1、Designation: D7445 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 oforigina
2、l 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 vinylsiding with
3、integral foam plastic backing, where the siding ismanufactured from rigid PVC compound. Performance re-quirements and test methods addressed by this standard includematerials properties and dimensions, warp, shrinkage, impactstrength, expansion, appearance, and wind load resistance.Methods of indica
4、ting compliance with this specification arealso provided.NOTE 1Backed vinyl siding is composed of two major components:the siding and the backing. It is intended that the siding portion complywith Specification D3679.Applicable portions of Specification D3679 areincluded in this specification. Addit
5、ional requirements that pertain only tothe backing as a separate material, or to the combination of siding andbacking as a whole, are also included.1.2 Backed vinyl siding shall be tested with the backingmaterial in place or removed, as specified in the applicablerequirement or test method.1.3 The u
6、se of PVC recycled plastic in this product shall bein 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 inaccordance with Practice D4756. Reference shall also be madeto the manufacturers i
7、nstallation instructions for the specificproduct to be installed.NOTE 2Information with regard to siding maintenance shall beobtained from the manufacturer.1.6 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units
8、 that are provided for information onlyand are not considered standard.1.7 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine th
9、e applica-bility of regulatory limitations prior to use.NOTE 3There is no known ISO equivalent to this standard.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of
10、International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers 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 andTime of Burning o
11、f Plastics in a Horizontal PositionD696 Test Method for Coefficient of Linear Thermal Expan-sion of Plastics Between 30C and 30C with a VitreousSilica DilatometerD883 Terminology Relating to PlasticsD1042 Test Method for Linear Dimensional Changes ofPlastics Caused by Exposure to Heat and MoistureD1
12、435 Practice for Outdoor Weathering of PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD2457 Test Method for Specular Gloss of Plastic Films andSolid PlasticsD3679
13、 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 (Unplasticized) Poly(VinylChloride) (PVC) SoffitD4756 Practice for Ins
14、tallation of Rigid Poly(Vinyl Chlo-ride) (PVC) Siding and Soffit1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.24 on Plastic BuildingProducts.Current edition approved June 1, 2017. Published July 2017. Originally ap
15、provedin 1979. Last previous edition approved in 2009 as D7445 09. DOI: 10.1520/D7445-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summ
16、ary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized princi
17、ples on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1D5206 Test Method for Windload Resistance of Rigid Plas-tic SidingD5947 Test
18、 Methods for Physical Dimensions of SolidPlastics SpecimensD7209 Guide for Waste Reduction, Resource Recovery, andUse of Recycled Polymeric Materials and Products (With-drawn 2015)3E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE631 Terminology of Building ConstructionsE1753
19、 Practice for Use of Qualitative Chemical Spot TestKits for Detection of Lead in Dry Paint FilmsG147 Practice for Conditioning and Handling of Nonmetal-lic Materials for Natural and Artificial Weathering Tests2.2 ASCE Standard:4ASCE 7-10 Minimum Design loads for Buildings and OtherStructures2.3 Inte
20、rnational Code Council:5International Building CodeInternational 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 WindPressure Resistance of Foam Plastic Insula
21、ting SheathingUsed in Exterior Wall Covering Assemblies3. 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 soldwith manufacturer-instal
22、led foam plastic backing material asan integral part of the cladding product. The vinyl claddingportion of backed vinyl siding meets the definition of vinylsiding. Backed vinyl siding is intended to be installed only withthe integral backing.3.2.2 backing material; foam plastic backinga layer orlaye
23、rs of plastic that has been intentionally expanded toproduce a reduced-density plastic containing voids consistingof open or closed cells distributed throughout the plastic.3.2.3 nominalthe value that a manufacturer consistentlyuses to represent a specific property or dimension of a vinylsiding prod
24、uct in public claims including, but not limited to,product literature, advertisements, quotations, and certificatesof conformance.3.2.4 process average thicknessthe rolling, arithmeticmean of average specimen thicknesses measured according to6.5 for a specific product during all productions runs for
25、 themost recent six month period.3.2.5 wind load design pressure ratingthe maximum windpressure that a backed vinyl siding product is rated towithstand, based on testing under Test Method D5206.3.2.5.1 standard wind load design pressure ratingthewind load design pressure rating for a siding product
26、wheninstalled 1) over a sheathing material designed and attachedsuch that it is capable of resisting 100 % of positive andnegative wind pressures occurring under design conditions atthe building location; and 2) with the standard fasteningmethod specified in building codes, general installationinstr
27、uctions, and the siding manufacturers instructions.3.2.5.2 alternative wind load design pressure ratingthewind load design pressure rating for a siding product wheninstalled over a sheathing not designed and attached such thatit is capable of resisting 100 % of positive and negative windpressures oc
28、curring under design conditions at the buildinglocation, or when the siding is not fastened in the standard way;as specified by the manufacturer.3.2.5.3 DiscussionThe standard test conditions,configuration, and fastening method used in this specificationare specified in 6.14, while alternative sheat
29、hing and installa-tion conditions are specified by the manufacturer and must bereflected in the products installation instructions. Alternativeratings apply only when the specified sheathing and fasteningconditions are used. See Annex A1 for information on differ-ences between the standard wind load
30、 design pressure ratingand alternative wind load design pressure ratings, and how todetermine standard and alternative design pressure ratings.3.2.6 temperate northern climatein weather testing, aNorth American metropolitan area testing site located within73 to 100W longitude and 37 to 45N latitude.
31、3.2.7 vinyl sidinga shaped material, made principallyfrom rigid poly(vinyl chloride) (PVC), that is used to cladexterior walls of buildings.3.2.7.1 DiscussionAny exception to a homogeneous rigidPVC compound is present in a coextruded or laminatedcapstock.4. Materials and Manufacture4.1 The vinyl sid
32、ing, exclusive of backing material, shall bemade of one or more layers of poly(vinyl chloride) (PVC)compound. Any layers of materials other than poly (vinylchloride) (PVC) compound shall be kept to less than 20 % byvolume. This limitation does not apply to the backing material.4.2 Where rigid PVC re
33、cycled plastic as defined in GuideD7209 is used, the siding containing the PVC recycled plasticshall meet all of the requirements of 3,Terminology; 4, Mate-rials and Manufacture; and 5, Physical Requirements.4.3 The poly(vinyl chloride) siding material, exclusive ofbacking material, when tested in a
34、ccordance with Test MethodD635, shall not exceed an average extent of burn of 4 in. (100mm), with an average time of burn not to exceed 10 s. Aminimum sample thickness of 0.035 in. (0.9 mm) is required.WarningThe flammability testing data, conclusions, and3The last approved version of this historica
35、l standard is referenced onwww.astm.org.4Available from American Society of Civil Engineers (ASCE), 1801 AlexanderBell Dr., Reston, VA 20191, http:/www.asce.org.5Available from International Code Council (ICC), 500 New Jersey Ave., NW,6th Floor, Washington, DC 20001, http:/www.iccsafe.org.6National
36、Housing Center, 1201 15th Street NW, Suite 220, Washington, DC20005, http:/www.vinylsiding.org76300 Enterprise Lane, Madison, WI 53719, http:/D7445 172recommendations of Test Method D635 relate solely to themeasurement and description of properties for classification ofthe poly(vinyl chloride) sidin
37、g material in response to flameunder controlled laboratory conditions and shall not be used forthe description or appraisal of the fire hazard of vinyl sidingunder actual fire conditions.4.4 The foam plastic backing shall have a Flame SpreadIndex not greater than 75 and a Smoke Developed Index notgr
38、eater than 450 when tested separately under method E84.4.5 The PVC compound when extruded into siding shallmaintain uniform color and be free of any visual surface orstructural changes, such as peeling, chipping, cracking, flaking,or pitting.4.6 The PVC compound shall be compounded so as toprovide t
39、he heat stability and weather exposure stabilityrequired for the siding market application.4.7 Backed vinyl siding shall not contain elemental lead(Pb) or compounds of that material other than traces incidentalto raw materials or the manufacturing process. This limitationapplies to both PVC substrat
40、e and to any cap or film material,as well as the backing material. Compliance with this require-ment shall be demonstrated by one of the methods in 6.16.5. Physical Requirements5.1 Requirements Applicable to Vinyl SidingThe provi-sions of 5.1.1 5.1.9 apply only to the vinyl siding, exclusiveof any b
41、acking material. Where necessary to perform testing,the backing material shall be removed.5.1.1 Length and WidthThe nominal length and width ofthe siding shall be as agreed upon between the purchaser andthe seller. The actual length shall not be less than14 in. (6.4mm) of the nominal length and the
42、actual width shall be within6116 in. (1.6 mm) of the nominal width when measured inaccordance with 6.3 and 6.4.5.1.2 ThicknessThese requirements pertain only to mea-surements of the portions of the siding that are exposed afterinstallation of the panel, measured in accordance with theprocedure in 6.
43、5. The average thickness of each specimen shallbe no less than 0.035 in. No individual measurement shall bethinner than 0.003 in. below the nominal thickness. Theprocess average thickness as defined in 3.2.4 shall be nothinner than 0.001 in. below the nominal thickness.5.1.3 CamberA full length of s
44、iding (typically 10 or 12 ft(3.05 or 3.61 m) shall not have a camber greater than18 in.(3.2 mm) when measured in accordance with 6.6.5.1.4 Heat ShrinkageThe average heat shrinkage shall notexceed 3.0 % when determined by the method described in 6.7.5.1.5 Impact ResistanceSiding shall have a minimumi
45、mpact strength of 60 in.lbf (6.78 J) when tested in accordancewith 6.8.5.1.6 Coeffcient of Linear ExpansionThe siding shallhave a coefficient of linear expansion not greater than 4.5 by10-5in./in./F (8.1 by 10-5mm/mm/C) when tested in accor-dance with 6.9.5.1.7 GlossThe gloss of smooth and embossed
46、sidingshall be uniform across the exposed surface. Variations in theglossmeter readings for smooth siding shall not be more than610%or65.0 points (whichever is greater). Variations forembossed siding shall not be more than 620%or610.0points (whichever is greater). Gloss of smooth and embossedsiding
47、shall be tested in accordance with 6.11.5.1.8 ColorThe color of the siding shall be within thedefined color space parameters for the specific color agreedupon between the purchaser and the manufacturer. The colorspecified shall be uniform on the surface of the siding panels,except in the case of mul
48、ticolored woodgrain panels.5.1.9 Uniformity of ColorWhen tested in accordance with6.13, the total color change, E, between a production speci-men and the appropriate reference specimen or agreed-uponcolor coordinates shall not vary by more than 1.5, and thechromatic coordinates thereof shall not cha
49、nge by more than6aH= 1.0 and 6bH= 1.0.5.2 Requirements Applicable to Backed Vinyl SidingTheprovisions of 5.2.1 5.2.4 apply to backed vinyl siding,including the integral foam backing material. Testing shall beconducted with the backing material in place, as described inthe referenced test method.5.2.1 Surface DistortionThe siding shall be free of bulges,waves, and ripples when tested to a minimum temperature of120F (49C) in accordance with the procedure in 6.12. Thisdistortion is called “oil-canning.”5.2.2 Wea
