There are several parallel discussions going on concerning delamination under the refrigerator vent. Crocus has got an excellent thread going on the possible cause of this problem. Instead of piggy backing on 1 of those thread, I thought I would start a new post, as I intend to add the repair work later when that is done.
I noticed my delamination problem in October.
I took the trailer to the dealer in November so he could see what was happening. The service manager took a look, and picked at the caulk and it was loose.
The service manager thinks that the luan plywood is separating where it got wet, not actually the fiberglass separating from the backing. Same results.....it looks ugly.
This is how easy the caulk came out of the seam.....it easily pulled out as 1 piece.
And what the seam looks like with no caulk in place:
It turned cold right after the trip to the dealer, and I have been unable to recaulk the area, because the daytime temperatures have barely been out of the low 40s. As a temporary measure to keep more water out of that area, I wrapped a garbage bag around the vent:
That will keep water out of the vent, but does not stop water from entering between the vent and the frame, so I want to repair this as soon as possible.
Another area to be aware of with caulking is the base of the water heater. Mine was not done properly, and the 1st time I drained the water heater, water ran back into the camper. I recaulked that area, and no longer have that problem.