b'EXTREME WEATHERA WEATHER SHOCKS PROTOCOL to Investigate Building Envelope Components for Changing ClimatesBY FLONJA SHYTI, MASC.; ABHISHEK GAUR, PH.D.; BAS BASKARAN, PH.D., P.ENG.This article is a reproduction of the NRCs original publication in Pushing the Envelope Canada, a publication of the Ontario Building Envelope Council, Spring 2023.E xtremeweathereventsaremined using Appendix C [1]. The dataonThesefutureclimaticloadsfor becoming more frequent, intenseenlistedwithinisbasedonhistoricalmain weather parameters such as wind, and longer due to climate change.observationsthatdonotaccountforrainandtemperaturecanbefound Theseextremeeventsleadtofuture climatic conditions for CanadianClimate-RCI for a range of global weathershocks,whichcanadverselycities or for the effect of weather shockswarmingmagnitudesfrom0.5Cto affecttheexpectedperformanceofoncomponentsandsystems.The3.5C. Climate-RCI is a web-based tool exposed building envelope componentsNationalResearchCouncilofCanadaand can be accessed via NRCs wind roof and systems.(NRC) developed a protocol outlined incalculator[4].NRCisnowaddressing In Canada, design loads for buildingthe CSA A123.26, Performance requirementstheeffectsofweathershocksaspart forclimateresilienceof lowslopemembraneoftherecentClimateResilientBuilt envelopes are calculated in accordanceroofing systems [2], to account for futureEnvironment Initiative. Weather shocks withtheNationalBuildingCodeofextreme climatic loads in the design andareseveraloccurrencesofrapidand Canada,utilizingclimaticloadsdeter- construction of roofs [3].significant temperature variations, such 16 lROOFINGBClSUMMER 2023'