When it comes to commercial roofing products, TPO (thermoplastic polyolefin) single-ply membranes are a popular choice among property owners and roofers in North Andover, MA, and throughout the country. But with the increasing popularity of TPO come several exaggerated claims and misconceptions about the product. Because of this, GAF has commissioned the Structural Research Inc. (SRI) to do a comparative study of the major TPO brands in the market – GAF, Firestone, Carlisle and Johns Manville.
How the Study was Conducted
SRI obtained various rolls of all the major TPO brands from 2013 to 2014. The top brands included in the study are: GAF EverGuard Extreme TPO (50 and 60 mil), GAF EverGuard TPO (60 mil), Johns Manville TPO (60 mil), Firestone UltraPly TPO (60 mil), and Carlisle Sure-Weld TPO with OctaGuard XT (60 mil).
The SRI did various ASTM physical property testing, including thickness above scrim and weld strength, on all these TPOs. The tests showed no significant difference among the products. However, when they were tested for accelerated aging through ASTM heat aging, weathering and weight loss strength, significant differences were found.
Four Key Findings
1. All the tested TPOs exceeded the ASTM-6878 standards. Meaning, in terms of thickness, thickness over scrim, and weld strength, no brand is better than the others.
2. In the accelerated aging tests indicating how long the membrane would last, there were significant differences. The brand that topped the other TPOs is GAF, followed by Firestone, Carlisle, and Johns Manville.
3. In the amount of weight lost during accelerated aging tests, there were even more significant differences. It is important to test for weight loss, because this can lead to erosion and membrane failure. The ranking results of the four major brands are the same.
4. When the brands were tested for product consistency, three of the brands were found to be more consistent with the products they produce: GAF, Firestone, and Johns Manville.
The study has shown that among the four major TPO brands, GAF is the best choice for your commercial building. Their EverGuard Extreme TPO (60 mil) can last for up to 30 years, while their EverGuard TPO (60 mil) can last for 25 years.
If you are in need of the services of experts in roofing in Haverhill, MA, there is one company you can surely rely on – Edmunds General Contracting, LLC. We are a certified GAF Master Elite Contractor that has been offering top-notch roofing services for nearly a decade. You can call us at 877-618-5955.