Patch the nail or screw holes by slipping a piece of roof flashing beneath the shingle. Increase a bead of caulk or roof cement to the highest and bottom fringe of the flashing to maintain it in place. Carefully Slice a rectangle-shaped area that contains the entire damaged roofing materials. https://roofing-contractors93937.blog2news.com/34344656/top-roofing-supplies-secrets