Benefits of Flat Roofs Materials Used for Flat Roof Installation 4. Modified Bitumen: A layered roofing system reinforced with fabrics for extra durability. How Flat Roofs Are Installed Next, a waterproof membrane or material is carefully applied to create a seamless finish. 2. Resealing: Applying a new waterproof layer https://flat-roof-installation-and-repair.trustedstandard.com