We said no on covers for a couple of reasons. First, I am cripple and getting onto the roof is not possible. Second, DW won't go on the roof. I don't blame her. Yes, I could get a neighbor kid to do it. Even my friends that have no problems tell me they regret buying a cover because it is too hard to put on, and take off. We have had TT's and fivers since 1988 and never used a cover. We live in Northern AZ where the sun is dramatic. The worst that has happened is that we had to have a roof vent recalked once in five RV's. So, we take a pass on covers.