However, when I viewed the roof from the eaves, I could see obvious problems. I guessed that I would discover this as the clients had said the roofing company had been out more than one time to inspect the roof for leaks.
Visual inspection of the roof membrane did not reveal any obvious installation issues or places where the roof could be leaking.
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In the case of this house, the owners had a professional roofing company install a PVC membrane style roof roughly 4 years ago and I was asked to come out and inspect the roof as they were concerned that it was leaking, even after the roofing company had come out several times to inspect the roof. It derives its name, I am told, from its more historic use as the decking for railroad shipping cars. If you are unfamiliar with car decking, this is the tongue and groove wood that is usually 1.5-inches or even 2-inches thick. The inspection was of a 1960’s era house with a low slope roof, a car decking roof frame, and a PCV roofing membrane. While these new white membrane roofs are clearly the future of low-slope roofing, I had an inspection experience the other day that is worth discussing. Needless to say, this has huge benefits when it comes to cooling loads and comfort in a home, as well as the benefits of reflecting the damaging UV that degrades roofing materials so quickly. By contrast, I have climbed onto a PCV membrane roof on a nearly 100-degree F day and the roofing membrane was still nearly cool to the touch. In the summer heat, with some of the more traditional (older) modified bitumen black roofing membranes, you could burn your hand when getting onto the roof for inspection.
If you are a home inspector, you have experienced the amazing reflective properties of PVC and EPDM, white roofing membranes.
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