Winnebago Adventurer Roof issues

I think what some are missing in this thread is even though there are no structural loads going through that lap joint there is probably 1-2 psi air loads at 60 mph. That does not seem like a lot until you look at the surface of the roof which is a huge area. Adhesives are strong in tension compression and shear but very weak in peel. Once an edge begins to peel your see what Mike posted above. I don't know the caulking/adhesive that Winnebago recommends but even with good structural adhesives "chicken fasteners" (rivets) are used to eliminate the peel forces in composite airframes. Once an owner fully understands this issue things like extra eternabond or a compression strip with screws can be added or just check it every 6 mos and recaulk. I would feel safer with the first two options.