Travel star 21 sb floor construction

Thanks i looked at that thread, the layout of the rv in the first pick is exactly like my camper but it sounds like it is different make. The damage in my camper is not that extensive. I am torn between just drying it out and impregnate it with epoxy like Rot Docctor. I am concerned with the wall. It looks like it is sitting on the floor. The wet area is next to and under the wall for a distance of about 4' also if there is some kind of foot plate in the wall. I will take i pic tomerrow for you guys to take a look at.

Best bet to know for sure is to contact Starcraft, or, open it up and see. Our Starcraft roof is the sandwich material with no joists except where the AC sits. The floor I'm sure has joists, but I'm not sure if there is a similar sandwich material (for insulation purposes) or not.

On my Jayco 23b, we pulled the tank off underneath, replaced the plywood, after spraying it with rubber coated stuff (sorry can't remember what it's called). We then went inside pulled up the rotten wood all the way down, used 2x4's as floor joist, a layer of plywood then luan and replaced the vinyl. Not sure if there are joists throughout because we only had to fix a spot probably 3'x3.5'