Benefits of Flat Roofs Materials Used for Flat Roof Installation 2. TPO (Thermoplastic Polyolefin): Known for energy efficiency and resistance to UV rays. How Flat Roofs Are Installed Finally, flashing and drainage systems are installed to protect against leaks and water pooling. Cracks or punctures in the roofing material https://flat-roof-installation-and-repair.trustedstandard.com