I work in the commercial modular building industry, and we use EPDM rubber membrane roofing on a large number of buildings. It comes 45 mil. and 60 mil thicknesses, in both white and black. properly installed on a commercial building it can come with a 20 year warranty. I replaced the factory roof on my aging motor home with the 45 mil. white about 6 years ago, and have had no leaks or damage even with small branches falling on the roof during the winter. When i finally get around to building my T/C I will use the 60 mil for some extra thickness as i won't have to worry about the extra weight. I do carry a scrap piece of roofing about 2 feet square and some eternabond roofing tape in case of any roof damage on a trip. The eternabond patch can be applied on a cold wet roof if needed.
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