b'CLASS A ROOFSWHAT DOES A CLASS A RATING resist fire penetration fromunderstoodasaspecificfire-perfor- ACTUALLY MEAN? burning brands. mance threshold, not a comprehensive A Class A rating is the highest fire clas- Duringtesting,thecompleteroofmeasure of roof resilience.sificationassignedtoroofassembliesassemblyisconstructedasspecifiedIt also does not evaluate fire resistance under standardized fire testing in Canadaand exposed to flame and embers underfrom the interior (i.e., a fire originating andtheUnitedStates.Theratingiscontrolledconditions.WhatClassA establishedthroughlarge-scalelabora- testing does prove is that an assemblyfrom inside the building), and it should tory tests designed to simulate key exte- provides the highest recognized level ofnotbeconfusedwithafire-resistance rior fire hazards. resistance to exterior fire exposure underrating (e.g., a one-hour rating), which is In simple terms, Class A testing eval- standardizedconditions.Whatitdoestypically intended to characterize perfor-uates whether a roof assembly can: not prove is how the roof will performmanceforinteriorfiresandcompart-resist ignition from exterior under all real-world fire scenarios, normentation.ClassAshouldtherefore does it address non-fire-related perfor-flame exposure; mance such as wind uplift, impact resis- be understood as a specific fire-perfor-limit flame spread across the rooftance,moisturecontrolorlong-termmance threshold, not a comprehensivesurface; and durability. Class A should therefore bemeasure of roof resilience.Consultants. Experts. Innovators.Roof Consulting ServicesOur architects, engineers, technical specialists, and construction experts specialize in the assessment, design, remediation, and quality observation of buildings and property assets.We can help you increase the lifespan of your property, improve energy efciency, comply with codes and regulations, and maintain a safe environment.Our expertise is related to: Adhesion and Fastener TestingPull Testing Asbestos TestingRoof Anchor Design and Testing Green Roofs and PhotovoltaicRoof Condition Assessment Hazardous Material TestingRoong Design and Specications Integrity and Thermal ScansSubstrate Structural Testing Plaza Decks and ParkadesThird Party Rooftop Quality Assurance Project Management and AdministrationWind Uplift Testing604.295.8070 rimkus.comwww.rcabc.orgl13'