b'Installation MethodsInstallation Methodsof Modified BitumenRoof Systems By Troy FerreiraThisarticleoriginallyappearedare flexible in both heating andbranes can be smooth or granu-intheFall/Winter2020issueofcoolingconditions.Asecondlated, depending on the project RoofingCanadamagazineandtype of polymer is Styrene Bu- requirements.isreprintedwiththepermissionoftadieneStyrene(SBS).SBSisHistorically,modifiedbitu-theCanadianRoofingContractorsrubber-like which makes the bi- mensheetmembraneshave Association. tumen more flexible and also hasbeeninstalledbymoppedin M odified bitumen roof sys- a lower melting point than APP,hotasphaltortorchapplied; tems have been installedwhich makes SBS modified bitu- however,safety,healthanden-intheNorthAmericanmen a more appropriate choicevironmental concerns associated marketformorethanfourde- forourCanadianclimate.SBSwith the use of hot asphalt and cades. Modified bitumen is mademodifiedbitumenmembranestorch-appliedmethodshaveled from asphalt and is used in vari- can be installed using an open- to more frequent use of alterna-ous roofing applications. As theflametorch,mopped-onwithtiveapplicationmethods.Asa nameimplies,modifiedrefershotasphalt,cold-processedap- result,contractorsincreasingly to the addition of a polymer toplied or self-adhered application.are using cold adhesives to install the bitumen to achieve a flexibleModifiedbitumenmem- modified bitumen membranes or membrane.branesalsofeatureacorematusing self-adhered modified bitu- Torch-applied modified bitumen membrane with a white reflective granulated One of the polymers used isreinforcementmadeofpolyes- men membranes. However, therecap sheet membrane.AtacticPolypropylene(APP),ter, fiberglass or other materialsare advantages and disadvantages which is a form of plastic. APPto add stability to the membraneof each installation method that torch-downroofingmembranessheets. The surface of these mem- should be considered.Serving Southwestern Ontario Since 1972 Commercial Industrial Maintenance SpecialistsFree Estimates / Inspection152 Thames Rd. W., Exeter, Ont. N0M 1S3 Tel: (519) 235-2802Fax: (519) 235-1532Email: speat@hay.netCommercial and Residential RoofingTrinity Roofing Ltd. specializes in a variety of roofing applications andwaterproofing for residential, commercial and institutional buildings.Phone: 416-630-9213URL: www.trinitycanada.com Fax: 416-630-1722 Email: info@trinitycanada.com Torch-applied modified bitumen membrane with a typical grey granulated cap sheet membrane.ORN THE ONLY SOURCE FOR PROFESSIONAL ICI ROOFING CONTRACTORS IN ONTARIO ONTARIO ROOFING NEWSISSUE 1 202117'