Designation:D7793−21StandardSpecificationforInsulatedVinylSiding1ThisstandardisissuedunderthefixeddesignationD7793;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationestablishesrequirementsforinsulatedvinylsiding,whichisvinylsidingwithintegralfoamplasticinsulatingmaterial,wherethevinylsidingismanufacturedfromrigidPVCcompound.Compliancewiththisstandardrequiresinsulatedvinylsidingtodemonstrateathermalinsu-lationvalueofR-2.0orgreater.Otherperformancerequire-mentsandtestmethodsaddressedbythisstandardincludematerialspropertiesanddimensions,warp,shrinkage,impactstrength,expansion,appearance,thermaldistortionresistance,flamespread,andwindloadresistance.Methodsofindicatingcompliancewiththisspecificationarealsoprovided.NOTE1—Insulatedvinylsidingiscomposedoftwomajorcomponents:thevinylsidingandtheinsulatingmaterial.ItisintendedthatthevinylsidingportioncomplywithSpecificationD3679.ApplicableportionsofSpecificationD3679areincludedinthisspecification.Additionalrequire-mentsthatpertainonlytotheinsulationasaseparatematerial,ortothecombinationofvinylsidingandinsulationasawhole,arealsoincluded.Forfurtherexplanation,seeAppendixX1.1.2Insulatedvinylsidingshallbetestedwiththeinsulationmaterialinplaceorremoved,asspecifiedintheapplicablerequirementortestmethod.1.3TheuseofPVCrecycledplasticinthisproductshallbeinaccordancewiththerequirementsinSection4.1.4InsulatedvinylsidingproducedtothisspecificationshallbeinstalledinaccordancewithPracticeD4756.Refer-enceshallalsobemadetothemanufacturer’sinstallationinstructionsforthespecificproducttobeinstalled.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurport...
