Subfloor Rotted Under Wall

Rotted subfloor under wall replacement question.

Subfloor rotted under wall.

The subfloor is a single sheet that goes under the wall from the kitchen to the bedroom closet. I cut out both sections for the subfloor and knocked off the rotted pieces that were still connected to the bottom of the wall. Chad positioned the subfloor plywood to go under the wall so he could lay out notches for the pipes in the wall. The damaged subfloor i m talking about is the old 1x10 floorboards laid diagonally over the floor joists and because of the termite damage the load bearing wall has crushed these floorboards completely in this small area in affect the wall and surrounding finish floor oak hardwoods has sunken about an inch.

I m trying to replace some rotted subfloor in my guest bathroom. Instead it appears to go under the bottom plate for the wall. This is where my question comes. Hi i m having trouble finding exact information about replacing rotted subfloor underneath an exterior wall.

Replacing the subfloor under a wall is not a beginner s do it yourself project especially if the wall in question is a load bearing wall. It was badly water damaged. For some reason i was expecting there to be an extra wide rim joist on the outside wall and that the floor would end right next to the bottom plate for the exterior wall. If you find mold growing the wood floor plates behind the wall are at risk of wood rot.

After cutting the notches for the pipes he positioned the new under wall subfloor piece to reach the floor joist scab and to leave enough room for the full sheet of plywood subflooring. The only sure way to find out is to remove a section of the wallboard and check the wood behind. I am replacing the subfloor in a 5 foot wide room on the second floor of my house. I noticed that this damage extended under the bottom plate of the exterior wall.