Choosing a membrane is one of the biggest decisions in any flat roof installation in Edmonton. This guide compares SBS torch-on, TPO and EPDM side by side. It looks at typical lifespan, hail resistance, cold-weather performance and the building types each system suits best. Learn why 2-ply SBS is the top choice for most Edmonton commercial buildings, when TPO makes sense for large warehouses, and where EPDM works well. Find the best system for your building, budget and long-term plans.