ASTM_D_4756_-_15_2021.pdf

Designation:D475615(Reapproved 2021)An American National StandardStandard Practice forInstallation of Rigid Poly(Vinyl Chloride)(PVC)Siding andSoffit1This standard is issued under the fixed designation D4756;the number immediately following the designation indicates the year oforiginal 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.Scope1.1 This practice covers the basic requirements for and themethods of installation of rigid vinyl siding,soffits,andaccessories on the exterior wall and soffit areas of buildings.Inall applications,refer also to the specific manufacturersinstallation instructions and the requirements of applicablebuilding codes.1.2 This practice covers aspects of installation relating toeffectiveness and durability in service.1.3 The various application systems are located in thefollowing sections of this practice:Substrate,Surface PreparationSection 8Application of Horizontal SidingSection 9Application of Vertical SidingSection 10Application of Soffits and FasciaSection 11Special DetailsSection 121.4 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 considered standard.1.5 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1There is no known ISO equivalent to this standard.1.6 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 issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3679 Specification for Rigid Poly(Vinyl Chloride)(PVC)SidingD4477 Specification for Rigid(Unplasticized)Poly(VinylChloride)(PVC)SoffitE631 Terminology of Building ConstructionsE2112 Practice for Installation of Exterior Windows,Doorsand Skylights3.Terminology3.1 GeneralDefinitions are in accordance with Terminolo-gies D883 and E631 and abbreviations with TerminologyD1600 unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 backerboarda flat material used on the face of thehouse,applied between the studs and the siding(or overexisting wall surface)to provide an even surface for theinstallation of the vinyl siding.3.2.2 buttlockthe bottom of a siding or soffit panel,oraccessory piece,opposite the nail hem,which locks onto thepreceding panel.3.2.3 crimpsmall protrusions,typically approximately12in.(12.7 mm)long,18in.(3.2 mm)wide,and projecting18in.(3.2 mm)formed by a crimper(snaplock punch).(See Fig.2.)3.2.4 crimpera special hand tool designed to form crimps(snaplock ears)intended to hold partial panels in place.(SeeFig.2.)3.2.5 face nailthe action of fastening directly on to the“face,”or exposed surface,of a panel(instead of using the nailslot).1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.24 on Plastic Building Products.Current edition approved Jan.15,2021.Published January 2021.Originallyapproved in 1991.Last previous edition approved in 2015 as D4745 15.DOI:10.1520/D4756-15R21.2For 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 Summary page onthe ASTM website.Copyright 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 principles 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.13.2.6 fasciathe trim covering the ends of roof rafters.(SeeFig.1.)3.2.6.1 fascia boarda board attached to the ends of therafters between the roofing material and the soffit overhang.3.2.6.2 fascia cap or coverthe covering around a fasciaboard.3.2.7 flashingspecial membrane pieces or manufacturedtrim pieces used to supplement siding panels in weatherprotection around joints,penetrations,and openings,such aswindows,doors,mechanical penetrations,and roof-wallintersections,designed and intended to move incidental waterto the building exterior.3.2.8 furring/furring stripa wooden or steel framingmaterial,us