Designation:D6705/D6705M−04(Reapproved2011)´1StandardGuideforRepairandRecoatofSprayPolyurethaneFoamRoofingSystems1ThisstandardisissuedunderthefixeddesignationD6705/D6705M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.´1NOTE—UnitsinformationandthereferencedCPIdocumentwereeditoriallyrevisedinJune2011.1.Scope1.1Thisguidecoverstheproceduresfortherepairandrecoatingofexistingspraypolyurethaneroofingsystems.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C1029SpecificationforSpray-AppliedRigidCellularPoly-urethaneThermalInsulationD5469GuideforApplicationofNewSprayAppliedPoly-urethaneFoamandCoatedRoofingSystemsD6083SpecificationforLiquidAppliedAcrylicCoatingUsedinRoofing2.2SPFAStandards:3AY102AGuideforSelectionofElastomericProtectiveCoatingsOverSprayedPolyurethaneFoamAY107SprayPolyurethaneFoamBlisters,TheirCauses,Types,PreventionandRepair2.3CPIStandard:4CenterforThePolyurethaneIndustry(CPI),BulletinAX119GuideforSafeHandlingandUseofPolyurethaneandPolyisocyanurateFoamSystems3.Terminology3.1Definitions:3.1.1recoat—toapplyanewprotectivecoatingoveranexistingcoatedSPF(spraypolyurethanefoam)roofsystemtoextendtheperformancelifeoftheroofingsystem.3.1.2scarfing—toshaveorgrindanSPFfoamsurfacemechanicallytoremoveacoating,orUVdeterioratedSPF,orboth,torefoamorrecoatthesurface.4.Sig...
