Flat roof porch – Water flows right off for sloping ceilings, but flat they must maintain a watertight seal to prevent leakage. When you have a crack or blister in shingles, water can get under and trigger all kinds of devastation. Treatment of a cracked or scaled area. Sweep the roof to get some dust or dirt from your workplace. The roofing cement you will use will not stick if the surface is dirty. Cut around any cracked or peeling areas with a razor knife and remove each bad section. Make it a uniform shape like a square or rectangle.
How to repair a flat roof porch. Use cutout play as a pattern and cut a replacement piece of single in the same size and shape. If you cut out more than a bad layer, you have to cut enough pieces to get the new section up to the same level as the area around it. Cut another piece of single about 2 inches larger all the way around. Slip a flap under the edges around the clip art. Applies roofing cement under the edges.
Then to repair a flat roof porch. Place a layer of roofing cement down in the area of the entire clipboard with filler. Press the new single in the hole. Throw down shingle with roofing nails. You should cement only the bottom the other layers can only be nailed. Lay over a larger patch only apply and nail it down. Move around the edges of the patch top with cement to form a seal. Treatment of a bubble or a split single. Treat a bubble by cutting a line into just that stored with a razor knife. PRY cut open and force roofing cement on both sides of the cut. This is also what to do with a single split. Cut down both sides of the cut or divide the roofing nails, and covers it with a patch.