Rubber roofs have been used widely on RVs for a long time. My 98 5th while had rubber. All my units had rubber expect my 1970. My guess 80's and 90's they went to rubber. Some used fiberglass roofing as well.
Earl
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2017 Eagle 293RKDS, factory ordered, lots of mods and upgrades. More than I can list.
2018 Ram 3500 crew cab long bed SRW diesel 6spd Aisin 4wd Tradesman.
B&W Ram puck 5th wheel
Line-X premium
Mopar wheel to wheel steps
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