b'RAPPORT TECHNIQUECurrently, North American manufacturers produce variousLes fabricants nord-amricains produisent divers types de types of cover boards, which can be categorized depending onpanneaux de garnissage, qui peuvent tre classs comme the material composition as: suit selon la composition du matriau :Asphaltic-based boards;Les panneaux dasphalte ; Insulation-based boards;Les panneaux disolant ; Cement-based boards;Les panneaux de ciment ; Gypsum-based boards;Les panneaux de gypse ; Fiber-based boards; andLes panneaux de fibre ;Recycle-based boards.Les panneaux de matires recycles. Due to differences in material properties, the cover board cause des diffrences de proprits des matriaux, le performance varies when incorporated into a roof assembly.rendement varie lorquils sont incorpors aux couvertures. SomeoftheboardtypesalreadyhaveindividualstandardCertains des types de panneaux ont dj des spcifications specifications,whileothersdonot.Theexistingstandardsnormalises individuelles, dautres nen ont pas. Les normes differ from one another in the properties specified as well assont diffrentes les unes des autres quant aux proprits in the minimum performance requirements. This leads to theet exigences de performance minimales. Cela nous amne fundamental question of what properties a cover board must la question fondamentale de savoir quelles proprits un have, regardless of its type, to fulfil its intended function in thepanneau de garnissage doit avoir, quel que soit son type.roof assembly. LeConseilnationalderecherchesduCanada(CNRC) TheNationalResearchCouncilofCanada(NRCC) assembledaconsortiumgrouptoworkwiththeNorthaconstituunconsortiumpourtravailleraveclindustrie American roofing industry to develop the requirements fornord-amricaine de la toiture en vue dlaborer les exigences cover boards. Sixteen North American participants, listed inpourlespanneauxdegarnissage.Seizeparticipants theacknowledgements,joinedNRCCsconsortiumgroup,nord-amricains, numrs ci-dessous, se sont jointsce including manufacturers, industry associations and contractorconsortiumduCNRC.Lobjectifduprojetest dlaborer associations.Theobjectiveoftheprojectistodevelopaune norme harmonise stipulant les critres de performance harmonized standard specifying the performance criteria forpour lutilisation de panneaux de garnissage dans les toitures the use of cover boards in commercial roofing. The R&Dcommerciales. LesrsultatsdeRetDduprogramme outcomes of the experimental program under execution willexprimentalencoursservirontllaborationdune be used for the development of the consensus-based standard. norme consensuelle.PRINTEMPS/T 2019 COUVERTURES CANADA 25'