cleve in markham 1 review Markham, ON Joined 2010/03/19 First Review 8/10 roof Roofing review in Markham Over 8 years ago I had a leak in the sun roof. I talk to George at rona lansing hardware dept. He showed me Roof Patch and explain how to wait until the weather was right. Then carefully use a ladder and apply the roof patch. Job Price Was this review helpful?