Photo Source: GAF

Why TPO may be a better choice than EPDM

When it comes to comparing TPO and EPDM roofing systems, GAF suggests that TPO beats EPDM hands down. Over the past 15 years, TPO has grown from 3.5 million squares to over 8 million squares. It is projected to continue to grow to close to 10 million squares by 2022 making it the fastest growing single-ply roofing membrane due to it’s flexibility according to GAF. The reasons why can be broken down into three different categories: reliability, installation,  and energy efficiency.



The EverGuard TPO seams, according to GAF, are 4 times stronger than those of the taped EPDM seams making it a longer lasting roofing system. The TPO seams are able to handle over 50 lbs of pressure whereas the EPDM can only handle between 10-20 lbs. Additionally, TPO can handle up to 250 lbs of pressure in order to resist puncture holes when traditional EPDM cna only handle about 100 lbs. Finally, TPO is a more stable option in regards to shrinkage. According to GAF, EPDM can shrink up to 2% after it is installed.  Comparatively, TPO has a shrinkage rate of 0.5%.

Ease of Install and Choice

Because EPDM installations have a 12 step process, there is more room for error. Luckily, TPO is installed in 3 steps: rolling out and fastening the membrane and welding the seam. TPO roofing systems come in three styles: smooth, fleece-back, and self adhered giving the customer full control over their building design.

Energy Efficiency

Because a black roof can reach 170 degrees Fahrenheit or more on a sunny day, TPO system white roofs save you money by transmitting less solar radiation at temperatures as low as 110 degrees Fahrenheit. The reflective material TPO systems are made out of help to reduce demand charge on commercial buildings accounting for 30-70% of the total energy bill.