Repairing Water Damaged Subflooring
When I purchased my house, there were a couple of places were there had been water damage from a leaky steam radiator and the bathroom tub. The water damage only affected the sub floor and not the joists, and since I hadn't lived here (the apartment was rented out), I forgot about the issue. Now that I am living here, its one more thing on my list.
The old sub floor looks like 1x8. The worst area is next to the bathtub. It's actually under a closet wall for the bedroom next to the bathroom. If you put weight over the area, a gap appears below the baseboard trim.
My plan is to replace it from the bottom by cutting out the rotted area so it's square, and cut sections of 3/4" or 1/2" plywood to fit between the 12" OC 2x8 floor joists, and then support the plywood with blocking between the joists. The finished floor is original hardwood and it really isn't an option to rip it up and replace the sub floor from above. The closet wall is NOT load bearing, just a partition wall.
Attached are pictures.
Anyone had to deal with this same situation? Any tips or tricks? Advice? Have I gone mad?
Living Room Entry (Leaky Radiator):
(*please disregard the plywood with insulation attached to the bottom of the floor. This is to block the hole which an old steam pipe passed through for the radiator. (I now have a baseboard hot water system) A faux register vent was attached to the top of the floor.)