My 1986 Escaper has leaks. Not exactly sure where, I suspect the vents at least. The ceiling inside is soggy, the floor is soggy. Not sure about the walls yet. We are planing to replace the ceiling, floors, walls and sealing the roof somehow. I've posted a photo of the current state inside the camper, and a close up of the roof from the inside. It looks like the ceiling is made up of thin wood then foam board then more thin wood. Any suggestions for replacing the ceiling? is there a better way to build it or insulate it? Can I do this without removing the roof? I've put a photo of the roof below. I figure it's best for us to reseal the roof before rebuilding the inside. Thanks in advance for your help.