1、Designation: D7445 09D7445 17 An American National StandardStandard Specification forRigid Poly(Vinyl Chloride) (PVC) Siding with Foam PlasticBacking (Backed Vinyl Siding)1This standard is issued under the fixed designation D7445; the number immediately following the designation indicates the year o
2、foriginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This specification establishes requirements for vin
3、yl siding with integral foam plastic backing, where the siding ismanufactured from rigid PVC compound. Performance requirements and test methods addressed by this standard include materialsproperties and dimensions, warp, shrinkage, impact strength, expansion, appearance, and windload wind load resi
4、stance. Methodsof indicating compliance with this specification are also provided.NOTE 1Backed vinyl siding is composed of two major components: the siding and the backing. It is intended that the siding portion comply withSpecification D3679. Applicable portions of Specification D3679 are included
5、in this specification. Additional requirements that pertain only to thebacking as a separate material, or to the combination of siding and backing as a whole, are also included.1.2 Backed vinyl siding shall be tested with the backing material in place or removed, as specified in the applicable requi
6、rementor test method.1.3 The use of PVC recycled plastic in this product shall be in accordance with the requirements in Section 4.1.4 Rigid PVC soffit is covered in Specification D4477.1.5 Siding produced to this specification shall be installed in accordance with Practice D4756. Reference shall al
7、so be made tothe manufacturers installation instructions for the specific product to be installed.NOTE 2Information with regard to siding maintenance shall be obtained from the manufacturer.1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are
8、mathematicalconversions to SI units that are provided for information only and are not considered standard.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety a
9、nd health practices and determine the applicability of regulatorylimitations prior to use.NOTE 3There is no known ISO equivalent to this standard.1.8 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Pr
10、inciples for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD635 Test Method for Rate of Burning and
11、/or Extent and Time of Burning of Plastics in a Horizontal PositionD696 Test Method for Coefficient of Linear Thermal Expansion of Plastics Between 30C and 30C with a Vitreous SilicaDilatometerD883 Terminology Relating to PlasticsD1042 Test Method for Linear Dimensional Changes of Plastics Caused by
12、 Exposure to Heat and MoistureD1435 Practice for Outdoor Weathering of PlasticsD1600 Terminology for Abbreviated Terms Relating to Plastics1 This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.24 on Plastic Building Prod
13、ucts.Current edition approved Feb. 15, 2009June 1, 2017. Published February 2009July 2017. Originally approved in 1979. Last previous edition approved in 2009 asD7445 09. DOI: 10.1520/D7445-09. 10.1520/D7445-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Custo
14、mer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the
15、 previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary o
16、f Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color CoordinatesD2457 Test Met
17、hod for Specular Gloss of Plastic Films and Solid PlasticsD3679 Specification for Rigid Poly(Vinyl Chloride) (PVC) SidingD3892 Practice for Packaging/Packing of PlasticsD4226 Test Methods for Impact Resistance of Rigid Poly(Vinyl Chloride) (PVC) Building ProductsD4477 Specification for Rigid (Unplas
18、ticized) Poly(Vinyl Chloride) (PVC) SoffitD4756 Practice for Installation of Rigid Poly(Vinyl Chloride) (PVC) Siding and SoffitD5206 Test Method for Windload Resistance of Rigid Plastic SidingD5947 Test Methods for Physical Dimensions of Solid Plastics SpecimensD7209 Guide for Waste Reduction, Resou
19、rce Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn2015)3E84 Test Method for Surface Burning Characteristics of Building MaterialsE631 Terminology of Building ConstructionsE1753 Practice for Use of Qualitative Chemical Spot Test Kits for Detection of Lead in Dry Paint Films
20、G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests2.2 ASCE Standard:4ASCE 7-027-10 Minimum Design loads for Buildings and Other Structures2.3 International Code Council:5International Building CodeInternational Residential Code2.4 Vinyl S
21、iding Institute, Inc.:6VSI Vinyl Siding Installation Manual (2015)2.5 Structural Building Components Association:7ANSI/SBCA FS 100-2012 Standard Requirements for Wind Pressure Resistance of Foam Plastic Insulating Sheathing Used inExterior Wall Covering Assemblies3. Terminology3.1 Definitions are in
22、 accordance with Terminologies D883, E631, and D1600, unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 backed vinyl sidinga vinyl cladding product sold with manufacturer-installed foam plastic backing material as anintegral part of the cladding product. The vinyl c
23、ladding portion of backed vinyl siding meets the definition of vinyl siding. Backedvinyl siding is intended to be installed only with the integral backing.3.2.2 backing material; foam plastic backinga layer or layers of plastic that has been intentionally expanded to produce areduced-density plastic
24、 containing voids consisting of open or closed cells distributed throughout the plastic.3.2.3 nominalthe value that a manufacturer consistently uses to represent a specific property or dimension of a vinyl sidingproduct in public claims including, but not limited to, product literature, advertisemen
25、ts, quotations, and certificates ofconformance.3.2.4 process average thicknessthe rolling, arithmetic mean of average specimen thicknesses measured according to 6.5 fora specific product during all productions runs for the most recent six month period.3.2.5 wind load design pressure ratingthe maximu
26、m wind pressure that a backed vinyl siding product is rated to withstand,based on testing under Test Method D5206.3.2.5.1 standard wind load design pressure ratingthe wind load design pressure rating for a siding product when installed 1)over a sheathing material designed and attached such that it i
27、s capable of resisting 100 % of positive and negative wind pressuresoccurring under design conditions at the building location; and 2) with the standard fastening method specified in building codes,general installation instructions, and the siding manufacturers instructions.3.2.5.2 alternative wind
28、load design pressure ratingthe wind load design pressure rating for a siding product when installedover a sheathing not designed and attached such that it is capable of resisting 100 % of positive and negative wind pressuresoccurring under design conditions at the building location, or when the sidi
29、ng is not fastened in the standard way; as specified bythe manufacturer.3.2.5.3 Discussion3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from American Society of Civil Engineers (ASCE), 1801 Alexander Bell Dr., Reston, VA 20191, http:/www.asce.org.5
30、 Available from International Code Council (ICC), 500 New Jersey Ave., NW, 6th Floor, Washington, DC 20001, http:/www.iccsafe.org.6 National Housing Center, 1201 15th Street NW, Suite 220, Washington, DC 20005, http:/www.vinylsiding.org7 6300 Enterprise Lane, Madison, WI 53719, http:/D7445 172The st
31、andard test conditions, configuration, and fastening method used in this specification are specified in 6.14, while alternativesheathing and installation conditions are specified by the manufacturer and must be reflected in the products installationinstructions. Alternative ratings apply only when t
32、he specified sheathing and fastening conditions are used. See Annex A1 forinformation on differences between the standard wind load design pressure rating and alternative wind load design pressure ratings,and how to determine standard and alternative design pressure ratings.3.2.6 temperate northern
33、climatein weather testing, a North American metropolitan area testing site located within 73 to100W longitude and 37 to 45N latitude.3.2.7 vinyl sidinga shaped material, made principally from rigid poly(vinyl chloride) (PVC), that is used to clad exterior wallsof buildings.3.2.7.1 DiscussionAny exce
34、ption to a homogeneous rigid PVC compound is present in a coextruded or laminated capstock.4. Materials and Manufacture4.1 The vinyl siding, exclusive of backing material, shall be made of one or more layers of poly(vinyl chloride) (PVC)compound. Any layers of materials other than poly (vinyl chlori
35、de) (PVC) compound shall be kept to less than 20%20 % byvolume. This limitation does not apply to the backing material.4.2 Where rigid PVC recycled plastic as defined in Guide D7209 is used, the siding containing the PVC recycled plastic shallmeet all of the requirements of 3,Terminology; 4, Materia
36、ls and Manufacture; and 5, Physical Requirements.4.3 The poly(vinyl chloride) siding material, exclusive of backing material, when tested in accordance with Test Method D635,shall not exceed an average extent of burn of 4 in. (100 mm), with an average time of burn not to exceed 10 s.Aminimum samplet
37、hickness of 0.035 in. (0.9 mm) is required. WarningThe flammability testing data, conclusions, and recommendations of TestMethod D635 relate solely to the measurement and description of properties for classification of the poly(vinyl chloride) sidingmaterial in response to flame under controlled lab
38、oratory conditions and shall not be used for the description or appraisal of thefire hazard of vinyl siding under actual fire conditionsconditions.4.4 The foam plastic backing shall have a Flame Spread Index not greater than 75 and a Smoke Developed Index not greaterthan 450 when tested separately u
39、nder method E84.4.5 The PVC compound when extruded into siding shall maintain uniform color and be free of any visual surface or structuralchanges, such as peeling, chipping, cracking, flaking, or pitting.4.6 The PVC compound shall be compounded so as to provide the heat stability and weather exposu
40、re stability required for thesiding market application.4.7 Backed vinyl siding shall not contain elemental lead (Pb) or compounds of that material other than traces incidental to rawmaterials or the manufacturing process. This limitation applies to both PVC substrate and to any cap or film material,
41、 as well asthe backing material. Compliance with this requirement shall be demonstrated by one of the methods in 6.16.5. Physical Requirements5.1 Requirements Applicable to Vinyl SidingThe provisions of 5.1.1 5.1.9 apply only to the vinyl siding, exclusive of anybacking material. Where necessary to
42、perform testing, the backing material shall be removed.5.1.1 Length and WidthThe nominal length and width of the siding shall be as agreed upon between the purchaser and theseller. The actual length shall not be less than 14 in. (6.4 mm) of the nominal length and the actual width shall be within 6 1
43、16in. (1.6 mm) of the nominal width when measured in accordance with 6.3 and 6.4.5.1.2 ThicknessThese requirements pertain only to measurements of the portions of the siding that are exposed afterinstallation of the panel, measured in accordance with the procedure in 6.5. The average thickness of ea
44、ch specimen shall be noless than 0.035 in. No individual measurement shall be thinner than 0.003 in. below the nominal thickness. The process averagethickness as defined in 3.2.4 shall be no thinner than 0.001 in. below the nominal thickness.5.1.3 CamberA full length of siding (typically 10 or 12 ft
45、 (3.05 or 3.61 m) shall not have a camber greater than 18 in. (3.2mm) when measured in accordance with 6.6.5.1.4 Heat ShrinkageThe average heat shrinkage shall not exceed 3.0 % when determined by the method described in 6.7.5.1.5 Impact ResistanceSiding shall have a minimum impact strength of 60 in.
46、lbf (6.78 J) when tested in accordance with6.8.5.1.6 Coeffcient of Linear ExpansionThe siding shall have a coefficient of linear expansion not greater than 4.5 by10-5in./in./F (8.1 by 10-5 mm/mm/C) when tested in accordance with 6.9.D7445 1735.1.7 GlossThe gloss of smooth and embossed siding shall b
47、e uniform across the exposed surface.Variations in the glossmeterreadings for smooth siding shall not be more than 610 % or 65.0 points (whichever is greater). Variations for embossed sidingshall not be more than 620 % or 610.0 points (whichever is greater). Gloss of smooth and embossed siding shall
48、 be tested inaccordance with 6.11.5.1.8 ColorThe color of the siding shall be within the defined color space parameters for the specific color agreed uponbetween the purchaser and the manufacturer. The color specified shall be uniform on the surface of the siding panels, except inthe case of multico
49、lored woodgrain panels.5.1.9 Uniformity of ColorWhen tested in accordance with 6.13, the total color change, E, between a production specimenand the appropriate reference specimen or agreed-upon color coordinates shall not vary by more than 1.5, and the chromaticcoordinates thereof shall not change by more than 6aH = 1.0 and 6bH = 1.0.5.2 Requirements Applicable to Backed Vinyl SidingThe provisions of 5.2.1 5.2.4 apply to backed vinyl siding, includingthe integral foam backing material. Testing shall be cond
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