Under side of camper rotting

I know this is old, but we are having the same problem. What did you ultimately figure out? Thank you In advance!

In our case, we were working on a Coachman Captiva. We took the entire from cap off and replaced flooring for the from third of the camper. Luckily for us, the tanks were all in the back section. We lifted the whole front end off of the frame by removing baggage doors and running beams through supported on the ground. Not usually an option for Rpods. We tore the entire front bedroom out a piece at a time to get to the floor. Every trim piece removed was written on on the back so we knew where to put it back. Screws were put in zip lock baggies and also marked.  It was really depressing to open up the walls and see the scrap wood they used to build the front nose. Some gaps were only held together with staples and no wood. It took us about three weeks and was a royal pain, but it is built better than it was when it left the factory. We also replaced our slide floor. I would guess you will have to drop the tanks on an Rpod. You definitely don’t want to leave any rotted wood in place. We used Sikaflex urethane caulk found in the cement department of Home Depot to recaulk our entire RV. We replaced all Butyl with new, then covered any edges that showed with the caulk on the advice of a professional RV serviceman. He says Butyl rubber cracks faster when exposed to sun. It’s been two years and the caulk is still looking great. People: don’t forget to caulk over the top and sides of every light or fixture that penetrates the skin of your RV!

We used Tyvek house wrap to wrap the new flooring we installed on our Captiva when we had to replace some water damaged flooring. When tearing the Captiva apart, we found we had a lot of water infiltration from where the marker lights went through the skin. Be sure if you’re having to laminate flooring parts you use glue between layers to get that solid floor back. That will get the flex out of the floor. We learned this the hard way.

Did you replace the wood on the underside and re-wrap it. How did you fix this. Mine is mush too. See my other post for photos.   https://postimg.cc/gallery/1m75234sa/ 

Replacing a floor in a camper is difficult but not impossible. Learned alot from the last one I did. I don't know how FR does it, but our Chalet the skin was not attached to the frame. It was attached to the floor wich was attached to the frame. We had to replace the floor in sections, after the entire inside was stripped. Your R-pod is not junk either you or someone else can save it.