Discovered this on the last trip a few weeks ago. Its around the bathroom sink, toilet, tub area. I'll be removing all the stuff in the bathroom and taking out a couple of walls to get at all of it. Will be repairing the floor with wolmanized ply. Anybody have any tips and things to look out for? Edwin PS- Any RVs made out of wolmanized wood instead of cheap junk that rots with sweat?