1、BRITISH STANDARD BS5803-3: 1985 Incorporating Amendment No. 1 Thermal insulation for use in pitched roof spaces in dwellings Part3: Specification for cellulose fibre thermal insulation for application by blowing UDC699.86:692.42:677.46BS 5803-3:1985 This British Standard, having been prepared under
2、the directionof the Elements andComponents (ofDiverse Materials)for Buildings Standards Committee, was published underthe authority ofthe Board ofBSI and comesintoeffect on 28February1985 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference ECB/38 Draft f
3、or comment83/10119 DC ISBN0 580 14244 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Elements andComponents (of Diverse Materials) for Buildings Standards Committee (ECB/-) to Technical Committee ECB/38 upon which the following bodies
4、 were represented: Chartered Institution of Building Services Consumer Standards Advisory Committee of BSI Department of the Environment (Building Research Establishment, FireResearch Station) Department of the Environment (Housing and Construction Industries) Department of the Environment (Property
5、 Services Agency) Eurisol (UK) (Association of Manufacturers of Mineral Fibre Insulation) Greater London Council Independent Waste Paper Processors Association Institution of Building Control Officers National Association of Loft Insulation Contractors National Council of Building Materials Producer
6、s Royal Institute of British Architects Thermal Insulation Manufacturers Association Amendments issued since publication Amd. No. Date of issue Comments 5829 June 1989 Indicated by a sideline in the marginBS5803-3:1985 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword ii
7、 1 Scope 1 2 Definitions 1 3 Composition and form 1 4 General properties 1 5 Thermal insulation properties 2 6 Preparation of samples 2 7 Marking 2 Appendix A Method for the measurement of the installed thickness, coverage and density of cellulose fire insulation 3 Appendix B Method of test for corr
8、osivity 3 Appendix C Determination of settlement at high humidity 7 Appendix D Determination of vibration settlement and settled density 8 Appendix E Effect of thermal insulation on domestic PVC sheathed electrical cable 10 Appendix F Determination of thermal properties 11 Figure 1 Plan of simulated
9、 loft area for the determination of coverage and installed thickness 5 Figure 2 Measuring device 6 Publications referred to Inside back coverBS 5803-3:1985 ii BSI 08-1999 Foreword This Part of BS5803, having been prepared under the direction of the Elements and Components (of Diverse Materials) for
10、Buildings Standards Committee. This Part covers the requirements for cellulose fibre thermal insulation for application by blowing. Material used for thermal insulation in pitched roof spaces in dwellings should not sustain vermin or encourage the growth of fungus either when dry or wetted with clea
11、n water. It should also be free from objectionable odour when in normal use and when wetted with clean water. As these properties are of a subjective nature it is not possible to derive methods of test for them. They are not therefore included in the requirements for the materials contained in this
12、Part but in considering the applicability of the materials in this Part they have been taken fully into account. BS5803 comprises the following Parts: Part 1: Specification for man-made mineral fibre thermal insulation mats; Part 2: Specification for man-made mineral fibre thermal insulation in pell
13、eted or granular form for application by blowing; Part 3: Specification for cellulose fibre thermal insulation for application by blowing; Part 4: Methods for determining flammability and resistance to smouldering; Part 5: Specification for installation of man-made mineral fibre and cellulose fibre
14、insulation. Certification. It is strongly recommended that in view of the nature of this specification, manufacturers and purchasers make use of the certification facilities described on the inside back cover of this standard. A British Standard does not purport to include all the necessary provisio
15、ns of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 12, an in
16、side back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5803-3:1985 BSI 08-1999 1 1 Scope This Part of BS5803 specifies requirements for cellulose fibre t
17、hermal insulation for installation by blowing in pitched roof spaces in dwellings. This Part does not apply to other forms of thermal insulation, and does not deal with methods of installation of insulating materials or with the general principles of insulation of pitched roofs. NOTEThe titles of th
18、e publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS5803, the definitions given in BS874-1 and BS3533 apply together with the following. 2.1 usage the mass of blown fibre per unit area installed at a given thickness (in kg
19、/m 2 ) 2.2 bag usage rate the number of bags of stated mass per100m 2of insulation installed at a given thickness 2.3 coverage the reciprocal of usage (in m 2 /kg) (seeAppendix A) 2.4 bag coverage rate the coverage multiplied by the stated mass of a bag of insulation (in m 2per bag) 2.5 R value ther
20、mal resistance (in m 2 K/W) assessed at the appropriate thickness (seeAppendix F) 3 Composition and form The insulating material shall be composed of cellulose (wood-based) fibres treated with fire retardant and biocidal additives. The material shall not contain extraneous foreign materials such as
21、metal or glass. 4 General properties 4.1 The material shall not contain water soluble substances likely to accelerate the corrosion of metallic surfaces with which it comes into contact. It shall be deemed to be free from corrosive constituents if, when tested in accordance withAppendix B, no perfor
22、ation of any of the metal coupons is evident. 4.2 The materials shall not exhibit more than5% settlement when tested in accordance withAppendix C. 4.3 The percentage settlement shall not exceed the value declared in item g) ofclause7 when tested in accordance withAppendix D. NOTEThis test is intende
23、d to simulate the effect of traffic vibration, heavy footsteps, door slamming, etc.over a period of many years. 4.4 The material shall have no deleterious effect on PVC or similarly covered electrical wiring. When tested in accordance withAppendix E, the material shall be deemed to be satisfactory i
24、f all four of the cable test pieces show no cracks in their sheathing. Any discoloration of the insulation or discoloration of the cable sheathing, or both, shall be noted as indicative of plasticizer migration, but does not in itself constitute failure. 4.5 When the material is tested at the settle
25、d density in accordance with BS5803-4: a) in the flammability test, the combustion zone shall not extend to within25mm of any part of the timber surround in any of the five specimens tested; and b) in the smouldering resistance test, the combustion zone shall not extend to more than150mm from the ce
26、ntre line of the ignition cylinder on more than one of the first five specimens tested.BS 5803-3:1985 2 BSI 08-1999 If one of the specimens gives a combustion zone extending more than150mm from the centre line of the cylinder, a further set of five specimens shall be tested and they shall all comply
27、 with this requirement. 5 Thermal insulation properties 5.1 The manufacturer shall declare the installed and settled thickness needed to achieve R values of2.0,2.5,3.0,3.5,4.0,4.5 and5.0m 2 K/W after settlement, calculated in accordance withF.4.2 andF.4.1 respectively. NOTEThe installed thickness re
28、quired to yield R values other than those declared by the manufacturer may be determined by interpolation or extrapolation. 5.2 The actual value of R, when calculated in accordance withF.4.3, shall be not less than90% of the manufacturers declared (or interpolated) value. 6 Preparation of samples Sa
29、mples for verification of compliance with the requirements ofclause4 shall be prepared by blowing through a commercially available blowing machine to the average installed density marked on the packaging see item h) ofclause7. 7 Marking Each bag (or package) shall be legibly and indelibly marked wit
30、h the following. a) The number and date of this British Standard, i.e.BS5803-3:1985 1) . b) The manufacturers name, mark or symbol. c) Type of material. d) Action to be taken in the event that the material becomes accidentally soaked. e) Bag mass. f) A table, giving R values and corresponding thickn
31、ess information as specified in5.1, together with coverage information based on the definitions and values given in2.2, 2.4 and items e) and h) of this clause, as follows. g) Maximum percentage settlement. h) Average density as installed and after maximum settlement. i) Thermal conductivity (2) as s
32、ettled density and a mean temperature of10 C. j) Health and safety requirements regarding inhaling or ingesting dust. 1) Marking BS5803-3:1985 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 t
33、he requirements of the standard. The accuracy of such a claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. R value Thickness required Average bag usage rate M
34、aximum bag coverage rate (nottobe exceeded) As installed After maximum settlement m 2 K/W mm mm bags/100m 2 m 2 /bag 2.0 2.5 3.0 3.5 4.0 4.5 5.0BS5803-3:1985 BSI 08-1999 3 Appendix A Method for the measurement of the installed thickness, coverage and density of cellulose fibre insulation A.1 Princip
35、le The installed thickness, coverage and density of cellulose fibre insulation supplied in bags and blown through a commercial unit, set to give its normal delivery rate, into a simulated loft area are determined. A.2 Apparatus A.2.1 Simulated loft area,2450mm 2400mm 100mm deep, constructed in accor
36、dance withFigure 1. A.2.2 Measuring device, constructed in accordance withFigure 2. A.3 Procedure With the blowing nozzle of the commercial unit held horizontally and approximately1m above the simulated loft area, blow the fibre along the spaces between pairs of joists in turn to an approximate dept
37、h of100mm. Carefully remove any material resting on the tops of the joists. Position the measuring device at each of30 locations pre-marked on the joists at the spacing shown inFigure 1. Align the positioning marks on the device with the inner edges of the joists so that the rule is central in a joi
38、st space at the designated location. Take readings by pushing the rule gently downwards until its end contacts the surface of the insulation with the rule vertical. Remove the insulation from between the joists and weigh it to the nearest0.1kg. Take a second set of readings, at the same locations, b
39、y pushing the rule gently downwards until its end contacts the floor of the simulated loft area with the rule vertical. A.4 Calculations A.4.1 Installed thickness Calculate the installed thickness a as the arithmetic mean, to the nearest millimetre, of the difference between the pairs of readings ta
40、ken at each of the30 locations. A.4.2 Coverage Determine the net ceiling area of the simulated loft by subtracting the area covered by the joists from the total area. Calculate the coverage C (in m 2 /kg) using the following equation: where n is the net ceiling area (in m 2 ); m is the mass of insul
41、ation (in kg). A.4.3 Installed density Calculate the installed density i (in kg/m 3 ) using the following equation: where a is the installed thickness (in mm); n is the net ceiling area (in m 2 ); m is the mass of insulation (in kg). Appendix B Method of test for corrosivity B.1 Principle This test
42、is intended to provide a basis for the acceptance or rejection of the level of corrosivity displayedby a fibrous insulation where water may cause chemical constituents to migrate to thin copper or zinc-coated elements adjacent to the insulation. NOTE 1This is an accelerated test and analytical labor
43、atory hygiene is required at all stages. C n m - = i 1 000m an - =BS 5803-3:1985 4 BSI 08-1999 NOTE 2Material passing this test is deemed acceptable when installed adjacent to the thick-sectioned steel components (e.g.nails) which may be present in a loft. Thin-sectional steel components devoid of z
44、inc coating or other protection are at risk in any humid loft environment irrespective of the nature of any insulation present. B.2 Reagents and materials B.2.1 Four metal test coupons, two of copper foil of99.9% purity and two of zinc foil of99.9% purity, each50mm 50mm 0.075mm thick, judged free of
45、 tears, distortions, scratches, perforations, corrosion or other flaws when viewed under and over a40W coiled coil incandescent light bulb. B.2.2 Trichloroethylene, of analytical reagent quality. NOTEAttention is drawn to the possible health risks when using this material. B.2.3 Sulphuric acid, (C)
46、H 2 SO 4 =0.5 mol/L to1 mol/L. B.2.4 Saturated ammonium acetate solution B.3 Apparatus B.3.1 Humidity chamber maintained at40 2 C and90% to95% r.h. B.3.2 Four cylindrical glass crystallizing dishes, well washed, nominally90mm in diameter and50mm deep. B.3.3 Rubber or PVC gloves B.3.4 Stainless steel
47、 spatula B.3.5 TweezersBS 5803-3:1985 BSI 08-1999 5 Figure 1 Plan of simulated loft area for the determination of coverage and installed thicknessBS 5803-3:1985 6 BSI 08-1999 NOTE 1Body of device made from75mm thickness timbers, planed. NOTE 2Feet smooth faced and in same plane, so as to sit on simu
48、lated loft area timbers or collection boxes without rocking. Figure 2 Measuring deviceBS5803-3:1985 BSI 08-1999 7 B.4 Procedure Carry out the procedure as follows. a) Wash each metal coupon successively in two glass dishes of the trichloroethylene to remove any grease or oil, and dry at room tempera
49、ture. At this and all subsequent handling of the coupons, thin rubber or PVC gloves should be worn and tweezers used. b) Take four20g samples of fibrous insulation and mix each with150mL of distilled or deionized water at room temperature in a clean glass beaker. c) Transfer approximately half of one sample of the saturated fibrous insulation, using gloved hands and a clean stainless steel spatula, to one of the crystallizing dishes and tamp level such that a layer of10mm to15mm thickness is formed. Place one of t
