2manyrocks
Super Member
- Joined
- Jul 28, 2007
- Messages
- 7,385
With the exception of Airstreams that are essentially built like aluminum aircraft with an overlapping aluminum skin riveted with aircraft rivets to an aluminum frame, many (but not all) RVs are nothing more than sheets of aluminum butted together over a thin, white wood frame. The seams between the sheets are sealed with sealant that will dry out and start leaking in a few years. The weight of roof top air units presses down on the roof. Traveling over bumpy roads can increase the chances of leaks and roof failure. Then's there is the use of foam insulation that can become waterlogged from leaks resulting in walls rotting and saggy floors.