Membrane roofing is a type of roofing system for buildings. It is used on flat or nearly flat roofs to prevent leaks and move water off the roof. Membrane roofs are most commonly made from synthetic rubber, thermoplastic (PVC or similar material), or modified bitumen ("torch down"). These types of materials have become the replacement for asphalt roof systems, an older, less effective type of flat roofing system. Membrane roofs are most commonly used in commercial application, though they are becoming increasingly more common in residential application.
1) RC roof primed

2) Exposed membrane work

3) Exposed membrane work completed