If you open it up, I would love to see pictures. We have a 2002 Thor TH and our sofas are fine so far. We have one window by the rear door that leaks and we've had to go in and rebuild due to water damage. We ended up painting the luan board a solid color so that we could hide the fix. Always interesting to see what's behind that luan board.
2001 F350 7.3 PSD 4x4
2002 Thor Tahoe Transport 33TB
2004 2332 VW sandrail, 4 seat, long travel
1993 Grumman 14' fishing boat