OK, well, reroof with the same flexible membrane which you roll and glue down.
I have tried various other things like FRP (Fiberglass Reinforced Panels), rolled on rubber roof paints and BEDLINER..
ALL of the above were epic fails.
The FRP worked for 5 yrs, then with the extreme temp changes it would buckle and then rip..
Rolled on rubber roof paints, lasted about 2 yrs then started wearing off to the point I could see the fibers in the FRP..
Bedliner, yeah fell for that also after scrubbing and grinding off the remainder of the rolled on rubber roof paints I rolled out a nice thick coat of bedliner.. Then topped it with a nice bright white paint.. Yep, it failed any place the fiberglass panels had cracked or ripped..
I tossed the white flag of surrender and started calling local RV shops to see if they would order a roll of RV roofing membrane.. None would order...
However, one did give me a good idea for a new roof..
It is called "peel & seal" rubberized self adhesive aluminum faced roofing!
Found
HERE for $160 per roll.
This is what one RV dealer shop uses and that is what they told me to use.
The rolls are 36" wide and you overlap 6" and on a RV roof that means you place a strip at the sides of the roof and one strip right down the middle.
I have a 26' TT and used 4 rolls in total..
The stuff is super, super sticky.., Roll out, peal the backing off and use hand roller to press it down well paying close attention to the overlap areas.
Going on 5+ yrs now and no more roof leaks, not even where the FRP buckled and ripped.
Installed mine right over top of the bedliner and the FRP but you can install it directly on wood decking.
If your RV is worth it to you, please do not use bedliner or rubberized paints, that is a waste of time and money. Remove your existing roof membrane, replace any damaged wood decking found and then either buy purpose made RV roofing or try the self stick roof material with aluminum surface.. The aluminum surface protects the rubber from UV exposure.
