I took my coach to the auto body shop and they showed me another coach they were currently working on.
Evidently the poor owner of this coach bought it and his wife soon passed away. It sat for a few years and he then started to use the coach again. The ceiling panels were sagging so he brought it in to the shop.
The ceiling panels and the insulation were saturated with water. Any wood in the ceiling was rotted. Mold covered everything in the ceiling. They had to pull all the cabinets out, take out the ceiling, insulation and the fiberglass panel on the roof. A $20,000 repair...
Here are some pics:
Plywood under roof rotted.
Coach with no roof.