1、Designation: D7445 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 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 Siding produced to this specification shall be installed inaccordance with Practice D4756. Reference shall also be madeto the manufacturers installation instructions for the specificproduct to be
7、installed.NOTE 2Information with regard to siding maintenance shall beobtained from the manufacturer.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not cons
8、idered standard.1.6 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 the applica-bility of regulatory limitations prior to use
9、.NOTE 3There is no known ISO equivalent to this standard.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations is
10、sued 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 of Plastics in a Horizontal PositionD696 Test Method for
11、 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 MoistureD1435 Practice for Outdoor Weathering of PlasticsD1600 Te
12、rminology 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 Specification for Rigid Poly(Vinyl Chloride) (PVC)Sidi
13、ngD3892 Practice for Packaging/Packing of PlasticsD4226 Test Methods for Impact Resistance of Rigid Poly-(Vinyl Chloride) (PVC) Building ProductsD4756 Practice for Installation of Rigid Poly(Vinyl Chlo-ride) (PVC) Siding and SoffitD5206 Test Method for Windload Resistance of Rigid Plas-tic SidingD59
14、47 Test Methods for Physical Dimensions of SolidPlastics Specimens1This 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 Jan. 1, 2018. Published February 2018. Origina
15、llyapproved in 1979. Last previous edition approved in 2017 as D7445 17. DOI:10.1520/D7445-18.2For 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
16、 Summary 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 p
17、rinciples 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.1D7209 Guide for Waste Reduction, Resource Recovery, andUse of Recycled
18、Polymeric Materials and Products (With-drawn 2015)3D7793 Specification for Insulated Vinyl SidingE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE631 Terminology of Building ConstructionsE1753 Practice for Use of Qualitative Chemical Spot TestKits for Detection of Lead in Dry
19、 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 International Code Council:5International Building CodeInternational Residential Code2.4
20、 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 Insulating SheathingUsed in Exterior Wall Covering Assemblies3. Terminology3.1 Definitions
21、 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-installed foam plastic backing material asan integral part of the cladding product. The vi
22、nyl 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 orlayers of plastic that has been intentionally expanded toproduce a reduced-density plast
23、ic 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 product in public claims including, but not limited to,product literature, advertisement
24、s, 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 themost recent six month period.3.2.5 wind load design pressure ratingthe maximum w
25、indpressure 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 wheninstalled 1) over a sheathing material designed and attachedsuch that it is capa
26、ble 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 installationinstructions, and the siding manufacturers instructions.3.2.5.2 alternative wind load des
27、ign 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 occurring under design conditions at the buildinglocation, or when the siding is not f
28、astened 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 sheathing and installa-tion conditions are specified by the manufacturer and must berefle
29、cted 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 design pressure ratingand alternative wind load design pressure ratings, and how to
30、determine 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.3.2.7 vinyl sidinga shaped material, made principallyfrom rigid poly(vinyl chloride)
31、 (PVC), that is used to cladexterior walls of buildings; in this standard, vinyl siding refersto the rigid profile to which the backing material is attached.3.2.7.1 DiscussionAny exception to a homogeneous rigidPVC compound is present in a coextruded or laminatedcapstock.4. Materials and Manufacture
32、4.1 The vinyl siding, 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 W
33、here rigid PVC recycled 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,
34、 when tested in accordance 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, andrecommendations of Test Met
35、hod D635 relate solely to the3The last approved version of this historical 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 A
36、ve., NW,6th Floor, Washington, DC 20001, http:/www.iccsafe.org.6National Housing Center, 1201 15th Street NW, Suite 220, Washington, DC20005, http:/www.vinylsiding.org76300 Enterprise Lane, Madison, WI 53719, http:/D7445 182measurement and description of properties for classification ofthe poly(viny
37、l chloride) siding 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 Deve
38、loped Index notgreater 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
39、so as toprovide the 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
40、both PVC substrate 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 5.1.8 apply only to the vinyl siding,
41、exclusiveof any backing 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 nomina
42、l length and the 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 t
43、heprocedure in 6.5. 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
44、 full length of siding (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 shal
45、l have a minimumimpact 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 smo
46、oth and embossed vinylsiding shall be uniform across the exposed surface. Theaverage of all readings for a panel determined in 6.11.2.5 shallnot differ from the manufacturers specified gloss value morethan the permitted variation in Table 1, and each individualreading shall not vary more than 10 poi
47、nts from the average.Gloss of smooth and embossed vinyl siding shall be tested inaccordance with 6.11.5.1.8 Uniformity of ColorThe color specified shall beuniform on the exposed surface of the vinyl siding panels,except on the case of variegated colors. When tested inaccordance with 6.13, the total
48、color change, E, between aproduction specimen and the appropriate reference specimen oragreed-upon color coordinates shall not vary by more than 1.5,and the chromatic coordinates thereof shall not change by morethan 6aH= 1.0 and 6bH= 1.0.5.1.9 Weathering:5.1.9.1 The vinyl siding shall maintain a uni
49、form color andbe free of any visual surface or structural changes such aspeeling, chipping, cracking, flaking, and pitting when tested inaccordance with 6.10.NOTE 4Weathering-conformance-testing requirements are to reflectperformance of a “typical” extrusion siding profile representing a specificcolor of PVC compound and a specific extrusion technology. In no case isthere an implied requirement for testing all the various shaped and sizedsiding profiles produced in this color. The lengthy outdoor weatherabilitytes
