The Basics of Flat Roofs Advantages of Choosing a Flat Roof 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. https://flat-roof-installation-and-repair.trustedstandard.com