DIY Home Improvement Forum banner
1 - 6 of 6 Posts

·
Registered
Joined
·
66 Posts
Discussion Starter · #1 ·
I'm going to sister a joist that has been notched in the middle of the span for a shower drain, and ended up having some rot from drain leaking. Id like to cut out the notched/rotted part out, splice new section to it, along with adding a sister joist to it. What would be the best way to splice in new wood? The splice would be in middle pf the span. Could I get by with just cutting out rot and sistering new joist with glue and nails, and not try to splice an additional piec on to the original joist?
 

·
retired framer
Joined
·
59,593 Posts
Edit to add: joist span is 11' 4", 2x10 dimensional SPF
If you are doing a full sister, you don't need anything in the cut out.

Sister with 3 nails every 12 to 16 inches, no glue required. You can add back a block in the cut out area for catching nails from above.

When you are cutting away rot there maybe some areas that just have stains that you will leave in place. It is a good idea to paint over the stains with a copper treatment like for treated lumber, to be sure you are killing any rot that might still live there.
 

·
Registered
Joined
·
66 Posts
Discussion Starter · #4 ·
Ok the plan is a full sister, so I'll get rid of the rot and any stains and then just nail a fitted 2x in there. So would the old joist still carry load at this point? Also do you know a good way to roll the new joist in? I was thinking of chamfering the end edges to get it in there, kinda tight space. Could I also just notch put an inch or so on the ends and then shim them once I have the joist in? Thanks
 

·
retired framer
Joined
·
59,593 Posts
Ok the plan is a full sister, so I'll get rid of the rot and any stains and then just nail a fitted 2x in there. So would the old joist still carry load at this point? Also do you know a good way to roll the new joist in? I was thinking of chamfering the end edges to get it in there, kinda tight space. Could I also just notch put an inch or so on the ends and then shim them once I have the joist in? Thanks
You can rip the whole thing down so it is 1/4" smaller than the old and put a spacer under the ends to get it up tight after you get it in. Put it in so the top is in first so you can hit the bottom into place. .
 
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top