1、Designation: D7445 17D7445 18 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*1.1 This specification establishes requirements for vinyl sid
3、ing 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 wind load resistance. Methods
4、 ofindicating 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 in this specifi
5、cation. 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 requirementor test m
6、ethod.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 D4477.1.4 Siding produced to this specification shall be installed in accordance with Practice D4756. Reference shall also be made toth
7、e manufacturers installation instructions for the specific product to be installed.NOTE 2Information with regard to siding maintenance shall be obtained from the manufacturer.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalcon
8、versions to SI units that are provided for information only and are not considered standard.1.6 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 and health pract
9、ices and determine the applicability of regulatorylimitations prior to use.NOTE 3There is no known ISO equivalent to this standard.1.7 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for th
10、e 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/or Extent and
11、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 Exposure to He
12、at 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 Products.Current ed
13、ition approved June 1, 2017Jan. 1, 2018. Published July 2017February 2018. Originally approved in 1979. Last previous edition approved in 20092017 asD7445 09.D7445 17. DOI: 10.1520/D7445-17.10.1520/D7445-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer
14、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 pre
15、vious 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 of Ch
16、anges 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 Method
17、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 (Unplastici
18、zed) 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, Resource
19、Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn2015)3D7793 Specification for Insulated Vinyl SidingE84 Test Method for Surface Burning Characteristics of Building MaterialsE631 Terminology of Building ConstructionsE1753 Practice for Use of Qualitative Chemical Spot Test Kit
20、s for Detection of Lead in Dry Paint FilmsG147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests2.2 ASCE Standard:4ASCE 7-10 Minimum Design loads for Buildings and Other Structures2.3 International Code Council:5International Building CodeInt
21、ernational Residential Code2.4 Vinyl Siding 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 Assembli
22、es3. Terminology3.1 Definitions are in 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 par
23、t of the cladding product. The vinyl cladding 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 expand
24、ed to produce areduced-density plastic 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 limite
25、d to, product literature, advertisements, 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
26、 load design pressure ratingthe maximum 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 materia
27、l designed and attached such that it is 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
28、instructions.3.2.5.2 alternative wind 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 t
29、he building location, or when the siding is not fastened in the standard way; as specified bythe manufacturer.3 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,
30、http:/www.asce.org.5 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, h
31、ttp:/D7445 1823.2.5.3 DiscussionThe standard 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.
32、 Alternative ratings apply only when the 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 pres
33、sure ratings.3.2.6 temperate northern 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 wallso
34、f buildings. buildings; in this standard, vinyl siding refers to the rigid profile to which the backing material is attached.3.2.7.1 DiscussionAny exception to a homogeneous rigid PVC compound is present in a coextruded or laminated capstock.4. Materials and Manufacture4.1 The vinyl siding, exclusiv
35、e 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 chloride) (PVC) compound shall be kept to less than 20 % by volume.This limitation does not apply to the backing material.4.2 Where rigid PVC recycled plas
36、tic as defined in Guide D7209 is used, the siding containing the PVC recycled plastic shallmeet all of the requirements of 3,Terminology; 4, Materials and Manufacture; and 5, Physical Requirements.4.3 The poly(vinyl chloride) siding material, exclusive of backing material, when tested in accordance
37、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 samplethickness of 0.035 in. (0.9 mm) is required. WarningThe flammability testing data, conclusions, and recommendations of TestMethod D635 relate solely to t
38、he measurement and description of properties for classification of the poly(vinyl chloride) sidingmaterial in response to flame under controlled laboratory conditions and shall not be used for the description or appraisal of thefire hazard of vinyl siding under actual fire conditions.4.4 The foam pl
39、astic backing shall have a Flame Spread Index not greater than 75 and a Smoke Developed Index not greaterthan 450 when tested separately under 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 peelin
40、g, chipping, cracking, flaking, or pitting.4.6 The PVC compound shall be compounded so as to provide the heat stability and weather exposure stability required for thesiding market application.4.7 Backed vinyl siding shall not contain elemental lead (Pb) or compounds of that material other than trac
41、es incidental to rawmaterials or the manufacturing process. This limitation applies to both PVC substrate and to any cap or film material, 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 App
42、licable to Vinyl SidingThe provisions of 5.1.1 5.1.85.1.9 apply only to the vinyl siding, exclusive ofany backing material. Where necessary to 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 p
43、urchaser 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 116in. (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 portio
44、ns of the siding that are exposed afterinstallation of the panel, measured in accordance with the procedure in 6.5. The average thickness of each specimen shall be noless than 0.035 in. No individual measurement shall be thinner than 0.003 in. below the nominal thickness. The process averagethicknes
45、s 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 (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 sha
46、ll 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.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
47、.5 by10-5in./in./F (8.1 by 10-5 mm/mm/C) when tested in accordance with 6.9.D7445 1835.1.7 GlossThe gloss of smooth and embossed vinyl siding shall be uniform across the exposed surface. Variations in theglossmeter readings for smooth siding The average of all readings for a panel determined in 6.11
48、.2.5 shall not be more than 610% or 65.0differ from the manufacturers specified gloss value more than the permitted variation in Table 1points (whichever isgreater). Variations for embossed siding shall not be more than620 % or610.0 points (whichever is greater)., and each individualreading shall no
49、t vary more than 10 points from the average. Gloss of smooth and embossed vinyl siding shall 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 multicolored woodgrain panels.5.1.8 Uniformity of ColorThe color specified shall be uniform on the exposed surface of the vinyl sid
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