1、BS 4841-5:2006Rigid polyisocyanurate (PIR) and polyurethane (PUR) products for building end-use applications Part 5: Specification for laminated boards (roofboards) with auto-adhesively or separately bonded facings for use as thermal insulation boards for pitched roofsICS 91.100.60NO COPYING WITHOUT
2、 BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2006ISBN 0 580 48193 XThe following BSI references relate to the work on this standard:Committe
3、e reference PRI/72/4Draft for comment 05/30124996 DCPublication historyFirst published, July 2006Amendments issued since publicationAmd. no. Date Text affectedBS 4841-5:2006 BSI 2006 iBS 4841-5:2006ContentsForeword ii1 Scope 12 Normative references 13 Terms, definitions and symbols 14 Construction a
4、nd composition 25 Requirements 36 Designation 67 Marking 6AnnexesAnnex A (informative) Method for the determination of areas of unbonded facings 7Annex B (informative) Information for users and designers 9Annex C (informative) Reaction to fire performance of PIR and PUR products and recommendations
5、regarding their use 9Annex D (informative) Information on the installation of roofboards into pitched roofs 9Bibliography 11List of figuresFigure 1 Diagram to explain orientations for compressive strength measurements 5Figure A.1 Determination of area(s) of unbonded facings: cutting and marking of t
6、he test specimen 8List of tablesTable 1 Tolerances for lengths and widths 3Table 2 Classes for thickness tolerances 3Table 3 Deviation from flatness 4Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 11, an inside back cover and a back cover.ii
7、BSI 2006BS 4841-5:2006ForewordPublishing informationThis British Standard was published by BSI and came into effect on 20 July 2006. It was prepared by Subcommittee PRI/72/4, Polyurethane,under the authority of Technical Committee PRI/72, Rigid cellular materials.Information about this documentThis
8、British Standard has been introduced to specify the requirements needed to ensure fitness for purpose of those polyurethane and polyisocyanurate cored insulation roofboards with auto-adhesively or separately bonded flexible and/or rigid facings used in pitched roofs in the United Kingdom. The requir
9、ements have been written so that products conforming to BS 4841-5 also conform to BS EN 13165:2001 (including amendments 1 and 2) whilst satisfying the specified minimum performance levels of the properties included in the current standard.Additional information for the guidance of users, installers
10、 and designers is given in informative Annexes A, B, C and D to this standard.The other parts of BS 4841 have been revised to reflect recent technical advances and to take into account the European Standard BS EN 13165:2001 (including amendments 1 and 2).Presentational conventionsThe provisions of t
11、his standard are presented in roman (i.e. upright) type. Its requirements are presented in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element.Contractual
12、and legal obligationsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. BSI 2006 1BS 4841-5:20061 ScopeThis British Standard speci
13、fies requirements for polyisocyanurate (PIR) and polyurethane (PUR) cored thermally insulated laminated boards (roofboards) with auto-adhesively or separately bonded flexible and/or rigid facings for use in pitched roofs over, under or between rafters.NOTE 1 Because of the changes introduced into th
14、is standard, products conforming to this standard also conform to BS EN 13165:2001 (including amendments 1 and 2).NOTE 2 Additional information for the guidance of users, installers and designers is given in informative Annexes A, B, C and D to this standard.2 Normative referencesThe following refer
15、enced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS EN 822:1995, Thermal insulating products for building applications
16、 Determination of length and widthBS EN 823, Thermal insulating products for building applications Determination of thicknessBS EN 825:1995, Thermal insulating products for building applications Determination of flatnessBS EN 826:1996, Thermal insulating products for building applications Determinat
17、ion of compression behaviourBS EN 1607:1997, Thermal insulating products for building applications Determination of tensile strength perpendicular to facesBS EN 13165:2001, Thermal insulation products for buildings Factory made rigid polyurethane foam (PUR) products SpecificationBS EN 13501-1:2001,
18、Fire classification of construction products and building elements Part 1: Classification using test data from reaction to fire tests3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this part of BS 4841 the following terms and definitions apply.3.1.1 auto-adhesively bonde
19、d facingNOTE These facings can be flexible or rigid.facing that becomes bonded onto the PIR or PUR core during the process of creating it3.1.2 separately bonded facingfacing that is bonded onto the PIR or PUR core in a separate manufacturing processNOTE These facings can be flexible or rigid.BS 4841
20、-5:20062 BSI 20063.1.3 polyisocyanurate productrigid cellular plastics insulation material or product with a substantially closed cell structure mainly based on polymers of the isocyanurate type3.1.4 polyurethane productrigid cellular plastics insulation material or product with a substantially clos
21、ed cell structure mainly based on polymers of the polyurethane type3.2 SymbolsdNnominal thickness of the product in mmDdeclared thermal conductivity in mW/(mK)Sbdeviation from squareness in mm/mSmaxdeviation from flatness in mm/m4 Construction and composition4.1 GeneralThe insulation roofboards shal
22、l consist of an insulating core (4.2) with either two bonded flexible facings (4.3), or two rigid facings (4.4) or one flexible facing (4.3) and one substantial rigid facing (4.4).4.2 Core product typeThe cores of the product type shall be of rigid polyisocyanurate (PIR) or polyurethane (PUR). 4.3 F
23、lexible facingsThe flexible facings of the roofboards shall be either functional or decorative, e.g. paper, metal foil, glass tissue or mineralized glass. NOTE Both faces need not be identical.4.4 Substantial rigid facings4.4.1 GeneralSubstantial rigid facings shall consist of either calcium silicat
24、e (4.4.2)or plasterboard (4.4.3).4.4.2 Calcium silicateWhen tested in accordance with BS EN 13501-1:2002 boards shall have a reaction to fire classification of Euroclass A1 or A2.4.4.3 PlasterboardWhen tested in accordance with BS EN 13501-1: 2002 plasterboard shall have a reaction to fire classific
25、ation of Euroclass A1 or A2.NOTE The type of facings and the degree of their bonding are crucial to ensure good service performance for the laminated insulation roofboards. The BSI 2006 3BS 4841-5:2006degree of bonding, if required, should conform to the requirements given in Annex E when evaluated
26、according to the procedure given in Annex A.5 Requirements5.1 Thermal resistance and thermal conductivity The declared thermal conductivity Dof the flexible faced roofboards or the core product shall be determined in accordance with BS EN 13165:2001 (including amendments 1 and 2). The declared value
27、s of thermal conductivity shall not exceed 29 mW/mK at 10 C.NOTE See also B.1 for information on roofboard design U values and thermal resistance.5.2 Dimensions 5.2.1 Length and width The length and width of boards shall be as specified in Table 1 when measured in accordance with BS EN 822:1995.NOTE
28、 UK manufacturers usually quote for their products lengths and widths with a maximum deviation of 3 mm for those dimensions up to and including 1200 mm. Those with dimensions greater than 1200 mm may have lower tolerances than are quoted in Table 1.5.2.2 ThicknessThickness, d, shall be determined in
29、 accordance with BS EN 823. No test result shall deviate from the nominal thickness, dN, by more than the tolerances given in Table 2 for the declared class. Table 1 Tolerances for lengths and widthsDimensions mmTolerancesmm4000 15Table 2 Classes for thickness tolerancesDimensions in millimetresClas
30、s Nominal thicknesses75TolerancesT1 3 4 +6, 3T2 2 3 +5, 2T3 1.5 1.5 1.5BS 4841-5:20064 BSI 20065.2.3 SquarenessSquareness shall be determined in accordance with BS EN 824. The deviation from squareness on length and width, Sb, shall not exceed 6 mm/m.5.2.4 FlatnessFlatness shall be determined in acc
31、ordance with BS EN 825:1995. The maximum deviation from flatness, Smax, shall not exceed the values given in Table 3.5.3 Compressive strength5.3.1 Normal to the major plane of the roofboardWhen tested in accordance with BS EN 826:1996 the compressive strength of the board shall be not less than 120
32、kPa, which corresponds to the designation CS (10Y) 120 given in BS EN 13165:2001 (including amendments 1 and 2).NOTE See Figure 1.5.3.2 Parallel to the major plane of the roofboardWhen tested in accordance with BS EN 826:1996 the compressive strength of the core shall be not less than 100 kPa, which
33、 corresponds to the designation CS (10Y) 100 given in BS EN 13165:2001 (including amendments 1 and 2).NOTE See Figure 1.Table 3 Deviation from flatnessFull size product lengthmFull size product aream2Deviation from flatnessSmax mm52.5050.7555 0.755 10 BSI 2006 5BS 4841-5:2006Figure 1 Diagram to expl
34、ain orientations for compressive strength measurements5.4 Dimensional stability under specified temperature and humidity conditionsWhen tested in accordance with the procedure in BS EN 13165:2001, Clause 4.2.6 (including amendments 1 and 2) the roofboards shall have a performance of at least DS(TH)5
35、.5.5 Tensile strength normal to the major plane of the boardWhen tested in accordance with BS EN 1607:1997 roofboards shall have a tensile strength of not less than 60 kPa which corresponds to the designation TR60 given in BS EN 13165:2001 (amendments 1 and 2).5.6 Reaction to fire When classified by
36、 the procedure given in BS EN 13501-1 the roofboards shall have a minimum classification of class F. NOTE 1 Class F is also “No performance determined”.NOTE 2 The fire performance of roofboards in isolation is not significant since the UK Building Regulations Approved Document B 1 requires testing o
37、f the complete roofing assembly, of which the roofboard forms an internal part. These assemblies are subject to the requirements of the external fire performance, which is determined by testing according to BS 476-3:2004.NOTE 3 For further information on the reaction to fire performance of PIR or PU
38、R insulating products see Annex C.NOTE 4 It is intended that BS 476-3:2004 will become the fourth method in DD ENV 1187.Normal to the major plane of the board (120 kPa)Parallel to the major plane of the board (100 kPa)Major plane of the boardBS 4841-5:20066 BSI 2006NOTE 5 It should be noted therefor
39、e that the heat source used during testing according to BS 476-3:2004 is applied directly to the roof covering. However, it is required under the European Construction Products Directive for a fire performance to be declared for the product in isolation when it is placed on the market. Accordingly,
40、the way of satisfying this requirement is given in 5.6.6 DesignationNOTE The use of BS EN 13165 in this designation should be interpreted as including amendments 1 and 2.The roofboards shall be given the following designation:“BS 4841-5:2006/BS EN 13165: XX: Y: W”where: XX is the thermal conductivit
41、y in mW/mK (see 5.1); Y is the reaction to fire classification (see 5.6); W is the core type, either PIR or PUR (see 4.2).7 MarkingThe product, packages or invoices shall be marked with at least the following information:a) manufacturers name or trademark;b) product designation as given in Clause 61
42、);c) manufacturers description and/or product reference.1)Marking BS 4841-5:2006/BS EN 13165 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of this specification and BS EN 1
43、3165. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity. BSI 2006 7BS 4841-5:2006Annex A (informative) Method for the determination of areas of unbonded facingsA.1 PrincipleThe unbonded area is esta
44、blished by removing loose facing material after cutting up the specimen.A.2 ApparatusA.2.1 Bandsaw or similar fine toothed saw.A.2.2 Means for measuring the dimensions of unbonded areas with an accuracy of 0.5 mm, e.g. a rule.A.3 Test specimenThe test specimen should be a right parallelepiped with a
45、 length and breadth not exceeding 1200 mm 600 mm. The thickness of the test specimen should be the full thickness of the roofboard laminate including facings.A.4 Number of test specimensOne test specimen should be tested.A.5 ConditioningTest specimens should be conditioned immediately before testing
46、 for a period of not less than 16 h at a temperature of (23 2) C and a relative humidity of (50 5)%.A.6 ProcedureConduct the test at (23 2) C. Mark the test specimen in a manner that identifies the upper and lower faces. Cut the test specimen parallel to either axis into strips 50 mm wide, each stri
47、p being marked so as to identify its original position relative to the other strips (see Figure A.1). Examine both faces of each strip to determine whether any of the facings are not bonded to the core.Remove any areas of facing and measure the unbonded area(s).NOTE 1 The necessity for identifying e
48、ach individual strip and its relative position is to enable unbonded areas of the facing that might extend continuously across more than one strip to be computed as a single area. Individual areas may therefore be computed as well as the sum total of all such areas.NOTE 2 Felt marker pens are most s
49、uitable for marking the edges of the test specimen.A.7 Expression of resultsMeasure all unbonded areas individually as well as the sum total of all such areas and express the results as a percentage of the original area of the test specimen.BS 4841-5:20068 BSI 2006When tested in accordance with A.1 to A.6 roofboards should have no single area of non-adhesion between the facing and the core exceeding 72 cm2, and in total the unbonded areas for any one face should not exceed an are
