b'CLASS A ROOFSClass A roofing remains an important fire-performance benchmark in British Columbia, particularly as wildfire risk becomes a more prominent building enclosure and roofing design consideration.howauthorityandresponsibilityare distributedacrossthedesignand construction process.The ultimate authority on Class A acceptanceistheAHJ.Testlabora-tories,manufacturersandengineers providesupportingdocumentation, but none approve construction in the field.Whereanassemblymatchesa recognized listing, acceptance is usually straightforward.Wheresubstitutions or engineering judgment are involved, acceptance becomes discretionary.Responsibilityforcomplianceis distributedacrosstheprojectteam. ArchitectsmayspecifyClassA without identifying a specific assembly. Fire protection engineers may or may notbeinvolved.Buildingenclosure engineersandstructuralengineers influencekeyelementsaffectingfire performance but are not always tasked with verifying Class A compliance.Roofingcontractorsoccupya unique position. They are often the first to recognize when a Class A require-Pioneers of Taperedment cannot be achieved as designed orspecified.Inmanycases,theyare Insulation Systems implicitly expected to identify conflicts Our full-service systems,and either raise them for resolution or designed to slope to drain, haveresolve them in the field. This places been installed on thousands ofresponsibilityoncontractorsthatis successful roofs nationwide. not defensible without a clearly defined design and approval process.Learn more about ourFailures typically occur at handoff products and services. points:whenClassAisspecified without a tested assembly, substitutions occur without reassessment or assump-tions carry forward unchallenged.20 lROOFINGBClSPRING 2026'