Roof membrane Maintenance
I don’t know who Keystone buys the membrane from, and my manuals are out inside the RV. I do not recall if I have anything more than a general statement that might be in the generic keystone book - “clean the roof couple of times per year” or something. There have been many threads on the subject here.
Major membrane manufacturers in the US are
Carlisle
Firestone
GAF
Johns Manville
The most common roof on commercial buildings is a 60 mil thick TPO membrane. 40 mil is cheaper but less common. I think our RVs have 40 mil membranes.
There are millions of square feet of TPO roofing on buildings in the USA today, and I am willing to bet that those roofs only get washed when it rains. We wash our RV roofs because the dirt and bird poop drips down over our beautiful fiberglass sidewalls and it looks ugly. I don’t know if a roof wash extends the life of the membrane. That being said - I wash mine couple times per year. I googled Carlisle’s recommended maintenance. Here are a couple of screen shots for your reading pleasure.
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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