(TPO) Short for thermoplastic polyolefin, is one of the highest demanded and most trusted single ply roofing systems on the market today. It is a perfect roofing solution for flat and low sloped roofs. Tpo is one of the most durable flat roofing systems available and can be installed over a variety of existing roofing systems. It is energy star rated and is one of the most energy efficient roofing systems that can be installed, saving you money on your energy bill at your home or business. This new generation membrane has many more great benefits.