I have a 2015 Grand Design Reflection 325BHS FW and the rubber roof lifts several inches just behind the front cap/roof seam while driving. There are no tears and all seams are sealed properly. I ...
I looked at a 2014 TT (about a 28') the other day, that the wind had blown over. It had rolled about 4 times. I noticed much of the roof material had pulled loose from the glue. The glue was still sticky, had not really set up since new.
I can see why wind lift, going over a FW roof, could easily cause the material to lift.
I can only hope my FW, was not put together like that wrecked TT.