b'CRCA Ridging and Wrinkling of Modified Bitumen Roof SystemsA CRCA research updateO ver the years, there have been numerous reports of ridging and wrinkling in modifiedof the cover boards and their attachment could influence the occurrence of ridges and wrinkles bitumen roof systems. As a result, in 2016, CRCA commissioned the National Researchin the modified bitumen roof membrane.Council Canada (NRCC) to carry out a research study to identify and quantify theA preliminary mitigation technique that can be implemented is theuse of a more rigid and contributing factors that cause membrane ridging and wrinkling and to determinedimensionally stable cover board. These types of cover boards, due to their rigidity, may aid in practices that will mitigate the formation of ridges and wrinkling. mitigating the stresses from the insulation to the roof membrane.In Phase 1 of the project, laboratory and field testing were conducted with different test sys- Upon the completion of Phase 2, further recommendations and mitigation techniques tems to evaluate how different components contributed to the ridging and wrinkling of the roofwill be established that can be implemented. CRCA will provide updates as the research proj-membrane. Two types of insulation (EPS and polyisocyanurate), asphaltic core board and modi- ectprogresses.fied bituminous membrane were tested. We encourage you to reach out if you have any questions or would like further information.Phase 2 commenced in 2022 and is evaluating different materials and system configurations toRegards,assess the influence of membrane stress, attachment patterns of insulation and coverboard, andWendy Fraser, P. Eng. the influence of moisture migration in the formation of ridges and wrinkling. Technical Manager Although the research project is ongoing, initial results have shown that the insulation un- fraser@roofingcanada.comderwent more significant dimensional changes relative to the dimensional changes of other com-ponents in the roofing assembly. These dimensional changes transfer stresses to the componentsTroy Ferreira, RRO, CET above it and cause those components to deform. In particular, the cover board and membraneTechnical Director layers deformed as a result of the stresses transferred from the insulation, indicating that rigidityferreira@roofingcanada.comBREATHE EASY, heres our product listAVAILABILITY AND FORMATS BITUMAR INC. CANADIAN ASPHALT INC.(MONTREAL) (HAMILTON, ON)PRODUCTS BULK BURPAK BULK Barrel (keg)(50 lb bags) (100 lb)LOW ODOUR oxidized asphaltwith an odour inhibitor (suppressant) withoutany added PPA in the oxidation process. T2, T3, T4 T2, T3, T4 T2, T3, T4 T2, T3, T4Benets: Less polluting. The kettles andtankers stay cleaner. Mops last longer.Asphalt ZEROpolymerized asphalt with a viscosityequivalent to LOW ODOUR oxidized asphalt T2 T2, T3 NA NAat a lesser temperature.Benets: savings on propane, less smoke,no odour and improved adhesion.SEBS LOW ODOUR Asphaltelastomeric asphalt with an odour inhibitor(suppressant) with a minimal elongation of 750%Benets: The ideal asphalt for the laying of NA SEBS 750 NA NAelastomeric membranes and fleece backmembranes as TPO, PVC and EPDM or for aphenomenal adhesion of surface gravel. It can replace urethane and glues at a lesser cost.NB: the bulk is available FOB factory (Montreal and Hamilton) or delivered in the greater Montreal or in the greater Toronto area.BITUMAR INC.|CANADIAN ASPHALT INC.11155 St-Catherine Street East, Montreal-East, QCH1B 0A4Tel. : 514 645-4561|bitumar.comORN THE ONLY SOURCE FOR PROFESSIONAL ICI ROOFING CONTRACTORS IN ONTARIO ONTARIO ROOFING NEWSISSUE 3 202313'