I'll stick with fiberglass then :-) I've watched a few video on youtube where you can see the damage done by water...man its scary !! Rest assure that I'll be on top of the roof maintenance schedule.
If someone had water leaks , tell me it is obvious when you inspect a RV if leaks are present . even a small one ? is the water migrate easily on the panel board inside ? The more I look at it the more loosing money on depreciation on a new Class C make sense now......at the very least you are buying some sort of peace of mind