Flat roofs always seem to cause more problems then a sloped roof for the main reason that the water doesn't run off. For this reason the water ponds and eventually finds its way into your home. It can cause serous damage to your decking, structure, and interior of your home if your flat roof ponds or leaks. So, its real imperative to have your flat roof inspected once a year by a professional to make sure you don't have any problems in the future. In this case our Denton homeowner decided to replace his flat roof before it started to leak into the house, but as you can see once we tore off the old roof he had lots of decking a structural damage under the old roof. Once we replaced the decking and brought the structure back to code, we laid down a heavy rubber base membrane sheet. The base sheet provides protection and give the top sheet some thing to adhere to. This peel and stick application works and looks great cause it seal itself and the top sheet comes in a variety of colors to match your existing roof.