b'RESILIENCYa future we cannot see. We must try toWind trends are not as clear as theTheNationalResearchCouncil imaginebothafutureofweatherwemodellingforprecipitation,butsomeofCanadahasdevelopedaResilience must not merely endure but also recoverforecasting suggests strong wind eventsCapacity Index web tool for use in roof from.Howdowedothat,andwhatalongthecoastlineswillincrease,butdesign.Byincorporatingalgorithms should we expect? diminish in intensity further inland. Ofthatutilizeuser-selectedfuturemean Climateisthewordweusetocourse, this is not a rule, but rather atemperatures, the tool provides projected describeaverage,seeminglychangelessworking hypothesis; because climate isconditions for three principal types of conditions expected over the course ofnot changing at a static rate, modellingweather:heat,windandprecipitation. a yearwhen it will be hot or cold, wetisconstantlyself-correcting.WhatweThe tool was developed in conjunction or dry, windy or calm. Weather is whatmight hypothesize today could be quitewith the CSA Standard for climate resil-happens in the momentthe result ofdifferent tomorrow. ienceofmembranewaterproofroofs climate.WhenanyonespeaksaboutModellingformeantempera- (CSA A123.26). The Standard is volun-climatechange,thephrasegenerallytureincreasessuggeststhatseasonaltary and may eventually be a reference means achangeinthe average condi- temperatures will increase for all regions,tool in the National Building Code. As tions we have come to expect and whenthe highest winter increases affecting thea member of the CSA committee that they will occur. And, since temperaturenorth and the highest summer increasesdeveloped the Standard, I will say more isaprincipalinfluencerofweatheraffectingthesouth.Additionally,about it in Part 2 of this series on resil-(seasonal heat or cold, precipitation and,extreme heat will likely last longer andient roof design and construction.to some extent, wind), climate change iscontinuetosetnewrecords. 10 B.C.sSo much more could be said about usually described in terms of changing mean temperatures. 7 severe heat wave of June 2021 has beenmodelledclimatechange,butthe called the sixth-hottest event since thepointisthis:enoughworkhasbeen Average temperatures across Canada1960s.Morethan600deathsacrossdonetoshowusthatthefuturewill have increased 1.3 C over the past 50theprovincewereattributedtothe require measures in building design and years. 8This leaves Canada more vulner- heat dome. 11 construction that we are not necessarily able to climate change than perhaps anyWhatdoesthismeaninpracticalemployingrightnow.Tosomeextent, othercountryontheplanet.Withinterms?Nooneisreallysure,becausewe are still designing and building roofs Canada,projectionsindicatethatofcourse,theseareprojections,notfor the climate of yesterday. This needswarming trends will be stronger in thepredictions.Forexample,ariseinto change.northandwest,andsloweralongthemeantemperatureswilllikelyresultin Atlanticcoast.Becausewarmaircana general increase in precipitation, butDESIGNS ON TOMORROWholdmoremoisture,warmingtrendsHow do we change the way we design willprobablybeaccompaniedbyexact amounts are impossible to model. moreprecipitation.ClimatemodellingExtremeprecipitationeventsmayandconstructroofs?InPart2,well commissionedbyMetroVancouveroccur, and we have already experiencedexplore ways that a roof can be designed (2017)indicatesthatasthemeansome,buttheywillalmostcertainlyand built to meet the challenges of the temperature increases (projected to risebecome more frequent. Wind events willfuture, beginning with the CSA Standard as much as 3 C by 2050), precipitationchange, and on a global scale, modellingforclimate-resilientmembraneroofs. will likewise increase, both in frequencysuggests that tropical cyclone frequencyFliptopage24tocontinuereading and intensity. 9Certainly, the south coastwilleitherremainconstantorevenabout this topic.of B.C. is already seeing signs that thediminish, but the intensity of storms will Weveauthoredthebookongreat future is here. likely rise. roofingdesignandconstructionstan-Roof Consulting, Design & InspectionRoof Forensic, Surveys & AuditsRoof Specification & TenderingRESIDENTIALCOMMERCIALINDUSTRIALPlumbing and HeatingStructural SteelFlat and Steep RoofingCladding Steel Fabrication and InstallationHVACMechanical ContractingEngineering Serving BC & Western TerritoriesIndustrial ConstructionIndustrial Maintenancesince 1991 245 - 3rd Street, Kitimat, BC V8C 2N8 Mons AasePh: 250-632-6859|Fax: 250-632-2101RCABC - Accepted Observation Firm President, RRO, TQ, IPEmail: 101first@cimsltd.comIIBEC - Member(250)6143369 www.101industries.com aaseroof@outlook.comToll Free: 1-877-632-685918 lROOFINGBClSPRING 2023'