2 A visit was made to a site in progress to establish the practicability of installation.

14.3 An examination was made of independent data relating to:

• � value • settlement under vibration • settlement under high humidity

• condensation risk analysis.

BibliographyBS 5250 : 2002 Code of practice for control of condensation in buildings

BS 5268-2 : 2002 Structural use of timber — Code of practice for permissible stress design, materials and workmanship

BS 5534 : 2003 Code of practice for slating and tiling (including shingles)

BS 5803-3 : 1985 Thermal insulation for use in pitched roof spaces in dwellings — Specification for cellulose fibre thermal insulation for application by blowing

BS EN 13501-1 : 2002 Fire classification of construction products and building elements. Classification using test data from reaction to fire tests

BS EN ISO 6946 : 2007 Building components and building elements — Thermal resistance and thermal transmittance — Calculation method

BS EN ISO 14021 : 2001 Environmental labels and declarations — Self declared environmental claims (Type II environmental labelling)

EN 12524 : 2000 Building materials and products — Hygrothermal properties — Tabulated design values

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Conditions of Certification

15 Conditions15.1 This Certificate:• relates only to the product/system that is named and described on the front page• is granted only to the company, firm or person named on the front page — no other company, firm or person may

hold or claim any entitlement to this Certificate• 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.

15.2 Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers’ instructions; or any other publication or document similar or related to the aforementioned.

15.3 This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant 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.

15.4 In granting this Certificate, the BBA is not responsible for:• 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• individual installations of the product/system, including the nature, design, methods and workmanship of or related

to the installation• the actual works in which the product/system is installed, used and maintained, including the nature, design,

methods and workmanship of such works.

15.5 Any information relating to the manufacture, supply, installation, use and maintenance 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 and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date 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. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system.

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British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: mail@bba.star.co.ukHerts WD25 9BA website: www.bbacerts.co.uk©2009