TECHNICAL APPROVALS FOR CONSTRUCTION Wentloog Road … · TECHNICAL APPROVALS FOR CONSTRUCTION APPROVAL INSPECTION TESTING CERTIFICATION Euro Clad Ltd ... 9.2 and 9.4 of this Certificate

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TECHNICAL APPROVALS FOR CONSTRUCTION

APPROVALINSPECTIONTESTINGCERTIFICATION

Euro Clad LtdWentloog Corporate ParkWentloog RoadCardiff CF3 2ERTel: 029 2079 0722 Fax: 029 2079 3149e-mail: [email protected]: www.euroclad.com

British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: [email protected] WD25 9BA website: www.bbacerts.co.uk©2010

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.

EUROCLAD ROOF SYSTEMS

EUROCLAD TRAPEZOIDAL ROOF SYSTEMS

PRODUCT SCOPE AND SUMMARY OF CERTIFICATE

This Certificate relates to Euroclad Trapezoidal Roof Systems, for use in industrial, commercial, retail and leisure purposes as well as residential and non-residential buildings such as schools and hospitals.

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 ASSESSEDStructural performance — the roof will remain structurally stable if installed in accordance with the requirements of this Certificate, and deflections will not be excessive under normal service conditions (see section 5).Weathertightness — the roof will resist the passage of rain and wind-driven snow when installed in accordance with the provisions of this Certificate (see section 6).Thermal insulation — the roof can provide adequate insulation to contribute to enabling a building to meet the requirements of the national Building Regulations (see section 7).Condensation risk — the likelihood of condensation forming under normal service conditions is negligible (see section 8).Durability — durability depends on the location, environment and coatings used (see section 13).

Agrément Certificate04/4151

Product Sheet 3

The BBA has awarded this Agrément Certificate to the company named above for the systems described herein. These systems have been assessed by the BBA as being fit for their intended use provided they are installed, used and maintained as set out in this Certificate.On behalf of the British Board of Agrément Date of First issue: 14 April 2010 Brian Chamberlain Greg Cooper

Head of Approvals — Engineering Chief Executive

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In the opinion of the BBA, Euroclad Trapezoidal Roof Systems, 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: A1 Loading

Comment: The systems have sufficient strength and stiffness to sustain and transmit the design load in accordance with sections 5.1 to 5.4 of this Certificate.

Requirement: B2 Internal fire spread (linings)Requirement: B3(2) Internal fire spread (structure)

Comment: The interior exposed surfaces of the systems have been assessed as having the surface rating class given in section 10 of this Certificate.

Requirement: B4(2) External fire spread

Comment: The external surface of the sheets can be taken as having a notional ‘AA’ designation as defined by BS 476-3 : 2004 and therefore constructions incorporating the systems are not subject to a minimum distance from a boundary. See section 10 of this Certificate.

Requirement: C2(b) Resistance to moisture

Comment: The systems will resist the passage of moisture to the inside of the building when designed and installed in accordance with the manufacturer’s instructions. See sections 6.1 and 6.2 of this Certificate.

Requirement: C2(c) Resistance to moisture

Comment: The risks of surface or interstitial condensation posed by use of the systems are minimal. See sections 8.1 to 8.4 of this Certificate.

Requirement: L1(a)(i) Conservation of fuel and power

Comment: The systems can contribute to meeting the requirements of this regulation. See sections 7.1 to 7.4 and 9.1 to 9.3 of this Certificate.

Requirement: Regulation 7 Materials and workmanship

Comment: The systems are acceptable. See sections 13.1 to 13.4 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 use of the systems satisfies the requirements of this Regulation. See sections 12.1 to 12.3, 13.1 to 13.4 and the Installation part of this Certificate.

Regulation: 9 Building standards — constructionStandard: 1.1(a)(b) Structure

Comment: The systems have sufficient strength and stiffness to transmit the design load, with reference to clause 1.1.1(1)(2). See sections 5.1 to 5.4 of this Certificate.

Standard: 2.1 Compartmentation

Comment: The interior exposed surfaces of the systems, with reference to clause 2.1.15(2), have been assessed as having the risk classification given in section 10 of this Certificate.

Standard: 2.2 Separation

Comment: The interior exposed surfaces of the systems, with reference to clauses 2.2.10(1) and 2.2.7(2), have been assessed as having the risk classification given in section 10 of this Certificate.

Standard: 2.5 Internal linings

Comment: The interior exposed surfaces of the systems, with reference to clause 2.5.1(1)(2), have been assessed as having the risk classification given in section 10 of this Certificate.

Standard: 2.8 Spread from neighbouring buildings

Comment: The sheets have a low vulnerability classification and satisfy this Standard, with reference to clause 2.8.1(1)(2). See section 10 of this Certificate.

Standard: 3.10 Precipitation

Comment: The systems will resist the passage of moisture to the inside of the building, with reference to clause 3.10.1(1)(2). See sections 6.1 and 6.2 of this Certificate.

Standard: 3.15 Condensation

Comment: The risks of surface or interstitial condensation posed by use of the systems are minimal, with reference to clauses 3.15.1(1), 3.15.2(1), 3.15.3(1) and 3.15.4(1). See sections 8.1 to 8.4 of this Certificate.

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

Comment: The systems can contribute to fully or partially satisfying clauses 6.1.1(1), 6.1.2(1)(2), 6.1.3(2), 6.1.6(1), 6.2.1(1)(2), 6.2.3(1) and 6.2.4(2). See sections 7.1 to 7.4 of this Certificate. The systems can also contribute to satisfying clauses 6.2.4(1) and 6.2.5(1)(2). See sections 9.1, 9.2 and 9.4 of this Certificate.

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

Regulations

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

Regulation: B2 Fitness of materials and workmanship

Comment: The systems are acceptable. See sections 13.1 to 13.4 and the Installation part of this Certificate.Regulation: B3(2) Suitability of certain materials

Comment: The systems are acceptable. See sections 12.1 to 12.3 of this Certificate.Regulation: C4 Resistance to ground moisture and weather

Comment: The systems will resist the passage of moisture to the inside of the building. See sections 6.1 and 6.2 of this Certificate.

Regulation: C5 Condensation

Comment: The risks of surface or interstitial condensation posed by use of the systems are minimal. See sections 8.1 to 8.4 of this Certificate.

Regulation: D1 Stability

Comment: The systems have sufficient strength and stiffness to sustain and transmit the design load in accordance with sections 5.1 to 5.4 of this Certificate.

Regulation: E3 Internal fire spread — LiningsRegulation: E4 Internal fire spread — Structure

Comment: The interior exposed surfaces of the systems have been assessed as having the surface classification given in section 10 of this Certificate.

Regulation: E5 External fire spread

Comment: The external surface of the sheets can be taken as having a notional ‘AA’ designation as defined by BS 476-3 : 2004, and therefore constructions incorporating the systems are not subject to a minimum distance from a boundary. See section 10 of this Certificate.

Regulation: F2(a)(i) Conservation measures

Comment: The systems can contribute to meeting the requirements of this regulation. See sections 7.1 to 7.4, 9.1, 9.2 and 9.5 of this Certificate.

Construction (Design and Management) Regulations 2007Construction (Design and Management) Regulations (Northern Ireland) 2007Information 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 and 2.2) of this Certificate.

Non-regulatory Information

NHBC Standards 2008NHBC accepts the use of Euroclad Trapezoidal Roof Systems, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapters 7.1 Flat roofs and balconies and 7.2 Pitched roofs.

GeneralEuroclad Trapezoidal Roof Systems are intended to be used as structural roofing in installations with a finished fall of between 5° and 60° and curved installations with minimum curve radius of 40 metres. Smaller radius curves can be achieved, but are outside the scope of this Certificate (further details can be obtained from the Certificate holder). The systems are intended to be fixed to steel or timber purlins and structural decking and incorporate access for maintenance and repair. They are weathertight if designed and installed in accordance with the provisions of this Certificate.

Technical Specification

1 Description1.1 Euroclad Trapezoidal Roof Systems are coverings of profiled sheets (see Figure 1), attached to the roof substructure via a bracket and rail system which is fixed by mechanical fasteners either directly to the roof purlin or structural decking, or mounted on top-hat section sub-purlins.

Figure 1 Euroclad Trapezoidal Roof Systems — profiled sheet (all dimensions in millimetres)

23 94 167

31

1000

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1.2 The sheets are factory-made to order with a maximum practical length of 14 metres.1.3 System components include:External sheets — Euroclad Trapezoidal profiled roofing sheets, roll-formed from 0.7 mm thick steel with a range of coatings and substrates. These include Colorcoat HPS200(1), PVF2

(1), Prisma(1), LG(1) and Dobel 200XT(2).(1) The Colorcoat finishes are produced by Corus UK Limited and are covered by BBA Certificate 91/2717.(2) Dobel 200XT is produced by Dobel Coated Steel Ltd and is covered by BBA Certificate No 93/2973.

Fixings(1) — supplied to the Certificate holder’s specification and comprise:• carbon or stainless steel self-drilling screws for purlin, spacer and sheet fixing• carbon or stainless steel stitching screws for features such as flashings, hips, ridges• carbon or stainless steel 6.3 mm by 45 mm screws for fixing spacer brackets through the liner to the timber purlins(2).(1) Further details of fixings and their use are given in section 15.15.(2) The designer should confirm the number and length of fasteners necessary to give sufficient pull-out resistance for the grade of timber used for the purlin.

Lightweight metal support frame — made up of rails and brackets and comprises:• Eurobar Extra rails — formed from 1.5 mm thick, galvanized steel S390 GD Z275 to BS EN 10346 : 2009,

supplied in lengths of 1.2 m, 2.4 m and 3.6 m• Eurobar Extra brackets — formed from 1.5 mm thick galvanized steel DX1SD + Z275-N-A-C to BS EN 10346 : 2009• Eurobar Extra Mast brackets — formed from 1.6 mm thick, 320 N·mm–2 HSS galvanized steel• Eurobar Extra thermal break — manufactured from black polypropylene and factory-fitted to the top of the bracket • Eurobar Rails — formed from 1.2 mm pre-galvanized Z35 high tensile steel• Eurobar brackets — formed from 1.2 mm pre-galvanized Z35 high tensile steel.

Underlining sheets — decorative interior sheets comprising:• Euroclad MW5 liner sheets — rolled from 0.7 mm thick steel with a bright white lining enamel coating (perforated

sheets are used for acoustic constructions)• Euroclad MW5 liner sheets — rolled from 0.9 mm thick aluminium, perforated sheets with white PVF2 coating used

for acoustic constructions in aggressive environments, for example swimming pools• Euroclad 19/1000 liner sheets — from 0.4 mm thick steel with bright white lining enamel coating.

Flashings — flashings for ridge and verges, manufactured from 0.7 mm thick steel to the same specifications as the Trapezoidal profile sheet.Vapour control layer (VCL) (where required) — Euroclad Elite VCL reinforced polyethylene sheeting with 500 MN·s·g–1 vapour resistance (minimum), and compatible Euroclad Elite VCL 50 mm wide sealing tape.Blanket insulation — Euroclad Elite Quilt insulation, mineral wool to BS EN 13162 : 2001 with a !90/90 thermal conductivity of 0.040 W·m–1·K–1, 0.037 W·m–1·K–1, 0.035 W·m–1·K–1 or 0.032 W·m–1·K–1.Acoustic insulation — sound barrier comprising Euroclad Elite Acoustic Slab, a tissue-faced acoustic panel to BS EN 13162 : 2001 with a !90/90 thermal conductivity of 0.034 W·m–1·K–1, and Euroclad Elite Pre-cut Acoustic Slab, a pre-cut version of the Acoustic Slab to fit into the MW5 Liner trough.Breather membrane — Euroclad Elite Roof Breather Membrane, BBA approved for roofing applications.1.4 Other accessories covered by this Certificate (unless otherwise stated) and used with the system, include:Eaves and ridge foam filler pieces — closed-cell EPDM or MP with gaps to provide adequate ventilationSealant — type A butyl rubber strip, in the form of 1 mm by 50 mm side lap sealant, 6 mm by 5 mm end lap sealant and 4 mm bead sealant.1.5 Accessories which can be incorporated into the roof, but are outside the scope of this Certificate, include gutters, gutter support channels and openings to details such as vents, PVC, GRP or polycarbonate rooflights.1.6 Quality control checks include:• dimensions • chemical composition • mechanical properties• coating thicknesses • finished panel dimensions.

1.7 The foam filler blocks for the eaves and the ridge are to the Certificate holder’s specifications and are bought in from their approved suppliers. They are subject to visual and dimensional quality control checks.1.8 The sheets used with the fixings detailed in section 1.5 enable various constructions to be built. Details of the basic systems and the sequence of components are:Euroclad System 1 (double-skin construction)Roofs are constructed from a selection of the components listed in section 1.3, depending on the required U value. The systems covered by this Certificate are described in Table 1. Other constructions, details of which may be obtained from the Certificate holder, are available and cover a wider range of U values but are outside the scope of this Certificate. System 1 comprises 32/1000 trapezoidal sheets with Eurobar rails and brackets and 19/1000 liner sheet. A typical roof construction is shown in Figure 2.

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Table 1 Euroclad Trapezoidal roof systems

System Outer sheet Insulation Spacer Liner sheet

1.20 0.7 mm thick steel 32/1000 profile sheet

220 mm, 0.040 W·m–1·K–1 210 mm Eurobar 0.4 mm thick steel 19/1000 profile sheet


180 mm, 0.040 W·m–1·K–1 170 mm Eurobar 0.4 mm thick steel 19/1000 profile sheet


280 mm, 0.035 W·m–1·K–1 280 mm Eurobar Extra mast brackets

0.7 mm thick steel MW5 profile sheet








Minimum 240 mm, 0.040 W·m–1·K–1

240 mm Eurobar Extra mast brackets





2.25 A2 0.7 mm thick steel 32/1000 profile sheet

200 mm, 0.040 W·m–1·K–1 quiltand 32 mm deep pre-cut acoustic slab

insulation 0.034 W·m–1·K–1



2.25 AP2 0.7 mm thick steel 32/1000 profile sheet

200 mm, 0.040 W·m–1·K–1 quiltand 32 mm deep pre-cut acoustic slab

insulation 0.034 W·m–1·K–1


0.9 mm thick perforated aluminium MW5 profile sheet

7 0.7 mm thick steel 32/1000 profile sheet

Various depths Eurobar Extra brackets on 30 mm deep top-hat section

Eurodeck in various profiles and thicknesses

7A1and 7AP1

0.7 mm thick steel 32/1000 profile sheet

Various depths of quilt and30 mm deep Elite Acoustic

Slab 0.034 W·m–1·K–1

Eurobar Extra brackets on 30 mm deep top-hat section

Perforated Eurodeck in steel or

aluminium, various profiles and thicknesses

Figure 2 Euroclad System 1

32/1000 outer sheet

insulation

Eurobar rail

liner sheet

Eurobar bracket

purlin

Euroclad System 2 (double-skin construction)As System 1 but with Eurobar Extra rails, Eurobar Extra or Mast brackets and MW5 liner (see Figure 3).

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Eurobar rail

purlin

32/1000 outer sheet

insulation

liner sheet

Eurobar bracket

Euroclad System 7 (trapezoidal sheets on structural decking)As for double-skin construction, but using Euroclad Eurodeck structural decking sheets, manufactured from galvanized steel or aluminium in various thickness and profiles, as the inner lining. The spanning capabilities, durability and fire adequacy of the structural decking are outside the scope of this Certificate and the Certificate holder should be contacted for further details. Perforated decks with acoustic slab insulation are used for acoustic absorption constructions. Eurobar Extra brackets may be fixed via a top-hat section sub-purlin to the structural deck (see Figure 4).


Eurobar Extra rail

32/1000 outer sheet

insulation

Eurobar Extra bracket

top-hat sub-purlin

vapour control layer

structural deck

Acoustic absorption constructionsAs for double-skin constructions, but using a perforated liner sheet or deck, System 2 32 mm deep Elite Pre-cut Acoustic Slab insulation and System 7 30 mm deep Elite Acoustic Slab insulation (see Figure 5).

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Figure 5 Euroclad Acoustic absorption constructions

Eurobar Extra rail

32/1000 outer sheet

insulation

vapour control layer

Eurobar Extra bracketpurlin

perforated liner

acoustic slab insulation

Other constructionsWhen used in other assemblies the full system performances given in this Certificate cannot be assumed. The Euroclad Trapezoidal sheet profile’s structural details, fire performance and durability as described in this Certificate will apply but the designer must be satisfied on other aspects of performance, ie thermal insulation, risk of condensation and acoustic performance.

2 Delivery and site handling2.1 Euroclad Trapezoidal sheets are packed in bundles, each one weighing a maximum of two tonnes and carrying a label bearing the BBA identification mark (incorporating the number of this Certificate), the quantity and lengths of the panels, the gross weight of the bundle and the site location. A lifting beam must be used to unload lengths exceeding 8 m.2.2 Where sheets are to be temporarily stored on the roof, the loadbearing capacity of the structure on which they are being stored must be considered, and they must be restrained from movement caused either by gravity or wind action.2.3 Where sheets are to be stored on the ground, the base must be dry, firm and gently sloped to allow drainage, and the sheets should be protected from the risk of damage.2.4 Any damage to components before or during installation will affect the durability of the roof system. Therefore, items should be handled and stored in accordance with the following guidelines:• liner and decking sheets should be handled in the same way as for the profile sheets• rolls of VCL must be handled carefully to avoid puncturing and to prevent damage, and must not be stored on end.

For long-term storage the rolls should be protected from ultraviolet light and stored indoors or under non-translucent covers. The VCL should be dry during installation

• blanket insulation is delivered to site in polyethylene wrapped rolls. For long-term protection these must be stored indoors or under a waterproof covering.

Assessment and Technical InvestigationsThe following is a summary of the assessment and technical investigations carried out on Euroclad Trapezoidal Roof Systems.

Design Considerations

3 General3.1 Euroclad Systems 1, 2 and 7 are satisfactory for use as structural roofing in installations with a finished fall of between 5° and 60° and curved installations with a minimum curve radius of 40 metres where access is available for maintenance and repair only. Factory curved sheets are available for smaller radii roofs but are outside the scope of this Certificate (further details can be obtained from the Certificate holder).3.2 If architectural features, through fittings or rooflights are required on the roof, special care and attention is necessary to ensure that, in common with all metal roofs, these features have been correctly detailed and fitted.

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4 Practicability of installationThe system is designed to be installed by a competent general builder, or a roofing contractor, experienced with this type of system.

5 Structural performance5.1 The systems have adequate strength and stiffness to sustain anticipated loads. Load/span values are given in Table 2 and should be used as follows:

• based on span (see Table 2, footnote 3), it must be confirmed that the proposed specification is adequate to resist the design loads (see section 5.2)

• the spacing between Eurobar and Eurobar Extra/Mast brackets must be checked to ensure that it is adequate. Values given in Table 2 are based on 1 metre spacings (Eurobar) and 1.2 metre bracket spacings (Eurobar Extra and Mast).

Table 2 Maximum permissible snow and wind loads for Euroclad Trapezoidal Roof Systems (1)(2)

Span(3)

(m)

Positive (snow) load (kN·m–2) Negative (wind) load

(kN·m–2)Systems 2 and 7

Eurobar extra spacer System 1

Eurobar spacer

1.0 3.72 1.16 3.95

1.1 3.22 1.15 3.42

1.2 2.81 1.14 3.00

1.3 2.48 1.13 2.65

1.4 2.20 1.12 2.36

1.5 1.97 1.11 2.12

1.6 1.78 1.09 1.91

1.7 1.61 1.06 1.73

1.8 1.46 1.04 1.58

1.9 1.34 1.01 1.44

2.0 1.23 0.98 1.33

2.1 1.13 0.94 1.22

2.2 1.04 0.90 1.13

(1) The figures given are for uniformly distributed loads on double and multiple spans. Details of single spans or other load cases can be obtained from the Certificate holder.

(2) Deflection limit = span/200.(3) The span is the distance between purlins or Eurobar Extra rails if fitted to a structural deck.General notes:• The data have been taken from profile load/span table prepared by The Steel Construction Institute in accordance with EC3

which has been verified, and limited where necessary, against full system test data from CERAM Building Technology.• The self-weight of the Euroclad Trapezoidal sheeting has been taken into account.• Advice on excessive loads or spans, different deflection criteria, different factors of safety and different metals, can be obtained

from the Certificate holder.• The safety factor used is 1.5 for positive and negative loads.• All spans are assumed to be equal to or within 15% of the largest span.

5.2 When evaluating the design loads, the wind loads must be calculated in accordance with the recommendations of BS 6399-2 : 1997, and the imposed snow loads must be checked in accordance with the recommendations of BS 6399-3 : 1988.5.3 Where the liner provides lateral restraint to the purlin, the detail of the fixing between purlin and liner must be determined by the structural engineer responsible for the overall roof design.5.4 The profiled sheets are capable of withstanding impacts associated with normal handling, installation and service.

6 Weathertightness6.1 When installed in accordance with the Certificate holder’s instructions, the system is weathertight when used in installations with finished falls of 5° to 60° or curved roofs with a minimum radius of 40 metres, and within the recommended maximum design wind pressures and exposure conditions. Factory curved sheets are

available for smaller radii roofs but are outside the scope of this Certificate (further details can be obtained from the Certificate holder).6.2 The weathertightness of the product will not be adversely affected by normal service deflections.

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7 Thermal insulation7.1 The thermal performance of each building incorporating the roof system must be evaluated in accordance with the relevant Building Regulations, and is the responsibility of the overall designer of the building.

7.2 Thermal transmittance values (U values) are given in Table 3. Unless otherwise stated, the thermal conductivity (!) value of the mineral wool has been taken as 0.04 W·m–1·K–1.

Table 3 U values (1) for Euroclad Ltd Systems 1 and 2

System(3) Span(2) (m)

1.0 1.2 1.4 1.5 1.6 1.8 2.0

1.20 0.21 0.21 0.20 0.20 0.20 0.20 0.20

1.25 0.26 0.26 0.25 0.25 0.25 0.25 0.25

2.15(3) 0.16 0.16 0.15 0.15 0.15 0.15 0.14

2.16(3) 0.17 0.16 0.16 0.16 0.16 0.15 0.15

2.17 0.18 0.17 0.17 0.17 0.17 0.16 0.16

2.20 0.21 0.20 0.20 0.20 0.19 0.19 0.19

2.25 0.27 0.26 0.26 0.25 0.25 0.25 0.25

2.25A2 0.27 0.26 0.25 0.25 0.25 0.25 0.25

(1) The thermal conductivity of mineral wool in System 2.15 is 0.035 W·m–1·K–1 and in System 2.16 is 0.037 W·m–1·K–1. Other U values may be achieved by varying the components used but are outside the scope of this Certificate. Further information can be obtained from the Certificate holder.

(2) The span is the distance between purlins.(3) Full system descriptions are given in section 1.8.

7.3 The roof system contributes to meeting the requirements of the national Building Regulations, thus:

England and Wales• roofs, subject to system type and purlin spacing, can achieve (see Table 3):— 0.16 W·m–2·K–1 required for ‘notional’ dwellings in SAP 2005— 0.25 W·m–2·K–1 for a ‘notional’ building, other than a dwelling, in the Simplified Building Energy Model SBEM — 0.25 W·m–2·K–1 limit average value specified in Approved Documents L1A, Table 2, and L2A, Table 4— 0.35 W·m–2·K–1 limit value for an individual roof element specified in Approved Documents L1A, Table 2, and L2A,

Table 4.Scotland• roofs, subject to system type and purlin spacing, can achieve (see Table 3):— 0.16 W·m–2·K–1 for a ‘notional’ domestic roof with reference to Mandatory Standard 6.1, clause 6.1.6(1), and SAP

2005— 0.16 W·m–2·K–1 for a ‘notional’ non-domestic pitched roof (>10°) with reference to Mandatory Standard 6.1,

clause 6.1.3(2), and when ‘Scotland’ is selected in SBEM— 0.20 W·m–2·K–1 maximum average specified in Mandatory Standard 6.2, clause 6.2.1(1), Table— 0.25 W·m–2·K–1 maximum average value specified in Mandatory Standard 6.2, clause 6.2.1(1)(2), Table— 0.35 W·m–2·K–1 maximum value for an individual roof element specified in Mandatory Standard 6.2,

clause 6.2.1(1)(2), Table.(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

Northern Ireland• roofs, subject to system type and purlin spacing, can achieve (see Table 3):— 0.16 W·m–2·K–1 required for ‘notional’ dwellings in SAP 2005— 0.25 W·m–2·K–1 for a ‘notional’ building other than a dwelling specified in SBEM— 0.25 W·m–2·K–1 limit average value specified in Technical Booklets F1, Table 2.2, and F2, Table 2.4— 0.35 W·m–2·K–1 limit value for an individual roof element as specified in Technical Booklets F1, Table 2.2, and F2,

Table 2.4.7.4 It is essential that a suitable continuous air barrier is installed to limit air infiltration (see sections 9.1, 9.2 and 9.3) and that details such as eaves and gables are designed to adequately limit heat loss by conduction (for example, by filling with insulation to maintain the insulation envelope and by minimising thermal bridges). Typical details are shown in Figure 6.

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Figure 6 Typical ridge, eaves and verge details

ridge flashing

32/1000 outer sheet

Eurobar rail

liner sheet

liner flashing

Eurobar bracket

insulationverge flashinginsulation

liner sheet Eurobar bracket

32/1000 outer sheet

liner sheet

Eurobar bracket

32/1000 outer sheet

gutter support rail

8 Condensation risk8.1 In common with all metal roof constructions, there is a risk of condensation. This can arise either as interstitial condensation within the roof construction or surface condensation at thermal bridges.

Surface condensation8.2 The temperature at which surface condensation will occur on the internal surfaces of the roof is dependent on the internal relative humidity and the internal and external temperatures. The risk of surface condensation and mould growth for a particular construction should be assessed in accordance with BS EN ISO 13788 : 2002. Additional guidance in connection with this can be found in BS 5250 : 2002.8.3 In buildings likely to experience high internal relative humidities (eg building internal humidity class 5) there is a minimal risk of intermittent condensation forming on the fixing screws penetrating the purlin. The designer should anticipate the areas of the structure that could be at risk from sustained sources of humidity and take the necessary measures to prevent any such problems (see section 8.6).

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Interstitial condensation8.4 The system has been assessed by computer modelling for the risk of damage and harmful effects on the building due to interstitial condensation. The modelling predicts that for buildings in internal humidity classes 1 to 4 (see Table 4), under the normal climatic conditions experienced in the UK, interstitial condensation is unlikely to be a significant problem. As a result, the risk of interstitial condensation reducing the thermal and structural performance of the roof systems will be limited. This assessment is only valid provided the following details are carried out in accordance with the Certificate holder’s instructions and this Certificate:• the VCL remains undamaged, is continuous over ridges and hips, and is sealed at penetrations/abutments• VCL laps are adequately sealed• for installations without the separate VCL (building internal humidity classes 1 and 2 only), the liner panel laps must

be adequately sealed• the ribs of the trapezoidal profile are ventilated by air passing along them from and to open areas at the eaves and

the ridge.

Table 4 Building internal humidity classes

Humidity class(1) Building type

1 Storage areas

2 Offices, shops

3 Dwellings with low occupancy

4 Dwellings with high occupancy, sports halls, kitchens, canteens, buildings with unflued gas heaters

5 Special buildings, eg laundries, breweries, swimming pools

(1) As referenced in EN ISO 13788 : 2001 and BS 5250 : 2002.

8.5 For buildings in internal humidity class 5 and in buildings or areas of a building with special internal design conditions, a hygrothermal assessment of the proposed roof system should be undertaken using the guidance given in BS 5250 : 2002, BS 5925 : 1991 and BS 6229 : 2003, to establish whether special provisions are required.8.6 A separate VCL is required if the roof systems are used in buildings such as dwellings. This is also required for Euroclad System 7 and acoustic systems using a perforated liner.

9 Air permeability9.1 The airtightness of the system is reliant on the careful sealing of the liner or VCL. The airtightness of a roof system is dependent on maintaining the integrity of the seal throughout. In addition to sealing at all joints, the liner or VCL must be suitably sealed at the perimeter and all penetrations. Details of sealing at all laps, eaves,

ridges, hips, valleys and penetrations must be in accordance with the Certificate holder’s instructions.9.2 The airtightness of the building will also be dependent on the performance of the other building elements. Provided these also incorporate appropriate design details and building techniques, air infiltration through the building fabric should be minimal and the building reasonably airtight.

9.3 Completed buildings in England and Wales are subject to pre-completion testing for airtightness in accordance with the requirements of Approved Documents L1A and L2A, section 20B.

9.4 Completed buildings in Scotland are only subject to pre-completion airtightness testing if the target air permeability of the proposed building is less than 10 m–3·h–1·m–2, or if the figure is between 10 m–3·h–1·m–2 and 15 m–3·h–1·m–2 and the designer does not wish to use the 15 m–3·h–1·m–2 default figure in the proposed building,

in accordance with Mandatory Standard 6.2, clauses 6.2.5(1) and 6.2.6(2).(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

9.5 In Northern Ireland, completed buildings are subjected to pre-completion testing for airtightness in accordance with the requirements of Technical Booklets F1, sections 2.46 to 2.54, and F2, sections 2.57 to 2.61.

9.6 Air leakage design test data are available from the Certificate holder.

10 Performance in relation to fireThe sheets have a notional ‘AA’ designation as defined by BS 476-3 : 2004 (or ’low vulnerability‘ in Scotland) provided the blanket insulation installed has a ‘non-combustible’ classification when tested in accordance with BS 476-4 : 1970.

Page 12 of 16

11 Acoustics11.1 Test data to BS EN ISO 140-3 : 1995 and BS EN ISO 717-1 : 1997 indicate the sound reduction indices given in Table 5.

Table 5 Sound reduction indices

System(1) Sound reduction index (dB)

1.25 (Rockwool 0.040 insulation) 45 (–3 ; –8)1.25 (Knauf 0.040 insulation) 41 (–2 ; –7)1.20 (Knauf 0.040 insulation) 43 (–2 ; –7)2.20 (Rockwool 0.040 insulation) 47 (–1 ; –4)2.20 (Knauf 0.040 insulation) 45 (–1 ; –4)2.25 (Rockwool 0.040 insulation) 47 (–1 ; –6)2.25 (Knauf 0.040 insulation) 45 (–1 ; –6)2.25A2 (Rockwool 0.040 insulation) 45 (–3 ; –8)

(1) Full system descriptions are given in section 1.8.

11.2 Test data to BS EN ISO 354 : 2003 indicate the absorption coefficients given in Table 6. The weighted sound absorption coefficient ("w) was calculated as 1.00 in accordance with BS EN ISO 11654 : 1997, giving a class A rating. The noise reduction coefficient (NRC) was calculated as 1.00 in accordance with ASTM C 423-01.

Table 6 Sound absorption coefficients

System(1) Octave frequency bands (Hz)

Sound absorption coefficient (")

Practical sound absorption coefficient(2) ("p)

2.25A2 (Rockwool insulation) 125 1.00 0.90

250 1.17 1.00

500 1.03 1.00

1000 0.91 0.95

2000 0.96 0.95

4000 1.05 1.00

(1) Full system descriptions are given in section 1.8.(2) Calculated in accordance with BS EN ISO 11654 : 1997.

12 Maintenance12.1 The system should be inspected regularly for accidental damage to the roof sheets and their coatings, and also for any build-up of dirt and debris. Damage must be repaired and accumulated dirt and debris removed. The frequency of inspections will depend on the environment and use of the building.

12.2 In industrial and coastal areas it may be necessary to clean the installation periodically by hosing with water and a neutral detergent to restore its appearance and to remove corrosive deposits. It may be necessary to clean soffits in any environment.12.3 Damaged sheets can be removed and replaced. The Certificate holder should be contacted for details.

13 Durability13.1 The durability of the sheets will depend upon the coating material, the immediate environment, aspect faced and use.

13.2 Maintenance painting may be necessary to restore the appearance of coated sheets or to extend their design life, and should be considered at the intervals given in Table 7.13.3 For coated sheets in buildings with exposed eaves detail, in aggressive environments, or subject to corrosive conditions inside, a more durable specification of the reverse-side coating should be used. Details can be obtained from the Certificate holder.13.4 A planned maintenance cycle (see section 12) should be introduced if an extended design life is required. The Certificate holder can recommend a suitable system for maintenance painting.13.5 Colour changes will be slight and uniform on any one elevation.

Page 13 of 16

Table 7 Service life

Sheet material Minimum service life(1) (years)

Environment

Rural or suburban Industrial or coastal

Colorcoat Prisma coated steel(2)

Colorcoat PVDF coated steel(also known as PVF2)(2)

Colorcoat HPS200 coated steel(2)

Colorcoat LG coated steel(2)

Dobel 200XT coated steel(4)(5)

20

15

30 (CD1 colours)20 (CD2 colours)


15

10(3)

10(3)


20 (CD1 colours) 10 (CD2 colours)(3)

10(4)

(1) Minimum service life is that when first maintenance painting is required.(2) Full details of Corus coated materials are given in BBA Certificate 91/2717.(3) Prisma, PVDF, LG (CD2 colours) or 200XT coated steel in coastal locations will not satisfy the durability requirements of the

NHBC Standards 2008 . Alternative coatings should be used in these circumstances.(4) Full details of Dobel coated materials are given in BBA Certificate 93/2973.(5) The Euroclad Elite guarantee only applies to roof systems using Corus Colorcoat finishes. Further details can be obtained from the Certificate holder.

Installation

14 General14.1 Installation of Euroclad Trapezoidal Roof Systems is carried out by experienced roofing contractors in accordance with the Certificate holder’s instructions. Guidance can be provided by the Certificate holder for contractors who are unfamiliar with the system.14.2 Euroclad MW5 liner sheets and 32/1000 profile sheets can be fitted to achieve a non-fragile class B rating in accordance with ACR[M]001 : 2000. Euroclad 0.4 mm steel 19/1000 liner sheets can be fitted to achieve a Class C rating in accordance with ACR[M]001 : 2000. Copies of drawings FR17 (MW5), FR15 (32/1000) and FR4 (19/1000) detailing these installations may be obtained from the Certificate holder.

15 Procedure15.1 The liner sheets are placed in position with all joints lapped, stitched and sealed (where necessary) and fixed to the roof purlins/rafters. Alternatively the deck sheets are placed in position and fixed to the roof rafters. Plywood decking over timber rafters will be fitted by others prior to installation. Solid filler blocks are located in the liner or decking profile at details such as eaves, hips and ridges to ensure adequate airtightness of these details.15.2 Where a sealed liner is used to achieve vapour control in place of a separate VCL, the end laps must be a minimum of 120 mm for System 1 and 60 mm for System 2, and sealed with 6 mm by 5 mm type A butyl rubber strip positioned below fixing positions parallel to the edge of the sheet.15.3 The liner side laps are sealed with 50 mm by 1 mm type A butyl rubber strip positioned centrally along the side lap joint, or 6 mm by 5 mm type A butyl rubber strip positioned inside the lap with stitching screws at 500 mm centres.15.4 All fixings penetrating the liner or VCL must have bonded washers to provide an air seal.15.5 Swarf or debris is removed from the liner or decking before being covered by the VCL sheets, if required. The VCL is laid in the same direction as the liner or decking sheets and is made continuous by lapping all joints by a minimum of 50 mm and sealing with 50 mm wide VCL sealing tape, centrally along the side lap joint. The VCL sheets should be continuous over ridges/hips and sealed to penetrations/abutments. 15.6 The Eurobar/Eurobar Extra/Mast brackets are inserted into the Eurobar/Eurobar Extra rail at appropriate centres and fixed, using appropriate fasteners, through the VCL and liner sheet directly to the purlins or top hat section, if used. All fixings must have bonded washers to provide an air seal.15.7 The mineral fibre blanket insulation is laid between and underneath the Eurobar/Eurobar Extra rail, taking care to ensure continuity and that the space is fully filled, ie no voids.15.8 The 32/1000 profile sheet is placed onto the Eurobar Extra rail starting at the eaves line and working upwards, if there is more than one sheet required for the slope length. Attention should be paid to ensuring that the alignment is correct and that the sheet is fixed with its side underlap edge leading. Fixings are made through the trough of the profile into the spacer rail. End laps must be made above the spacer rail with a minimum of 150 mm overlap (see Figure 7). At sheet ends and end laps a fixing is made in every trough, and in intermediate supports every other trough.

Page 14 of 16

Figure 7 End lap detail

32/1000 outer sheet6 x 5 class A butyl sealant

Eurobar Extra

4 mm bead class A butyl

MW5L 0.7 mm liner

purlin a = min 120 mm for System 1min 60 mm for System 2

150 minimum

a

15 15

15.9 The barge board flashing is fixed to complete the detail, using the appropriate fasteners at 450 mm centres and a 6 mm by 5 mm strip of butyl rubber sealant to the crown of the first rib of the profile.15.10 Prior to the next 32/1000 profile sheet being positioned, a 6 mm by 5 mm strip of butyl rubber sealant is run along the length of the side underlap on the crown of the rib (and across the end lap position, above and below the fixing position approximately 15 mm from the sheet edges, if there is more than one sheet required for the slope length). The next sheet is laid in position and fixed. Side laps are stitched at maximum 450 mm centres.15.11 When the final sheet has been secured, the barge board flashing is fixed to complete the detail, using the appropriate fasteners at 450 mm centres and a 6 mm by 5 mm strip of butyl rubber sealant to the crown of the last rib of the profile.15.12 The ridge detail (see Figure 6) is constructed by placing the ridge filler blocks into the profile at 90° to the sheets. The ridge flashing is fixed with fasteners at every other crown over each sheet.15.13 Eaves details may vary but a typical construction is shown in Figure 6.15.14 Closures and fillers for hip details are cut according to roof pitch and plan angle for each side of the hip, to suit project requirements. They are installed as described in section 15.12 but are positioned parallel to the centreline of the hip.15.15 Details of fixings and their appropriate use are given in Table 8.

Table 8 Details of fixings

Application Description Frequency

To fix Eurobar Extra, Eurobar Mast or Eurobar backets to cold-rolled steel purlins, maximum 3 mm thick (including liner)

5.5 mm diameter self-drill, 25 mm to 28 mm long, with washer (304 grade stainless steel for Elite Plus,

carbon steel for Standard and Elite)

2 per bracket. 4 per bracket for Mast 260 mm and over

To fix temporary rail to Mast bracket, Eurobar Extra or Eurobar Extra Mast



1 through rail into bracket at beginning of each run of rails

To fix systems 7 and 7A Eurobar Extra bracket to 1.6 mm galvanizedtop hats



2 per bracket. 4 per bracket for Mast 260 mm and over

To fix standard and perforated 0.7 mm MW5 steel liner to cold-rolled steel purlins, maximum 3 mm thick



Sheet ends and end laps: every corrugation (perforated liner: minimum 29 mm washer

and 140 mm end laps (70 mm edge distance) for non-fragile Class C). Intermediate supports: every

other corrugation

To fix 0.4 mm 19/1000 liner to cold-rolled steel purlins, maximum 3 mm thick



Sheet ends and end laps: every corrugation minimum 29 mm washer and 120 mm end laps (60 mm edge distance) for non-fragile Class C. Intermediate supports: every other corrugation

To primary fix 32/1000 Trapezoidalsteel sheet to Eurobar Extra or Eurobar rail



Sheet ends and end laps: every corrugation. Intermediate supports: every other corrugation

To fix side laps Sidelap stitcher with washer, 4.8 x 20 mmor 6.3 x 25 mm, 304 grade stainless steel

At maximum 450 mm centres

To fix verge flashing to sheet crown Sidelap stitcher with washer, 4.8 x 20 mmor 6.3 x 25 mm, 304 grade stainless steel

At 450 mm centres

To fix ridge flashing to sheet crown Sidelap stitcher with washer, 4.8 x 20 mmor 6.3 x 25 mm, 304 grade stainless steel

At 335 mm centres (every other rib of each sheet)

Page 15 of 16

Technical Investigations

16 TestsTests were carried out on the product to establish:• resistance to dead and imposed (snow) loading• resistance to wind loading• behaviour of fixings and profile under static and cyclic loading• resistance to impact• behaviour under concentrated loads.

17 Investigations17.1 The manufacturing process was examined, including the methods adopted for quality control, and details were obtained of the quality and composition of the materials used.17.2 An assessment was made of:• fire resistance• practicability of installation• condensation risk and thermal transmittance• weathertightness of fixed cladding and details• acoustic performance.

17.3 Existing information, relating to the durability of the system, performance in fire and compatibility of materials in contact, was examined.17.4 A visit was made to a site to assess the practicability of installation.

Additional informationAssemblies using Euroclad external profiles, rooflights and liner profiles have been tested in accordance with ACR[M]001 : 2000. Systems are capable of achieving Class B classification. This aspect is outside the scope of this Certificate and is entirely the responsibility of the Certificate holder, from whom further details are available.Three dimensional thermal modelling has been carried out by the Certificate holder to establish Psi values and f factors for a number of standard construction details. These performances are outside the scope of this Certificate. Further details are available from the Certificate holder.Systems 1, 2 and 7 are available with an Elite guarantee. Euroclad Elite Systems carry a component guarantee on system parts supplied by Euro Clad Ltd. Euroclad Elite Plus Systems carry a 25 year guarantee whilst Euroclad Elite Systems carry a 12 year guarantee. Such guarantees are outside the scope of this Certificate. The Certificate holder should be contacted for further details of the conditions for and availability of the guarantee.

BibliographyBS 476-3 : 2004 Fire tests on building materials and structures — Classification and method of test for external fire exposure to roofsBS 476-4 : 1970 Fire tests on building materials and structures — Non-combustibility test for materialsBS 5250 : 2002 Code of practice for control of condensation in buildingsBS 5925 : 1991 Code of practice for ventilation principles and designing for natural ventilationBS 6229 : 2003 Flat roofs with continuously supported coverings — Code of practiceBS 6399-2 : 1997 Loading for buildings — Code of practice for wind loadsBS 6399-3 : 1988 Loading for buildings — Code of practice for imposed roof loadsBS EN 10346 : 2009 Continuously hot-dip coated steel flat products — Technical delivery conditionsBS EN 13162 : 2001 Thermal insulation products for buildings — Factory made mineral wool (MW) products — SpecificationBS EN ISO 140-3 : 1995 Acoustics — Measurement of sound insulation in buildings and of building elements — Laboratory measurement of airborne sound insulation of building elementsBS EN ISO 717-1 : 1997 Acoustics — Rating of sound insulation in buildings and of building elements — Airborne sound insulationBS EN ISO 354 : 2003 Acoustics — Measurement of sound absorption in a reverberating roomBS EN ISO 11654 : 1997 Acoustics—Sound absorbers for use in buildings — Rating of sound absorption

Page 16 of 16

BS EN ISO 13788 : 2002 Hygrothermal performance of building components and building elements — Internal surface temperature to avoid critical surface humidity and interstitial condensation — Calculation methodsEN ISO 13788 : 2001 Hygrothermal performance of building components and building elements—Internal surface temperature to avoid critical surface humidity and interstitial condensation — Calculation methodsASTM C 423 : 2008 Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room MethodAdvisory Committee for Roofwork, ACR[M]001 : 2000 Test For Fragility of Roofing Assemblies [second edition]

Conditions of Certification

18 Conditions18.1 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.

18.2 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.18.3 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.

18.4 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.

18.5 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.

British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: [email protected] WD25 9BA website: www.bbacerts.co.uk©2010