b'BUILDING CODEThe CSA-A123.51 Standard providesCSA-A123.23,ProductspecificationwithCAN/-37.51-M,butthatstan-more guidance for asphalt shingle instal- forpolymer-modifiedbitumansheet,dard was published in 1990, was never lationthantheremainderofPart9,pre-fabricatedandreinforced.PVCupdatedsinceitsoriginalpublication and it is the foundation for the RCABCsheetmembraneinstallationisbrieflyand has subsequently been withdrawn StandardforAsphaltShingleRoofcoveredinSection9.26.,butArticle(ref.StandardsCouncilofCanada Systems.Toavoidpiecingtogether9.26.16.1.isoutofdate,referringwebsiteforupdatedinformationon the various requirements of Part 9, weinstallers to the now-withdrawn CGSBCGSB standards).recommend using the CSA standard or,37-GP-55M,ApplicationofSheetFinally,Section9.26.includes better yet, building your asphalt shingleAppliedFlexiblePolyvinylChloridepermissible methods that are no longer roofusingtheRCABCsGuaranteeRoofingMembrane.Finally,Sectionsupportedbymanufacturersoreven Program Standard.9.26. says hot fluid-applied rubberizedcurrent standards. I already mentioned Room for improvement asphalt shall be installed in accordancetheissueofcementingtheedgesof While Part 9 has the most to say about roofing in the building code, it has its problems.Indeed,requirementsfor roofing in the building code as a whole desperately need an update. New CSA standardshavealreadyreplacedolder CSGBorCSAreferencedocuments, and the CSA Technical Committee for Roofing (A123) is now poised to take on the development of new standards, including standards for non-bituminous roofing materials and systems. However, untilthathappens,usetheRCABC GuaranteeStandardsandconsultthe manufacturerofthemembraneunder consideration.To illustrate the need for a wholesale update,considersomeofthenotable absences and misplaced materials from thelistofprimaryroofingmaterials coveredinTable9.26.2.1.-B,Roofing Materials. For example, ample space is given for built-up roof systems, but it includespolymermodifiedbituminous membranes, which should be given their owndesignatedspace,consistentwith thecurrentCSAStandardA123.23. EPDM and TPO are mentioned only in Table9.26.2.1.-B,RoofingMaterials,PIONEER IN butnothingaboutstandardsfortheir installationisincorporatedintotheITS FIELDsection. Selvage roofing (also referred toasrollroofing)alsohasitsown subsection, although this material is nowHighly Specialized in Tapered EngineeringSimplied Installationlargely out of fashion. Factory Mitered Material Color Coded Drawings and PackagingTheproblemsextendbeyondTrained Field Techniciansabsencestoincludereferencedstan- Well Polished Design Teamdardsandpermissiblemethods.ForFor sales contact Ross Hainesexample,Table9.26.2.1.-BlistsCGSBrhaines@posislope.com37-GP-56Masthestandardforpoly- Serving Roong Contractors Across Canada Since 1982mer-modifiedbituminousmembranes,Surrey | Mississauga | Peterborough | Montreal butthatstandardwaswithdrawn604-599-6655 yearsagoandhasbeenreplacedby www.rcabc.org l23'