Recently I purchased a commercial building of 60 square and its roofing is poor. I can see holes through which the daylight enters inside. The ceiling has gypsum panels where the leaks come from. To resolve this, I am looking for a roofing contractor who gets back the roofs in a condition. I don’t know much about these stuffs and did not come across any good contractors. I am residing in Ontario. Any recommendations who has worked good for you would be helpful.