I have a Weekend Warrior Super Lite 5th Wheel. The floor was rotted away at the entrance (side) door in area about 30 by 20 in. It's a strange place since there is no plumbing there, although it...
I have no idea how any water got in there. It has a vinyl barrier on the bottom and no plumbing there that I can see. It appears that this is a separate floor section that was cut around the wheel arches and entrance from the rest of the floor. I've covered it with plywood for the rest of the season and will contact a contractor to replace it later.