b'Cold Storage Facilitiesneeds to be mindful of these gaps. When gaps occur, they should be filledwiththesamesprayfoam used in the metal roof deck flutes, penetrationsandperimeterwalls. A rule of thumb for this applica-tion is any gap larger than 1/8 of an inch should be filled. The thicker theinsulationboards,themore critical it is to implement this qual-ity control technique.MembraneAttachment MethodsTheroofingindustryhasa mind-boggling amount of roof sys-tems available. Only a small num-berofaboutonemillionunique roof systems listed in FM Approv-als RoofNav may be suitable on cold-storage facilities.Generally,twocategoriesof roof systems are most commonly usedoncold-storagefacilities. Withconcreteroofdecks,anad-hered system is the most common choice. Asphalt as an adhesive or low-rise foam adhesive also are rou-tinely used with success.Photo 3: A view of a roof perimeter near completion. Note the spray foam at the roof edge between the insulated metal panel wall and the insulation and cover board, sealing against air movement. Additionally, a strip of butyl with its release paper still in place is installed and ready at the outside edge of the galvanized insulated metal panel wall cap.EVERYTHING YOU NEED FOR YOUR ROOFING & BUILDING ENVELOPE PROJECTS.Dynastywith ArmourZone Performance Shingles Ener-AirPolyiso InsulationASK US ABOUT OUR DELIVERIES!WWW.ROOFMART.CA12ONTARIO ROOFING NEWSISSUE 4 2019/2020 THE ONLY SOURCE FOR PROFESSIONAL ICI ROOFING CONTRACTORS IN ONTARIO ORN'