Thermoplastic polyolefin, also known as TPO, is utilized in many low slope commercial roofing systems and includes heat seams along with roof sheets. TPO is mostly made of a combination of polypropylene and ethylene-propylene. Another type is Polyvinyl chloride (PVC) which is a two-layer system that is UV resistant and is somewhat easy to install. It is extremely durable, strong, and even fire-resistant.Metal roofs (which are made from metal) provide outstanding durability and also look great. Metal roofs are a popular choice due to their durability and appearance. Other materials used for roofs can include fiberglass and asphalt shingles, concrete tiles, slate, and more.Bob Harvey Roofing offers a wide range of both residential and commercial roofing services in Layton, UT. With over 30 y