Welcome! The Great Canadian Roof Doctor Inc. is a full service roofing contractor, specializing in Roof Inspections, Repairs, Re-Roofing & Coatings. We service the Lower Mainland, Vancouver Island and the Thompson Okanagan. Roof shingles across Canada need replacement after 15 to 20 years on average, despite manufacturers frivolous 30 & 50 year warranties. Landfills are filled with millions of tons of roof waste every year. Until now, no one in Canada has addressed this problem.