Just sold a palomino camper with soft floors. Had what they called bonded floors which is Styrofoam with thin ply wood attached. Can't repair them because seams won't hold as that floor gives a bit u...
Last time I had a TT with a bad floor I just screwed 1/2 inch plywood down over the entire floor. Then I put floor tile I bought at Shopko on the top. The lip of the door on the TT was just the perfect height that it allowed me to do this.