Rotten bathroom subfloor
Okay, today I peeled back the bathroom vinyl floor to find a wet, moldy mess! It was literally sopping! Looks like the wax seal around the toilet has been leaking. Lo and behold, the underlayment is PARTICLE BOARD! How is that even legal??
Under the particle board is 1"x5" tongue-n-groove planks on 48" on center joists. There is a joist running down the center of our bathroom- so if I rip out the subfloor I'd have one joist to nail to but couldn't reach the next joists over unless I, oh, knock down some walls.
Add to this I am horribly claustrophobic and while I'm very handy with a circular saw and have a kickass hitachi framing nailer- it is unlikely you'll get me under the house into that crawl space. My husband is an engineer for Google and his comment was: "I'll be happy to fund the project but beyond that, I need to keep all my fingers."
What do I do? Should I leave the subfloor open and see if it dries out? It doesn't seem rotted out- not coming apart like the particle board and the plywood under the vanity was. It isn't sagging or bouncy or anything, but I would hate to cover it back up if that is the wrong thing to do and just end up with more/worse problems down the line.