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Removing Subfloor for Wall Access

3117 Views 7 Replies 3 Participants Last post by  Gary in WA
I need to route some wires for wall mounting a flat screen TV, the problem is I have to cross 3 bays in the wall with no attic access because I am running these wires on the 1st floor of a 2 story house.

I was thinking that I might be able to remove the subfloor on the second story to gain access to the lower story wall.

Can you guys tell me if this will work? It is on an exterior wall, the floor joists are standard I beams.

My fear was after I remove the subfloor The I beams may still block me from getting into the lower wall with a tape to pull the wires up and back down.
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It's a lot of work but possible.

You shouldnt have any issues removing the subfloor and running your wires. Should you encounter something that hinders you from routing the wires just put the piece of subfloor back. Be sure to add blocking where necessary as most subfloor is tongue and groove and will be spongy if you dont add blocking
Is it likely that I will find that the sub floor is glued down? I have never removed a subfloor so I wasn't sure if I could simply pull it up and put it back down without replacing it?
Theres a good chance that the subfloor will be glued, so you will need to replace it with a new section of subflooring. Dont forget to chisel the excess subfloor adhesive off the top of the existing floor joists!
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