The strength, ease of installation, and longevity of TPO is what makes it so popular. It can be heat-welded during installation because of its thermoplasticity, which is a huge advantage since seams are usually the weakest part of a roof. In fact, TPO seams are 3-4 times stronger than EPDM systems and 6 times stronger than glue or tape based systems! They are resistant to chemicals, do well in hot and cold weather, and are generally quite affordable. TPO systems can last 10-20 years with the right installation and maintenance. Lastly, if it is important that your roof is environmentally-friendly, TPO is a great choice.
TPO roofing systems contain no plastisizers, they don’t degrade under UV radiation, and they come in light colors (which reflects heat, helping the building stay cool). They can also be made from some recycled materials! TPO is the perfect choice for your “green” building.
Like all roofing systems, however, TPO does have some downfalls. Most of its shortcomings center around the fact that it is still such a new system. It doesn’t have the time-tested, reliable reputation that other roofing systems can flaunt. Also, remember that the strength of any roof (TPO especially) depends on the quality of installation. If you choose a reliable roofing contractor and take care of your roof with maintenance checks every year, you shouldn’t have any problems with a TPO roofing system.