3

I'm renovating a 2nd floor bathroom and I made the mistake of cutting out the subfloor flush with the wall shared by the doorway. The problem is that this wall sits between 2 joists so my new and existing subfloor butts up against one another in unsupported space.

Subfloor 1

Subfloor 2

My original solution was to install blocking but the issue is that there is round duct work that runs directly under the wall between the joists. I've considered adding another joist but there is only 5 inches of space between the joist and the duct work. What is the best solution given this situation?

enter image description here

  • 1
    You need to get support somehow for that floor board. If you need to get an HVAC guy to temporarily remove that duct to add a joist or cribbing. – d.george May 20 '17 at 10:13
3

Ended up creating a bridge under the subfloor gap using a 2x8 that sits on a 2x4 sistered to the nearest joist. I used construction adhesive and screws to attach both subfloors to the bridge. There is no longer any bounce in the floor.

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.