Readers are advised to check the validity of this Certificate by either referring to the BBA’s website (www.bbacerts.co.uk) or contactingthe BBA direct (Telephone Hotline 01923 665400).

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

The Secretary of State has agreed with the British Board of Agrémentthe requirements of the Building Regulations to which cavity closers cancontribute in achieving compliance. In the opinion of the BBA, the

Duraframe Cavity Closer System, if used in accordance with the provisions ofthis Certificate, will meet or contribute to meeting the relevant requirements.Requirement: C4 Resistance to weather and ground moisture

Comment: The system prevents the passage of moisture from the outerleaf to the inner leaf of a cavity wall at window or dooropenings. See sections 11.1 and 11.2 of this Certificate.

Requirement: L1 DwellingsRequirement: L2 Buildings other than dwellings

Comment: When the system is used in a reveal or sill, adequateprovision will have been made to limit the thermal bridgingwhich occurs around the opening of which it forms a part.The detail will therefore, contribute to meeting the requirementof limiting the heat loss through the fabric of the building andthe risk of surface condensation will be minimal. Seesection 10.1 of this Certificate.

Requirement: Regulation 7 Materials and workmanship

Comment: The system is acceptable. See section 15 of this Certificate.

Duraflex LtdSevern DriveTewkesbury Business ParkTewkesburyGloucestershire GL20 8TXTel: 08705 351351 Fax: 08700 772663e-mail: info@duraflex.co.ukwebsite: www.duraflex.co.uk

AgrémentCertificate

No 04/4092

Designated by Governmentto issue

European TechnicalApprovals

DURAFRAME CAVITY CLOSER SYSTEMPatron/Elément de remplissageChablone/Hohlraumfüllelement

Product

Regulations• THIS CERTIFICATE RELATESTO THE DURAFRAME CAVITYCLOSER SYSTEM, A PVC-UCAVITY CLOSER ANDWINDOW OR DOORACCEPTOR USED AS ATEMPLATE TO FORM ANOPENING IN MASONRYCAVITY WALLS DURINGCONSTRUCTION.• The system closes the cavityat openings, without forming athermal bridge, and provides adamp-proof barrier betweeninner and outer wall leaves atthe point of closure.• The system is for use inmasonry cavity walls withcavity widths in the range75 mm to 100 mm, allowingPVC-U windows and doors tobe fixed in the reveal.

CI/SfB

(31.9) Hn6

continued

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In addition to the contribution which the system can make to meeting the relevantrequirements, the following comments should be noted:Requirement: A1(1) Loading

Comment: When used in conventional masonry cavity walls, the systemwill not adversely affect the structural stability of the walls. Useof the system does not obviate the need for conventional wallties between the inner and outer leaves at window and dooropenings. Door frames require additional fixings.

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

Comment: The system is acceptable. See sections 12.1 to 12.3 of thisCertificate.

2 The Building Standards (Scotland) Regulations 1990 (as amended)

In the opinion of the BBA, the Duraframe Cavity Closer System if used inaccordance with the provisions of this Certificate, will satisfy orcontribute to satisfying the various Regulations and related Technical

Standards as listed below.Regulation: 10 Fitness of materials and workmanshipStandard: B2.1 Selection and use of materials, fittings, and components, and workmanship

Comment: The system can contribute to a construction meeting thisStandard. See the Installation part of this Certificate.

Standard: B2.2 Selection and use of materials, fittings, and components, and workmanship

Comment: The system is an acceptable material. See section 15 of thisCertificate.

Regulation: 11 StructureStandard: C2.1 Stability

Comment: When used in conventional masonry cavity walls the systemwill not obviate the need for conventional wall ties betweenthe inner and outer leaves at at window and door openings.Door frames require additional fixings.

Regulation: 12 Structural fire precautionsStandard: D2.1 and D2.2 Structural protection — PrinciplesStandard: D6.1 and D6.2 Concealed spaces — Principles

Comment: In conjunction with a cavity barrier, the system can satisfythese Standards. The system does not constitute a cavitybarrier. See sections 12.1 to 12.3 of this Certificate.

Regulation: 17 Resistance to moistureStandard: G3.1 Resistance to precipitation — Resistance to precipitation

Comment: Walls incorporating the system can comply with therequirements of these Standards. See sections 11.1 and 11.2of this Certificate.

Regulation: 18 Resistance to condensationStandard: G4.1 Condensation — Interstitial condensation

Comment: The system can contribute to satisfying this Standard. Seesection 10.3 of this Certificate.

Standard: G4.2 Condensation — Surface condensation

Comment: The system can satisfy this Standard. See section 10.1 of thisCertificate.

Regulation: 22 Conservation of fuel and powerStandard: J4.1 Buildings in purpose group 1 — Limiting thermal bridging at junctions and

around openingsStandard: J9.1 Buildings in purpose groups 2 to 7 — Limiting thermal bridging at junctions and

around openings

Comment: Walls incorporating the system can satisfy these Standards.See section 10.1 of this Certificate.

3 The Building Regulations (Northern Ireland) 2000

In the opinion of the BBA, the position of the Duraframe Cavity CloserSystem, if used in accordance with the provisions of this Certificate, willsatisfy or contribute to satisfying the various Building Regulations listed

below.Regulation: B2 Fitness of materials and workmanship

Comment: The system is acceptable. See section 15 of this Certificate.Regulation: C4 Resistance to ground moisture and weather

Comment: Walls incorporating the system can contribute to meeting thisRegulation. The sub-frame can be used where checked revealsare required. See sections 11.1 and 11.2 of this Certificate.

Regulation: C5 Condensation

Comment: The system can satisfy this Regulation. See section 10.3 of thisCertificate.

continued

• Door frames must be fixedindependently to the masonry.Proprietary fixings which maybe recommended by themanufacturer for this purposeare outside the scope of thisCertificate.• It is essential that the systemis installed and used inaccordance with the conditionsset out in the Design Data andInstallation parts of thisCertificate.

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Regulation: D1 Stability

Comment: When used in conventional masonry cavity walls, the systemwill not obviate the need for conventional wall ties betweenthe inner and outer leaves at around window and dooropenings. Door frames require additional fixings.

Regulation: E4 Internal fire spread — Structure

Comment: The system is acceptable. See sections 12.1 to 12.3 of thisCertificate.

Regulation: F2 Building Fabric

Comment: When the system is used in a reveal or sill, adequateprovision will have been made to limit the thermal bridgingwhich occurs around the opening of which it forms a part. Thedetail can therefore contribute to meeting the requirements tomake reasonable provisions in the fabric of the building for theconservation of fuel and power. See section 10.1 of thisCertificate.

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4 Construction (Design and Management) Regulations 1994 (as amended)Construction (Design and Management) Regulations (Northern Ireland)1995 (as amended)

In the opinion of the BBA there is no information in this Certificate which relatesto the obligations of the client, planning supervisor, designer and contractorsunder these Regulations.

Technical Specification

5 Description5.1 The Duraframe Cavity Closer System (seeFigure 1) is an unplasticised polyvinyl chloride(PVC-U) cavity closer and window sub-frame, usedto form an opening in masonry cavity walls duringconstruction. It is made from extruded profiles formedinto a U-shape template, with welded or mechanicallyjoined (using corner brackets) corners at the sill anda temporary cross brace fixed at the head (one thirdof the closer height from the top), to be removedprior to the installation of the window/door frames.

5.2 The main PVC-U profile incorporates a boxsection to fit into the wall cavity.

5.3 The cavity closer profiles are produced byconventional extrusion techniques from virgin orreground PVC-U material. The plasterboard andwindow board adaptor profile sections areproduced from virgin PVC-U material. The virginmaterial has previously been assessed by the BBAand comply with Case B (PVC-U with additionalpolymers) as defined in MOAT No 17 : 1990.

5.4 Polypropylene mortar ties, manufactured bystandard injection moulding techniques, are usedto build the cavity closer into the surrounding mortarjoints (see Figures 2 and 3).

5.5 The system can be used in a checked revealconstruction.

5.6 Windows and doors are fitted into thesub-frame from the outside of the building exceptin checked reveal constructions, when they arefitted from the inside of the building.

5.7 The use of the system eliminates the needfor fitting a conventional vertical or horizontaldamp-proof course to the window or dooropening.

5.8 The sub-frame cavity closer components andaccessories are listed in Table 1 and shown inFigure 2.

5.9 Sub-frames are manufactured to suit thebrick aperture. A 5 mm clearance per side isallowed between the sub-frame and window ordoor, in accordance with the DuraframeFabrication Guide.

5.10 Tests are carried out to monitor the qualityof the extrusions and checks to control thefabrication of the system.

5.11 The welding of corners for a sub-framecavity closer must be carried out by a fabricatorapproved for this purpose by the BBA.

5.12 The maximum sub-frame cavity closer sizetested by the BBA for windows is 2400 mm wideby 1400 mm high. Door frame sizes have notbeen assessed by the BBA as they requireadditional proprietary fixings outside the scope ofthis Certificate.

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Figure 1 Mechanical joint details

pan head screw size 3.6 mm x 18 mm (stainless)

100 mm closerView in direction of arrow A

75 mm closerView in direction of arrow A

100 mm closerView through X

75 mm closerview through X

A

X X

*25 mm

*25 mm

13.5 mm 13.5 mm

38 mm

38 mm

9100 corner bracket

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Figure 2 Components

100 mm cavity 75 mm cavity

9001 9071

9002 9072

9073

90749004

9003

9103snapper

9102brick tie

9100mechanical joint corner bracket

9109foam

9110foam

PO1161 (90 mm)PO1608 (150 mm)

9101cross brace bracket

9106cross brace

P3684 (150 mm) 3682plasterboard adapter

3655window board adapter

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Figure 3 Typical jamb with window detail

*

cavity closer

foam seal

outside

silicone seal

silicone seal

plaster

*

silicone seal

plaster

cavity closer

outside

silicone seal

check reveal

30 mm

5 mm

5 mm

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Figure 4 Typical sill with window detail

silicone sealsealant (low modulus)

cavity closer

dabs

plaster

sealant (low modulus)

cavity closer

silicone seal

dabs

plaster

check reveal

30 mm

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Table 1 List of components

Manufacturer’s Components Applicationdesignation

9001 Cavity closer/sub-frame jamb and sill/threshold 100 mm cavity (11.5 mm insert)

9002 Cavity closer/sub-frame jamb and sill/threshold 100 mmcavity (36.5 insert)

9003 Cavity closer/sub-frame jamb and sill/threshold 100 mmcavity (flat)

9004 Cavity closer/sub-frame jamb and sill/threshold 100 mmcavity (check reveal)

9071 Cavity closer/sub-frame jamb and sill/threshold 75 mmcavity (11.5 mm insert)

9072 Cavity closer/sub-frame jamb and sill/threshold 75 mmcavity (36.5 mm insert)

9073 Cavity closer/sub-frame jamb and sill/threshold 75 mmcavity (flat)

9074 Cavity closer/sub-frame jamb and sill/threshold 75 mmcavity (check reveal)

9102 Brick tie cavity closer brickwork tie

9100 Corner bracket for mechanically joiningcavity closer sub-frame

9109 Foam insulation core for central chamber of cavitycloser

9110 Foam insulation core for either side of centralchamber of cavity closer

9103 Snapper for securing window outerframe to jambs and sill ofcavity closer sub-frame

P01161 Fixing lug 90 mm fixing lug for securing window outer frame (65 mm window system) at the head of section

P01608 Fixing lug 150 mm fixing lug for securing window outerframe (65 mm system) atthe head section

P3684 Fixing lug 150 mm fixing lug for securing window outerframe (70 mm system) atthe head section

3682 — plasterboard adaptor

3655 — window board adaptor

9101 Cross brace bracket head support bracket

9106 Cross brace head support batten

— Stainless steel screws snapper fixing screws(3.9 mm diameter 25 mm countersunk head)

— Stainless steel screws mechanical joints fixing screws(3.6 mm diameter 18 mm pan head)

FAS 009 stainless steel screws cross brace bracket fixing screws(4.8 mm diameter25 mm countersunk head)

6 Delivery to site and storage6.1 Assembled sub-frames are labelled withsystem identification and the BBA identificationmark incorporating the number of this Certificate.They are dispatched with the requisite number ofmortar ties, any additional ancillary items andinstallation instructions.

6.2 The pre-assembled sub-frames are stackedvertically and delivered as individual items, taking

care to avoid distortion in transit. The sub-framesshould be stored under cover in a clean area, onedge, and suitably supported to avoid distortion ordamage. The sub-frames should be protected fromvehicular and pedestrian traffic.

Design Data

7 General7.1 The Duraframe Cavity Closer System issuitable for use in masonry walls with cavity widthsin the range 75 mm to 100 mm and with windowframes made from PVC-U. Windows must have anouter frame design suitable for correct fitting of thesnappers, serrated fixing clips, or alternativelythrough fixing can be used. The Certificate holderwill advise on the suitability of outer frame profiles.

7.2 The system provides an effective means ofclosing a cavity without creating a thermal bridge;a separate vertical damp-proof course is notrequired, nor is it necessary to cut bricks or blocks.The window is fitted after completion of themasonry. It can also be used to form a checkedreveal where required and to fit the window aftercompletion of the masonry, as is conventionalpractice in Scotland and Northern Ireland.

7.3 The system can be used as a template, toform an opening, around which a wall can beconstructed.

7.4 All internal reveals and sills should beappropriately finished (see section 10.1).

8 Practicability of installationInstallation of the system is straightforward and canbe carried out by tradesmen using traditional skills.

9 Structural stability9.1 The system must not be used to support loadsfrom the masonry nor does it replace the need forcavity wall ties. Lintels are required above windowor door openings.

9.2 The system will not have an adverse effect onthe structural stability of brickwork or blockworkwalls, constructed in the conventional manner inaccordance with normal good practice as definedin BS 5628-3 : 2001.

9.3 A window fitted correctly into a cavity frame,using snappers at the jambs (with additionalthrough fixing in the middle of jambs for side-hungopening lights) and sill and conventional fixing lugsat the head, will satisfactorily transfer to thestructure wind loads likely to be encountered in theUK. In terms of wind loading resistance the cavityframe can be used in all areas of the UK.

9.4 The alternative method of window framefixing using lugs, or through fixing into the masonry,provides similar resistance to wind loading to thatdescribed in 9.3.

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9.5 Door frames for use with the cavity framerequire additional proprietary fixings at the jambsand sill/threshold to ensure that the frame remainsfirmly fixed when the door is slammed. Headfixings may be required for larger doorsets.Reference should be made to the relevantinstallation procedures described in the DuraframeFabrication Guide.

10 Hygrothermal behaviour10.1 Thermal bridging and the risk of localsurface condensation around openings willbe acceptable, and meet the following

requirements, where:• the window or door frame is set back 30 mm or

more into the wall cavity• the junctions between the walls and the front and

back of the window/door frame are sealed• walls incorporate cavity wall insulation, or walls

with no cavity wall insulation incorporate aconventional reveal finish with a thermalresistance of at least 0.08 m2KW–1, eglightweight plaster or MDF.

England and WalesApproved Document L1, paragraphs 1.30 and1.32Approved Document L2, paragraphs 1.9 and1.11

ScotlandTechnical Standards J4.1 and J9.1

Northern IrelandTechnical Booklet F, paragraph 1.33 andparagraph 1.34.

10.2 For constructions not covered bysection 10.1, an assessment can be carried out bycomputer simulation in accordance with BREInformation Paper IP 17/01 Assessing the effectsof thermal bridging at junctions and aroundopenings.

10.3 Under normal domestic conditionsthe level of interstitial condensationassociated with the system will be low

and the risk of any resultant damage minimal.

10.4 For door frame installations whereproprietary through fixings are used, the framecannot be set back in the cavity by 30 mm andtherefore additional thermal insulation should beconsidered, for example by using insulated drylining, to minimise the risk of condensation andexcessive additional heat loss at the reveal.

11 Weather resistance11.1 The system is effective as a verticaldamp-proof barrier at jambs of window anddoor openings in masonry constructions,

where a brick/block closer and dpc detail wouldnormally be used. The system is also effective as ahorizontal damp-proof barrier at the sill orthreshold.

11.2 The system may also be used to constructa check reveal (see Figures 3 and 4). In thisconstruction, in which the frame is positioned in arebate behind the outer leaf of the jamb, thesystem is suitable for use in exposure categoriesup to and including ‘very severe’ as defined inTable 11 of BS 5628-3 : 2001 which covers allexposure zones in the United Kingdom.

12 Properties in relation to fire12.1 The installed system will not contributesignificantly to the growth of a fire.

12.2 The system does not constitute a cavitybarrier against the penetration of smoke and flamein the context of the Building Regulations. This doesnot prevent its use in England and Wales and inNorthern Ireland where cavity barriers are notrequired around openings. In Scotland, however,the system is only suitable for use in conjunctionwith a cavity barrier meeting the performancerequirements defined in Technical Standard (D1.3),Table 1.

12.3 The use of the system does not preclude theneed to provide suitable fire protection to steellintels where this is necessary to satisfy the BuildingRegulations.

13 Security against intrusionRemoval of a window from the cavity closer fromoutside is virtually impossible as the shape of theouter frame prevents access to the snappers. Ifrequired, for any reason, supplementary throughfixing of the window frame is possible. The doorframes which are secured by lugs or through fixingsaround the perimeter are outside the scope of thisCertificate.

14 MaintenanceTo ensure the maximum weathertightness, thesilicone seal to the external window joint must bechecked regularly and repairs or renewal carriedout promptly.

15 DurabilityThe system is formed from materials shown tobe durable and, protected within the cavity,will not suffer significant degradation. The

system will last the normal expected life of abuilding. Visible components will have an expectedlife similar to a PVC-U window.

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Installation

16 General16.1 Installation of the system must be carried outin accordance with the Duraframe FabricationGuide.

16.2 Reference should be made to the typicalinstallation details shown in Figures 3 and 4 whenreading the installation details given in section 17.The windows in these figures are shown forinformation only and do not form part of thisassessment.

16.3 At the build-in stage it must be ensured thatthe sub-frame remains plumb, level, square, andwith parallel sides.

17 Procedure17.1 The sub-frame is supplied to site as acomplete frame with the joints between the jambsand sill sections welded together or mechanicallyjointed using the corner brackets and cross bracefixed in place at the head. The sub-frame is readyfor building into the construction of cavity wallsusing traditional building methods.

17.2 The cavity wall is built to the sill level,ensuring that the coursework is level, flat, and thatall excess mortar is removed.

17.3 The cavity closer/sub-frame is positioned inthe cavity with the plaster stop, if available, in thecorrect position relative to the cavity, so that theinner surface of the window frame is set in at least30 mm from the inner surface of the outer leaf. Thecloser frame is aligned with a spirit level. Thecourse work is built up by one course and butted toone side of the sub-frame.

17.4 The position of the sub-frame is checked andthe coursework on the opposite side of the sub-frame is built up by one level.

17.5 Brick ties are inserted into the channel of thesub-frame jambs, rotated through 90º and built intothe mortar bed joints. These ties should be fittedafter the first brick and then at 300 mm centres.The ties should be inserted alternately, tying thesub-frame into both inner and outer courses. Aminimum of three ties per vertical member isrequired.

17.6 The lintel is set and bedded in position.

17.7 The cross brace and cross brace bracketsare removed before the windows are installed.

17.8 In all installations the top brick courseshould be arranged to ensure that, when beddedin, the lintel does not exert a load on the windowframe/sub-frame.

17.9 The sub-frame is cleaned to ensure that it isfree from mortar. The brickwork must be allowedto set before attempting to fit the window.

Window preparation and fitting17.10 The fitting of windows to the sub-framemust be carried out in accordance with theDuraframe Fabrication Guide.

17.11 The correct window is selected to suit thesub-frame. All protective wrapping is removed.

17.12 Snappers are screw fixed to the outerframe jambs and sill (see Figures 3 and 4)100 mm from each corner, behind eachmullion/transom and at centres not exceeding600 mm. A minimum of two clips per member isrequired.

17.13 A bead of silicone sealant is applied tothe upstand, where available, of the sub-frame.

17.14 The window is offered up to the sub-frame,positioning it squarely in the aperture and clippedinto place by applying even pressure to positionthe window back against the sub-frame flange(where available). The head member of thewindow is secured using lugs or screw fixingspositioned not less than 150 mm from the cornersand at centres not exceeding 600 mm.

17.15 Alternatively, window frames used with thesystem may be conventionally fixed by lug orthrough fixing into the masonry.

Finishing17.16 A bead of silicone sealant is appliedaround the perimeter of the window internally priorto plastering.

17.17 Dry lining or lightweight plaster (seesection 10.1) is used for internal plastering aroundwindow reveals.

17.18 Finishing trims are fitted after completion ofthe window installation, where required.

17.19 The window is weather-proofed externally,using a suitable low modulus silicone sealant.

Technical Investigations

The following is a summary of the technicalinvestigations carried out on the Duraframe CavityCloser System.

18 Tests18.1 Confirmatory tests were carried out inaccordance with MOAT No 8 : 1973 andMOAT No 17 : 1990 on PVC-U extrusions madefrom reground material, to determine:• Vicat softening temperature• shrinkage on heating• verification of gelation by heating• ash content

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• induction time of dehydrochlorination• elastic modulus• tensile strength.

18.2 Tests were carried out in accordance withthe methods defined in MOAT No 1 : 1974, on acombined sub-frame and PVC-U window, installedin a test rig, to determine:• air permeability• watertightness• effect of cyclic wind loads to ±1250 Pa• effect of temperature variation (–5°C to 55°C)

on resistance to wind loading• resistance to wind loads of +1700 Pa,

–2800 Pa (safety test).

19 InvestigationsAn assessment was made of:• durability of the components used in the

construction of the system• weathertightness of the system when installed in

accordance with the manufacturer’s instructions• fire resistance and structural stability of walls

incorporating the frame acceptor• an assessment was made of the hygrothermal

properties of constructions incorporating thesystem. In making this assessment, reference wasmade, as appropriate, to the RobustConstruction Details(1) and BRE InformationPaper IP 12/94 Assessing condensation riskand heat loss at thermal bridges aroundopenings.

• the manufacture and quality control of theextruded profiles and sub-frame fabricationprocedures.

(1) Limiting thermal bridging and air leakage : Robustconstruction details for dwellings and similar buildings,TSO 2002.

Bibliography

BS 5628-3 : 2001 Code of practice for use ofmasonry — Materials and components, design andworkmanship

MOAT No 1 : 1974 Directive for the Assessmentof Windows

MOAT No 8 : 1973 UEAtc Directive for RigidPVC Products used externally in Building

MOAT No 17 : 1990 UEAtc Technical Guide forthe Agrément of windows in PVC-U

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Conditions of Certification

20 Conditions20.1 This Certificate:(a) relates only to the product that is described,installed, used and maintained as set out in thisCertificate;(b) is granted only to the company, firm or personidentified on the front cover — no other company,firm or person may hold or claim any entitlement tothis Certificate;(c) is valid only within the UK;(d) has to be read, considered and used as awhole document — it may be misleading and willbe incomplete to be selective;(e) is copyright of the BBA;(f) is subject to English law.

20.2 References in this Certificate to any Act ofParliament, Regulation made thereunder, Directiveor Regulation of the European Union, StatutoryInstrument, Code of Practice, British Standard,manufacturers’ instructions or similar publication,are references to such publication in the form inwhich it was current at the date of this Certificate.

20.3 This Certificate will remain valid for anunlimited period provided that the product and themanufacture and/or fabrication including allrelated and relevant processes thereof:(a) are maintained at or above the levels whichhave been assessed and found to be satisfactoryby the BBA;

(b) continue to be checked as and when deemedappropriate by the BBA under arrangements that itwill determine; and(c) are reviewed by the BBA as and when itconsiders appropriate.

20.4 In granting this Certificate, the BBA is notresponsible for:(a) the presence or absence of any patent orsimilar rights subsisting in the product or any otherproduct;(b) the right of the Certificate holder to market,supply, install or maintain the product; and(c) the nature or standard of individualinstallations of the product or any maintenancethereto, including methods and workmanship.

20.5 Any recommendations relating to the use orinstallation of this product which are contained orreferred to in this Certificate are the minimumstandards required to be met when the product isused. They do not purport in any way to restate therequirements of the Health & Safety at Work etcAct 1974, or of any other statutory, common lawor other duty which may exist at the date of thisCertificate or in the future; nor is conformity withsuch recommendations to be taken as satisfying therequirements of the 1974 Act or of any present orfuture statutory, common law or other duty of care.In granting this Certificate, the BBA does notaccept responsibility to any person or body for anyloss or damage, including personal injury, arisingas a direct or indirect result of the installation anduse of this product.

In the opinion of the British Board of Agrément, the Duraframe Cavity Closer System is fit for itsintended use provided it is installed, used and maintained as set out in this Certificate.Certificate No 04/4092 is accordingly awarded to Duraflex Ltd.

On behalf of the British Board of Agrément

Date of issue: 26th March 2004 Chief Executive

British Board of AgrémentP O Box No 195, Bucknalls LaneGarston, Watford, Herts WD25 9BAFax: 01923 665301

©2004For technical or additional information,contact the Certificate holder (seefront page).For information about the AgrémentCertificate, including validity andscope, tel: Hotline 01923 665400,or check the BBA website.

e-mail: mail@bba.star.co.ukwebsite: www.bbacerts.co.uk

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