b'OPTION VAPOUR RETARDER/ROOFING SYSTEM CONSTRUCTION CRITICAL CONSIDERATIONSDROOF MEMBRANE COVER BOARDADHESIVE ADHESIVETHERMAL INSULATIONAdhered vapour retarder (e.g., heat-welded SBS membrane or ADHESIVE a two-ply hot-mopped vapour retarder) The long-term durability of the fasteners into a wet deck Insulation attached through the vapour retarder into the concrete deck using stainless-steel fasteners or spikesThis configuration adds attachment confidence for the roofing system while fastening through the vapour retarderTHERMAL INSULATIONOver the first layer of insulation, adhere additional insulation STAINLESS STEEL FASTENERS OR SPIKES (if/as required), and then the roofing membraneADHERED VAPOR RETARDER (HEAT-WELDED SBSMEMBRANE OR 2-PLY HOT-MOPPED VAPOR RETARDER)CONCRETE DECKOPTION DEROOF MEMBRANE COVER BOARDAdhered vapour retarder (e.g., heat-welded SBS membrane or ADHESIVE ADHESIVETHERMAL INSULATION a two-ply hot-mopped vapour retarder)ADHESIVESupplemental attachment through the vapour retarder in theThe long-term durability of the fasteners into a wet deckperimeters and corners using stainless-steel fasteners or spikes This configuration adds attachment confidence for the roofingInsulation and roofing membrane adhered over the vapoursystem while fastening through the vapour retarder in a limited THERMAL INSULATION (WITH SUPPLEMENTAL areaATTACHMENT IN PERIMETER AND CORNERS USING retarderSTAINLESS STEEL FASTENERS OR SPIKES)ADHESIVEADHERED VAPOR RETARDER (HEAT-WELDED SBSOR 2-PLY HOT-MOPPED VAPOR RETARDER)CONCRETE DECKOPTION EF OVERBURDEN (BALLAST OR PAVERS)FILTER FABRICTHERMAL INSULATION Attachment is provided/supplemented by the overburden Use of a protected roof membrane assembly With the membrane at the deck level, it serves as the vapour retarderROOF MEMBRANE SERVING AS VAPOR RETARDERCONCRETE DECKOPTION FTable 3: (Continued from page 10.) Vapour retarder/roofing system constructions and critical considerations.Think Safe,Work Safe,since 1988Top-Line Roofing & Sheet-Metal Inc specializes in the installation, repair, and maintenance of industrial roofs throughout Southern Ontario. OUR SERVICES:Commercial roofing Re-roofingRoof maintenance Skylight installationRoof inspection,Sheet metal flashing evaluation & report fabrication & installationHistorical restoration Retro-fit curb installationEmergency roof repairs(905) 602-07601325 Fewster DrMississauga, ONL4W 1A2toplineroofing.caORN THE ONLY SOURCE FOR PROFESSIONAL ICI ROOFING CONTRACTORS IN ONTARIO ONTARIO ROOFING NEWSISSUE 2 202011'