I am in the market for a 40 foot class A diesel pusher. I have read that taking care of the roof is something you have to do every other year or so. Winnebago has the fiberglass roof material, so do...
At the very least, the seams between the end caps and roof need to be maintained. Any roof penetration will have degraded caulk over time. An indication of proper maintenance is fresh looking sealant around the openings.