b'CLASS A ROOFSClass A performance is listing-specific and can be sensitive at roof edges and eaves, where terminations, edge metals and exposed combustible substrates can undermine the roof cover above.tible decks often require fire- / heat-re-sistant layers to limit heat transfer and fire penetration.Figures 1 and 2 illustrate typical layers in low-slope (waterproofing) and sloped (water-shedding)ClassAroofassem-blies.Theselayersareillustrativeonly. Class A listings vary, and not all compo-nents shown are required.EDGE TREATMENTClassAperformanceislisting-specific and can be sensitive at roof edges and eaves, where terminations, edge metals and exposed combustible substrates can undermine the roof cover above. Eave / edge construction should follow manu-facturerrequirementsoranynotesin the testing / listing documentation. Any substitutionsattheselocationsshould betreatedaspotentiallisting-breaking changes unless explicitly verified.In the absence of assembly-specific direction, eaves and roof edges should bedetailedtobeasnon-combustible and tightly closed as practicable, mini-mizing exposed combustible substrates andeliminatinggapsorcavitiesthat could undermine the roof build-up.HOW TO FIND A CLASS AROOF COVERINGAgoodrouteforfindinganappro-priate Class A roof cover is to start by searchingrecognizedlistingdirecto-ries for a Class-A-listed roof assembly that matches your roof type and deck (thisistypicallythemostdefensible route).Commonlistingagenciesare FM Approvals, Intertek, UL Solutions, CSA Group and QAI Laboratories. If a www.rcabc.orgl15'