Designation:D7445−09AnAmericanNationalStandardStandardSpecificationforRigidPoly(VinylChloride)(PVC)SidingwithFoamPlasticBacking(BackedVinylSiding)1ThisstandardisissuedunderthefixeddesignationD7445;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationestablishesrequirementsforvinylsidingwithintegralfoamplasticbacking,wherethesidingismanufacturedfromrigidPVCcompound.Performancere-quirementsandtestmethodsaddressedbythisstandardincludematerialspropertiesanddimensions,warp,shrinkage,impactstrength,expansion,appearance,andwindloadresistance.Methodsofindicatingcompliancewiththisspecificationarealsoprovided.NOTE1—Backedvinylsidingiscomposedoftwomajorcomponents:thesidingandthebacking.ItisintendedthatthesidingportioncomplywithSpecificationD3679.ApplicableportionsofSpecificationD3679areincludedinthisspecification.Additionalrequirementsthatpertainonlytothebackingasaseparatematerial,ortothecombinationofsidingandbackingasawhole,arealsoincluded.1.2Backedvinylsidingshallbetestedwiththebackingmaterialinplaceorremoved,asspecifiedintheapplicablerequirementortestmethod.1.3TheuseofPVCrecycledplasticinthisproductshallbeinaccordancewiththerequirementsinSection4.1.4RigidPVCsoffitiscoveredinSpecificationD4477.1.5SidingproducedtothisspecificationshallbeinstalledinaccordancewithPracticeD4756.Referenceshallalsobemadetothemanufacturer’sinstallationinstructionsforthespecificproducttobeinstalled.NOTE2—Informationwithregardtosidingmaintenanceshallbeobtainedfromthemanufacturer.1.6Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibility...
