This is on the front cap on a Access 24V class C. There are indentations approx 1" deep by 4-5" long across the whole face of the curve. Looks like buckling no signs of water leaks or bad caulking joints. I'm not sure of the construction is this Filon backed by foam? Has anyone any thoughts on this issue. (If you can't tell from picture, if this was made out of aluminum it would be like a kid hit it with a broom stick along the whole length)
It looks like someone had something like a canoe or kayak strapped to the roof. It's possible that when they tightened the straps they deformed the roof material. Look under the motorhome along the sides. I'll bet there are marks where the straps were attached to the body or the frame.
The sealant on the roof looks like an antenna was moved or removed to make room for whatever they carried on the roof. Winnebago doesn't make holes in the roof then cover them with sealant. If you order an option they will install it. If you delete an option (like a radio) the hole is never put through the roof.
I have a 2014 24V purchased new. I have the same "dents" in mine. RV dealer emailed Winnebago about repairing. Winnebago and RV dealer said was cosmetic only and probably due to heat but would not leak or cause a problem. Have not had any problems in over a year, but pictures/complaint is on file with Winnebago if there are any future problems.