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...
From what I've seen, the majority of trailer manufacturers use a laminated floor construction (vinyl - luan - foam - luan - water barrier). Any trailer with "Light" "Ultralight" "Lite" or the likes in the name will most likely be built like this. The few trailer lines I know of the don't use a laminated floor are made by Northwood Manufacting and Outdoors RV.