Designation:C1289−17StandardSpecificationforFacedRigidCellularPolyisocyanurateThermalInsulationBoard1ThisstandardisissuedunderthefixeddesignationC1289;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversthegeneralrequirementsforfacedthermalinsulationboardscomposedofrigidcellularpolyisocyanuratesurfacedwithothermaterials.Theinsulationboardsareintendedforuseattemperaturesbetween−40and200°F(−40and93°C).Thisspecificationdoesnotcovercryogenicapplications.Consultthemanufacturerforspecificrecommendationsandpropertiesincryogenicconditions.Forspecificapplications,theactualtemperaturelimitsshallbeagreeduponbythemanufacturerandthepurchaser.1.2Thisstandardisintendedtoapplytorigidcellularpolyurethane-modifiedpolyisocyanuratethermalinsulationboardproductsthatarecommerciallyacceptableasnon-structuralpanelsusefulinbuildingconstruction.Thetermpolyisocyanurateencompassesthetermpolyurethane.Forengineeringanddesignpurposes,usersshouldfollowspecificproductinformationprovidedbyboardmanufacturersregard-ingphysicalproperties,systemdesignconsiderationsandinstallationrecommendations.NOTE1—SeeAppendixX1forguidanceondeterminingwindpressureresistanceofpanelswhenrequiredforwallsheathingapplications.1.3Theuseofthermalinsulationmaterialscoveredbythisspecificationistypicallyregulatedbybuildingcodes,orotheragenciesthataddressfireperformance.Whererequired,thefireperformanceofthematerialshallbeaddressedthroughstan-dardfiretestmethodsestablishedbytheappropriategoverningdocuments.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.NOTE2—Forconversiontometricun...
