Roof Masco Chemical The roof in the form of a flat roof enjoys enormous popularity because there are no limits to building forms. Straight modern architecture sets standards in the design of buildings. This is expressed particularly strong in flat roofs. The option to use a flat roof are wide-ranging. For concrete surfaces such as a parking level you have a variety of design options. Between protected concrete and waterproofing sheet are drain and overlays to be installed so that water is derived safely and common shrinkage and creep processes are collected within the concrete layer. Since flat roofs require a waterproof roof sealing, the other layers as insulation, vapor barrier, etc. must be perfectly coordinated.