GCG Roofing is a leading Calgary roofing company that offers outstanding service catering to your new or renovation roofing projects, specializing in asphalt shingles. We put our high quality standards, dedication and experience into every project we do. As homeowners ourselves, we understand the importance in the investment of a good roof. Did you know that replacing the asphalt shingles on your home can provide you with a return on investment of between 25%-75% (according to Appraisal Institute of Canada) when it comes time to sell your home? This is not just a necessary expense but an investment in your house, your largest asset. We provide customers with a careful and professional assessment in language that makes sense, taking into consideration your investment and the cost vs. benefit.