azrving wrote:
That's the best thing to do. Pay attention to floor materials and construction methods. SOME lightweight models will use sandwich foam which can have issues with soft spots forming.
Sadly true ! In most (all ?) cases the floor was fabricated pretty much a wall would be built. Aluminum frame, solid foam, Azdel (or similar) bonded to both sides. This is fine for a wall, but the load placed on the floor from walking on it causes the panel to flex and the bond to fail. IMHO, if a lot more aluminum tubing was used in that frame it might work ! A thicker composite (Azdel) would help a lot.
Most trailers use 3/4" plywood, just like in your house. The problem is, roof leaks can, and often do, run down the inside of the wall and then on to the floor. If the floor starts to rot, the RV will likely have to be scrapped
(too expensive to remove the affected interior cabinets/appliance to replace the floor).Only toy haulers, eggshell RVs(?) and high end Class A RV use metal floors.
