TT with Wood Rot on Slide - Need Fix!!

That wood rot will also be under the slide flanges so the only way to truly fix this is remove that wood entirely and replace it with marine grade plywood, as already suggested. I'm dealing with a similar wood rot issue in my stick house, discovered when I pulled the main floor toilet and found the wax seal had leaked. :M I've cleaned out the mess but am left with a rather large cavity around the floor flange that I need to fill in before installing the new flooring and toilet. No way I'm replacing a whole section of sub floor so if I could I would use an epoxy filler designed just for this purpose called Rot Doctor. It's hard to find here in Canada though so the best I could come up with is a similar product called P.C. Woody which I hope will work as well.

Whether stick house or trailer water is your worst enemy. :M