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iwannabeer 11-29-2012 07:17 AM

Cut floor joist
Hi everyone
I've been reno-ing an old house (100 years old) gradually and will preface this by saying the work done in the past is just horrendous, so just looking to make things right or as close to it as possible. In tearing apart a spare bedroom to lay new sub flooring, I came across a floor joist that has been cut 2/3 of the way through to run both plumbing and duct work for a heat register.

Now, there is a wall for this spare bedroom that rests on this joist, which also adjoins my bathroom. I will be looking to bump this wall about 16" into the spare (or to the next floor joist) that I am working on to give the bathroom a little more room. I've noticed a small sag close to where the cut has been made, as well as in the kitchen the floor, which is directly below (just a very slight sag in both cases).

Wondering what my best option is to repair this? I was hoping to be able to sister some pieces of 2x10 to the joists on either side as opposed to running a second joist from side to side. Last thing I want to do is not do this now as I know it can only get worse.

The other question i would have is, would I need to also create some form of support in the basement under where the kitchen floor is sagging? Its only a very slight sag at this point. I currently have access to the ceiling in the basement, which is semi-finished with a poured concrete floor and have no issue tearing down the ceiling in the kitchen to access what I need to repair in the spare upstairs.

Any insight/advice would be greatly appreciated.

gregzoll 11-29-2012 07:58 AM

Post a picture to show the damage.

iwannabeer 11-30-2012 02:33 PM

1 Attachment(s)
Hey greg
Thanks for your response. attached is the best shot i could get.
If you need another let me know and ill try again.
But you can see the depth of the cut into the joist here.
Any help would be greatly appreciated.

Attachment 61254

gregzoll 11-30-2012 06:59 PM

Need one farther back, showing the next joist over from it also. If that is just attic space, sister another next to it, and you should be fine.

But from what it appears, that is very old damage, and if anything would have happened by now, there would be signs down below.

If there is a wall directly below that beam, it could be carrying all of the weight, and will stay like it is until the structure falls down.

BigJim 11-30-2012 07:30 PM

From the picture it is hard to imagine that being a floor joist, could it be a ceiling joist?

JazMan 11-30-2012 09:28 PM

Sure doesn't look like a ceiling joist to me. Ceiling joists usually have air under them. Looks like a floor joist resting on a pier/post or half-wall to a crawlspace configuration. But hard to tell from here.

Please take another pic, everyone wants to get too close and we can't tell what's going on.


joecaption 11-30-2012 10:15 PM

While your in there you may want to add some foil duct tape of that joint. Looks like a hole in the duct.

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