b'TECHNICAL REPORTCover boards Consortium advances cover boardrequirements in commercial roofingBy/par Bas Baskaran and Dominique LefebvrePanneaux de garnissage Le Consortium fait avancer les besoins en panneaux de garnissage dans les toitures commercialesC over boards are commonly used in commercial roofingL es panneaux de garnissage sont couramment utiliss toaddstrengthandprotectiontoaroofassembly.pour les couvertures commerciales, afin den accrotre They are a rigid board in a compact roof assembly thatlasoliditetlaprotection.Cespanneauxrigides enhances resiliency and durability. Cover boards are installedamliorent la rsilience et la durabilit des toitures compactes. below the membrane and above the insulation to minimize theOn les pose entre la membrane et lisolant afin de rduire au deterioration of other materials during the service life of theminimum la dtrioration des autres matriaux. roof.Les panneaux de garnissage sont devenus de plus en plus Coverboardshavebecomeincreasinglyimportantasaimportantsla suite des initiatives dadaptation aux change-result of climate adaptation initiatives to ensure that roofs arements climatiques. Ils sont galement utiliss comme plates-increasing their durability in response to the changing weatherformes pour les ajouts, comme les toits photovoltaques et events. They are also commonly used as platforms for rooftopverts, qui augmentent la circulation des pitons et imposent add-ons, such as photovoltaics and green roofs, which result indes contraintes additionnelles. increased foot traffic and additional stresses on the roof system.Il est important de noter que ces panneaux ont un rle Important to note is that cover boards have a major rolemajeurdanslaprotectioncontrelesdommageset,par in protecting the roof assembly from damage and, as a result,consquent, doivent possder certaines proprits critiques. must possess critical properties to fulfil their function. RoofLinterfacedespanneauxdegarnissageesteneffetle failures due to high wind events can be attributed to the covermaillon le plus faible (Figure 1) en ce qui concerne larra-board interface as the weakest link (Figure 1). The observedchement par le vent. Les dfaillances ont donc menune field failures have led to the in-depth investigation of the coverenqute approfondie sur les proprits et le rendement de board properties and performance. ces panneaux.Peeled Cover BoardPanneau de garnissage dcollPeeled MembraneMembrane dcolleFigure 1: Failure of roof assemblies due to a lack of peel resistance between interfacesFigure 1 : Dfaillance dune couverture par absence de rsistance au dcollement entre les interfaces24 ROOFING CANADA SPRING/SUMMER 2019'