TPO membranes have experienced significant market growth since
their introduction in 1993 and are widely accepted in the roofing
industry. However, several organizations, including several TPO
membrane manufacturers, have raised concerns regarding TPO membrane
performance. If you are involved with specifying or installing TPO
membranes, I encourage you to be aware of the issues raised.
During the 2009 International Roofing Expo,® GAF Materials
Corp., Wayne, N.J., conducted an educational session during which
company representatives identified, based on their research, key
performance indicators for TPO membranes. The research illustrated
notable differences among manufacturers' product formulations and
the effects these differences can have on field lap seaming and
In August 2009, Carlisle SynTec Inc., Carlisle, Pa., announced
it had made a formulation change to its TPO membranes several years
before to provide enhanced ultraviolet and heat-aging stabilizers
intended to improve long-term...
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