TPO: Thermoplastic Olefin or Polyolefin
TPO membranes are single-ply roof membranes constructed from ethylene propylene rubber. They are designed to combine the durability of EPDM rubber with the proven performance of hot-air weldable seams. They have been tested as having excellent resistance to ozone, are algae-resistant, environmentally friendly and safe to install. The material's manufacturers are so confident in properly welded seams that the material is sometimes advertised as a monolithic (seamless) roof. Seam strengths are reportedly 3 to 4 times those of EPDM's adhesive and tape seams
One of the main advantages of TPO roofing is it's heat reflective and energy efficient properties. This is mainly due to its stark white color, however many manufactures have realized the need to implement new colors and are offering tan and gray reflective color options. TPO can be installed to basically any scale with some of the worlds largest building utilizing TPO roofing systems - it comes in strips typically 8ft, 10ft and 12ft wide that are heat welded on site. Another advantage to TPO roofing is its price. TPO is often one of the most economical options for a large low slope roofing area. Another distinct advantage to TPO membranes is the simplicity of repairs - You simply cut out the effected region and weld a new piece in its place.