The area under my front closet is sagging to the point that it has bulged the exterior skin downward. This is the exterior area just aft of the pin box. I originally thought it was from weight inside (this is where the washer/drier would be installed) but the floor in that area is solid. I have no idea what could have caused this as we have never had a washer and drier-we just store household items in there. At this point the fiberglass skin on the outside under this area is about to pull out from the trim and I am concerned about traveling with it like this. Is this a common problem on this model? Is so, what is the remedy?