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 aspects of performance to be used by the BBA in assessing thecompliance of external wall insulation with the Building Regulations. In

the opinion of the BBA, Envirowall External Wall Insulation Systems, if used inaccordance with the provisions of this Certificate, will meet or contribute tomeeting the relevant requirements.Requirement: B4(1) External fire spread

Comment: The systems are classified Class 0 and therefore can meet thisRequirement. See the relevant tinted areas in the Properties inrelation to fire section of these Front Sheets.

Requirement: C2(c) Resistance to moisture

Comment: Walls insulated with the systems will meet this Requirement.See the relevant tinted area in the General section of theseFront Sheets.

Requirement: L1(a)(i) DwellingsRequirement: L2(a) Buildings other than dwellings

Comment: The systems will enable, or contribute to enabling, a wall tomeet the U value requirement. See the tinted areas in theThermal insulation section of these Front Sheets.

Requirement: Regulation 7 Materials and workmanship

Comment: The systems are acceptable. See the tinted area in theDurability section of these Front Sheets.

Envirowall LimitedOrchard HouseAire Valley Business CentreKeighleyYorkshire BD21 3DUTel: 01535 661633 Fax: 01535 661933e-mail: info@envirowall.co.ukwebsite: www.envirowall.co.uk

AgrémentCertificate

No 05/4206

Designated by Governmentto issue

European TechnicalApprovals

ENVIROWALL EXTERNAL WALL INSULATION SYSTEMSSystème d’isolation pour murs extérieursWärmedämmung für Außen-wand

Product

Regulations — Detail Sheet 1• THIS CERTIFICATE RELATESTO ENVIROWALL EXTERNALWALL INSULATION SYSTEMS.• The systems compriseinsulation material withreinforcement and renderfinishes as described in theaccompanying Detail Sheets.• The systems are applied tothe outside of external walls ofmasonry or dense concreteconstruction and are suitable foruse on new or existing buildings.• Application and maintenancemust be carried out strictly inaccordance with the DesignData and Installation parts ofthis Certificate and themarketing company’sinstructions by operativestrained and approved by theCertificate holder.

CI/SfB

(21.9) Rn7 (M2)

continued

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2 The Building (Scotland) Regulations 2004 In the opinion of the BBA, Envirowall External Wall Insulation Systems, ifused in accordance with the provisions of this Certificate, will satisfy orcontribute to satisfying the various Regulations and related Mandatory

Standards as listed below.Regulation: 8 Fitness and durability of materials and workmanshipRegulation: 8(1) Fitness and durability of materials and workmanship

Comment: The systems can contribute to a construction satisfying thisRegulation. See the tinted area in the Durability section andthe Installation part of this Certificate.

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

Comment: The systems have a ‘low risk’ surface classification. Thesystems incorporate insulation which would not be classed as‘non-combustible’. Completed walls would therefore beregarded as unprotected areas as defined in Clause 2.6.2(1)(2)

and 2.6.4(1)(2) of this Standard. Other relevant Clauses are2.6.1(1)(2), 2.6.3(1)(2), 2.6.5(1) and 2.6.6(2). See the tintedarea (7.1) in the Properties in relation to fire section of theseFront Sheets.

Standard: 2.7 Spread on external walls

Comment: The systems incorporate insulation which would not be classedas ‘non-combustible’ and, therefore, should not be used onwalls one metre or less from a boundary [Clauses 2.7.1(1)(2)

and 2.7.2(2)] but see the relevant tinted area in the Propertiesin relation to fire section of these Front Sheets.

Standard: 3.10 Precipitation

Comment: Walls insulated with the systems will contribute to aconstruction satisfying Clause 3.10.1(1)(2) of this Standard. Seethe relevant tinted area (6.4) in the General section of theseFront Sheets.

Standard: 3.15 Condensation

Comment: Walls insulated with the systems will satisfy the requirements ofClauses 3.15.1(1), 3.15.3(1) and 3.15.4(1) of this Standard.See the relevant tinted area (6.6) in the General section andthe Risk of interstitial condensation section of these Front Sheets.

Standard: 6.2 Buildings insulation envelope

Comment: The systems will enable, or contribute to enabling, a wall tomeet Clauses 6.2.0(1)(2), 6.2.4(1)(2) and 6.2.5(2) of thisStandard. See the tinted areas in the Thermal insulationsection of these Front Sheets.(1) Technical Handbook (Domestic)

(2) Technical Handbook (Non-Domestic)

3 The Building Regulations (Northern Ireland) 2000In the opinion of the BBA, Envirowall External Wall Insulation Systems, ifused in accordance with the provisions of this Certificate, will satisfy orcontribute to satisfying the various Building Regulations as listed below.

Regulation: B2 Fitness of materials and workmanship

Comment: The systems are acceptable. See the tinted area in theDurability section of these Front Sheets.

Regulation: C4 Resistance to ground moisture and weather

Comment: Walls insulated with the systems will satisfy this Regulation.See the relevant tinted area (6.4) in the General section ofthese Front Sheets.

Regulation: C5 Condensation

Comment: Walls insulated with the systems will satisfy the requirements ofthis Regulation. See the relevant tinted area (6.6) in theGeneral section and the Risk of interstitial condensationsection of these Front Sheets.

Regulation: E5 External fire spread

Comment: The systems have a Class 0 surface and can satisfy thisRegulation. See the relevant tinted area in the Properties inrelation to fire section of these Front Sheets.

Regulation: F2 Building fabric

Comment: The systems will enable, or contribute to enabling, a wall tomeet this Regulation. See the tinted areas in the Thermalinsulation section of these Front Sheets.

continued

• The systems are marketed bythe Certificate holder.• The system components areobtained from manufacturersapproved by the Certificateholder and the BBA.

These Front Sheets must be readin conjunction with the relevantaccompanying Detail Sheets,which provide information specificto insulation systems.

Technical Specification

5 Delivery and site storage5.1 Components of Envirowall External WallInsulation Systems are delivered to site in thepackaging and quantities as listed in Table 1.

5.2 The insulation should be stored on a firm,clean, level base, off the ground and under coveruntil required for use.

5.3 The expanded polystyrene and phenolicinsulation must be protected from prolongedexposure to sunlight either by storing opened packsunder cover or re-covering with opaque polythenesheeting.

Table 1 Component supply details

Component Quantity and packaging

Insulation wrapped in plastic filmEnviroMesh 1 m wide rollBasecoats/dash receiver/Brickrend 25 kg bagGrand Silicon Render KR/Granol KR 25 kg tubMechanical fixings boxed by manufacturer

5.4 Care must be taken when handling theinsulation boards to avoid both damage andcontact with solvents or bitumen products. Theboards must not be exposed to open flame or otherignition sources.

5.5 The basecoat, dash receiver and Brickrendmust be stored in dry conditions, off the ground,and protected from moisture.

Design Data

6 General6.1 Envirowall External Wall Insulation Systems,are effective in reducing the thermal transmittance(U value) of the walls of new and existingbuildings. It is essential that the detailing techniquesspecified in this Certificate are carried out to a highstandard if the ingress of water into the insulation isto be avoided and the full thermal benefit obtainedfrom treatment with the systems.

6.2 The systems will improve the weatherresistance of a wall and provide a decorative finish.However, they may only be installed where thereare no signs of dampness on the inner surface of thewall other than those caused solely by condensation.

6.3 Existing buildings, subject to national BuildingRegulations, should have wall surfaces in accordancewith the relevant sections of the Detail Sheets.

6.4 New buildings, subject to nationalBuilding Regulations, should be constructedin accordance with the relevant

recommendations of:• BS 5628-3 : 2001. In particular Clause 5.5.2

of the Code of Practice Rain penetration shouldbe followed in that the designer should select aconstruction appropriate to the local wind-drivenrain index, paying due regard to the designdetailing, workmanship and materials to be used

• BS 8000-3 : 2001.

6.5 Other new buildings, not subject to any of theprevious requirements, should also be built inaccordance with BS 5628-3 : 2001.

6.6 When using the system, considerationmust be given to the overall design tominimise the risk of condensation and the

recommendations of BS 5250 : 2002 should befollowed.

7 Properties in relation to fire7.1 The external surfaces of the systems areclassified as Class 0 or ‘low risk’ as definedin the documents supporting the national

Building Regulations. The systems may therefore beused in accordance with the provisions of:England and WalesApproved Document B, paragraph 13.5ScotlandMandatory Standard 2.6Northern IrelandTechnical Booklet E, paragraph 4.3.

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

Information in this Certificate may assist the client, planning supervisor,designer and contractors to address their obligations under these Regulations.See section: 5 Delivery and site storage (5.1 and 5.4) of these Front

Sheets.

7.2 To limit the risk of fire spread betweenfloors in building subject to the BuildingRegulations in England and Wales, fire

barriers should be installed at each floor levelabove the first floor level (ie starting with thesecond storey).

7.3 In buildings not subject to the England andWales Building Regulations (ie Scotland orNorthern Ireland) it is recommended that designersshould consider the use of the guidance given insection 7.2.

7.4 With regard to fire stopping of cavitiesin limitations on the use of combustiblematerials, walls must comply with the

following provisions:England and WalesApproved Document B, Section 10, paragraph 13.5and 13.7

ScotlandMandatory Standards 2.4 Clauses 2.4.1(1)(2),2.4.2(1)(2), 2.4.7(1) and 2.4.9(2), 2.6 and 2.7

Northern IrelandTechnical Booklet E, paragraph 3.27 to 3.33 andSection 4.(1) Technical Handbook (Domestic).

(2) Technical Handbook (Non-Domestic).

8 Thermal insulation8.1 For the purpose of U value calculations todetermine if the requirements of the Building (orother statutory) Regulations are met, the thermalconductivity (� value) as stated by the insulationmanufacturers may be taken as listed in Table 2.

Table 2 Thermal conductivity values

Insulation � values(Wm–1K–1)

Expanded polystyrene 0.038

Mineral wool 0.036

Phenolic 20–24 mm 0.02425–44 mm 0.02345–80 mm 0.021

8.2 The requirement for limiting the heat lossthrough the building fabric will be satisfied ifthe U values of the building elements,

including thermal bridging, do not exceed themaximum values in the relevant ElementalApproach given in:England and WalesApproved Document L1 or L2, Table 1

ScotlandMandatory Standard 6.2

Northern IrelandTechnical Booklet F, Table 1.2 or 1.4.

8.3 Guidance is also given in these documents onselecting the thickness of insulation required toenable a wall to achieve the desired U value.Alternative approaches are described which allowfor some flexibility in design of U values forindividual constructional elements.

8.4 Where insulation boards have not beencontinued into window or door reveals due to alack of clearance, there will be a risk of coldbridging at these points. Where door and windowframes are to be replaced, it is recommended thattheir size be adjusted to permit the reveals to beinsulated.

8.5 Depending on constructional details, coldbridging can also occur at the eaves and atground-floor level, and care should be taken tominimise this, eg roof or loft insulations shouldcontinue over the wall head. Care should be taken toensure that ventilation openings are not obstructed.

9 Proximity of flues and appliancesWhen the systems are installed in close proximityto certain flue pipes the relevant provisions of thenational Building Regulations should be met:England and WalesApproved Document J

ScotlandMandatory Standard 3.19

Northern IrelandTechnical Booklet L.

10 Moisture penetrationTests and site examinations show that the systemswill resist the passage of moisture.

11 Risk of interstitial condensation11.1 The components of the systems have awater vapour resistance such that, under theadverse conditions likely to be found in

dwellings in the United Kingdom, interstitialcondensation should not occur within the insulation.

11.2 If the systems are to be used on the externalwalls of rooms expected to have continuous highhumidities, care must be taken in the design of therooms to avoid possible problems from theformation of interstitial condensation in the wall.

12 Maintenance12.1 Regular checks should be made on theinstalled system, particularly at joints, to ensure thatingress of water does not occur. Necessary repairsshould be effected immediately.

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12.2 Damaged areas must be repaired using theappropriate Envirowall components and theprocedures detailed in the Certificate holder’sinstallation instructions.

13 Strength and stability13.1 The systems have adequate resistance toimpact and abrasion where walls are exposed andhave some protection, eg walls of private dwellingsand walls of communal dwellings above ground-floor level. In other situations, where the systemmay be exposed to severe impact, eg walls ofpublic buildings, at ground-floor level, precautions,eg supplementary reinforcement; introduction ofplanting areas to restrict access should beconsidered to reduce the risk of damage. Furtherinformation may be obtained from BRE CurrentPaper CP 6 : 81 Assessment of external walls —Hard Body Impact Resistance.

13.2 The systems as specified in the DetailSheets can be designed to withstand thethermal stresses and wind pressures (includingsuction) normally experienced in the UnitedKingdom. The system can also be designed inaccordance with BS 6399-2 : 1997 to withstandthe increased wind loads associated with tallbuildings (greater than 12 metres) and areas ofhigh exposure. This may require the use of a greaternumber of fixings per unit area (see section 15.3).

14 Durability14.1 The results of accelerated ageing testsin accordance with MOAT No 22 : 1988indicate that the systems are durable. The

system should remain effective for at least 30 years,provided any damage to the surface finish isrepaired immediately, and regular maintenance isundertaken, including checks on joints in thesystems and external plumbing fitments to identifyleakage of rainwater into the system, enablingsteps to be taken to correct the defects.

14.2 A spardash finish will break up the flowof water on the surface and reduce the risk ofdiscoloration by water runs. The finish may becomediscoloured with time, the rate depending on theinitial colour, the degree of exposure andatmospheric pollution, as well as the design anddetailing of the wall. In common with traditionalrenders, discoloration by algae and lichens mayoccur in wet areas.

14.3 Render containing Portland cement maybe subject to lime bloom. The occurrence of thismay be reduced by avoiding application inadverse weather conditions. The effect is lessnoticeable on lighter colours.

Installation

15 Site survey and preliminary work15.1 Before application of an Envirowall ExternalWall Insulation System, a survey of the property iscarried out to determine:• suitability for treatment• necessary repairs required to the building

structure before installation can commence.

15.2 A specification is prepared for eachelevation of the building indicating:• position of beads• position and amount of reinforcement• additional reinforcement at corners of openings• detailing around windows, doors and at eaves• dpc level• exact position of expansion joints• areas where flexible sealants must be used• position of external plumbing• where required, the position of fire barriers.

15.3 The survey should include tests conducted onthe walls of the building by the Certificate holder ortheir approved suppliers to determine the pull-outresistance of the mechanical fixings. A CharteredStructural Engineer or similarly competent personwith experience of fixings should carry out anassessment and make recommendationsconcerning the type and number of fixings requiredto withstand the building’s expected wind loading.This should be based on calculations using the testdata, the relevant wind speed data for the site,and in the absence of a formal requirement, asafety factor of 3 should be used.

15.4 All necessary repairs to the building structuremust be completed before installation of the system.

15.5 Surfaces should be sound, clean, and freefrom loose material. The flatness of surfaces mustbe checked; this may be achieved using a straightedge spanning the storey height. Any excessiveirregularities, ie greater than 10 mm, must bemade good prior to installation to ensure that theinsulation boards or slabs are installed with asmooth, in-plane finished surface.

15.6 Where surfaces are covered with an existingrendering it is essential that the bond between thebackground and the render is adequate. All looseareas should be hacked off and reinstated.

15.7 On existing buildings, purpose-made sillsmust be fitted to extend beyond the finished face ofthe system. New buildings should incorporatesuitable sills.

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15.8 It is recommended that external plumbing beremoved and alterations made to undergrounddrainage, where appropriate, to accommodaterepositioning on the finished face of the systems.

15.9 New buildings should be of sound masonryor dense concrete construction.

15.10 Internal wet work, eg screeding orplastering, should be completed and allowed todry prior to the application of a system.

16 Approved installersApplication of the systems, within the context of thisCertificate, is carried out by approved installers. Anapproved installer is a company:• employing operatives who have been trained

and approved by the Certificate holder to installthe systems and who have been issued withappropriate training cards by the Certificateholder

• having undertaken to comply with the Certificateholder’s application procedure, containing therequirement for each application team to includeat least one member with a training card, and

• subject to supervision by the Certificate holder,including site inspections.

Bibliography

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

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

BS 6399-2 : 1997 Loading for buildings — Codeof practice for wind loads

BS 8000-3 : 2001 Workmanship on buildingsites — Code of practice for masonry

MOAT No 22 : 1988 Directives for theAssessment of External Insulation Systems for Walls(Expanded Polystyrene Insulation Faced with a ThinRendering)

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Conditions of Certification

17 Conditions17.1 This Certificate:(a) relates only to the product that is named,described, installed, used and maintained as setout in this Certificate;(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.

17.2 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.

17.3 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 by the BBA or itsagents; and(c) are reviewed by the BBA as and when itconsiders appropriate.

17.4 In granting this Certificate, the BBA is notresponsible for:(a) the presence or absence of any patent,intellectual property or similar rights subsisting in theproduct or any other product;(b) the right of the Certificate holder to market,supply, install or maintain the product; and(c) the actual works in which the product isinstalled, used and maintained, including thenature, design, methods and workmanship of suchworks.

17.5 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.

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In the opinion of the British Board of Agrément, Envirowall External Wall Insulation Systems arefit for their intended use provided they are installed, used and maintained as set out in thisCertificate. Certificate No 05/4206 is accordingly awarded to Envirowall Limited.

On behalf of the British Board of Agrément

Date of issue: 10th May 2005 Chief Executive

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

©2005For 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