b'EXIGENCES DE RSILIENCE AUX CHANGEMENTS CLIMATIQUESAnationalsurveyofover1,000Leremplacement,danslaplupart homeowners confirmed that the majoritydescas,sestproduitaprs15ans, of the ASRs were replaced and repairedmmesilesbardeauxtaientcots much sooner than their expected service 30, 40 ou 50 ans. Prs de 80 % du life. Replacement mostly occurred aftermarch est attribulindustrie de la 15 years of the installation irrespective ofrfectiondestoits,etlesnouvelles the products being labelled as 30/40/50- constructionsreprsententlereste year shingle. Nearly 80 per cent of the(NRCA, 2009). Quant aux matriaux de marketisallocatedtothere-roofingremplacement, les bardeaux dasphalte industry, and new construction accountscontinuentdereprsenter70%des fortheremainingbusiness(NRCA,toitures rsidentielles.2009).Asforthereroofingmaterials,LeCNRCainterroglespropri-asphaltshinglescontinuetodominatetaires canadiens (Chavez et coll., 2019). the residential roofing market with moreLes donnes ont indiqu huit types de than 70-per-cent share. dtrioration,savoir le retroussement, NRCsurveyedCanadianla perte de granules, le rtrcissement, homeownerscoasttocoast(Chavezlarrachementparlevent,linfiltration et al., 2019). The data indicated eightdeau, la formation de glace et la moisis-typesofdeterioration,namelycurling,suresurlerevtementintermdiaire. clawing, granule loss, shrinkage, blownPlus du tiers des rpondants ont rpar off,waterinfiltration,icedammingetremplacleurtoiturecausedu andmoldonthesheathing.Overretroussement, suivi par les problmes one-thirdoftheCanadianssurveyedpossparlaccumulationdeglace,la repaired and replaced their roofs due toperte de granules et larrachement par curling, followed by issues related to icele vent.damming, granule loss and blow off. Il manque un lien dans les spcifi-There is a missing link in the currentcations actuelles du Code national du NationalBuildingCodeofCanadabtiment du Canada (CNBC). Bien que (NBCC)specifications.Althoughthela norme CSA A123.5-2016,Bardeaux CSAA123.5-2016,Asphaltshinglesdasphaltefaitsdefeutredeverreet madefromglassfeltandsurfacedwithsurfacs avec des granuls minrauxmineralgranules,isreferencedinthesoitrfrencedansleCNBC,les NBCC, the alarming data above (baseddonnes alarmantes ci-dessus (fondes on survey) led to a detailed code analysis,sur un sondage) ont menune analyse andthefindingsweredocumentedbydtailledontlesrsultatsontt Chavezetal(2019).AsummaryofconsignsparChavezetcoll.(2019). the missing links in the existing codeCes liensmanquants snumrent specifications is as follows:comme suit : No correlation between the CSAPas de corrlation entre la norme123.5 specifications with the PartCSA 123.5 et les exigences de la 4 wind design load requirementspartie 4 concernant la charge de to account for Canadian climaticcalcul du vent ; variations;Pas dexigences associes au No specific climate dependenceclimat local pour les CBA, seulesrequirements for ASR, only genericdes exigences gnriquesrequirements are specified for thesont stipules ;effect of component deteriorationPas de dispositions pour ladaptationdue to weather parameters; aux changements climatiques ; No provisions for climate adaptation Pas de devis pour les exigences of the ASR; and dinstallation appropries des CBA.Par consquent, il est urgent dhar-No specifications for the proper installation requirements of ASR. moniser pour accrotre la rsilience et la Hence,thereisurgencyinthedurabilit des CBA. Le dveloppement harmonizationeffectduetocodedecetteapprocheglobaleprofitera specificationtoincreasetheresiliencyauxconcepteursetauxindustries. anddurabilityperformanceofASRIlgarantiralecycledevieprvutout inCanada.Developingthisholisticentenantcomptedesconditions approach will benefit the designers andclimatiques futures. PRINTEMPS/T 2021 COUVERTURES CANADA 41'