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Christopher McGroarty

Christopher McGroarty is senior product manager of single-ply systems for GAF, Parsippany, N.J. He is responsible for marketing and developing single-ply products. He has been with GAF's product management group for more than seven years.

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Testing TPOs

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In "A study of longevity," February 2014 issue, page 44, TPO membranes' long-term performance was discussed, leading to the conclusion that the material generally is performing well. However, some manufacturers have had issues when membranes were installed in high-heat situations. In response, a study was undertaken using heat-aging tests to determine whether TPO membranes perform differently in high-heat situations. The testing yielded some interesting results.

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