Remodeling our home and found out a few of the floor joists have dry-rot where the floor joist sits on the wall top plate. The wall to wall span that the joist sits on is 11'. Three questions on best approaches.
Note: I will be having county inspections in California for this and other new work.
I'm thinking of adding a sister joist next to the one that has the dry rot to raise up and support the joist in question, but lumber is sold as 2x12 or 2x10... But the existing joist is 1.5"x11" exact. So in theory the lumber would need to be 2x11.5".
- Do I just get a 2x12 and cut down the full length to size? Or do they sell lumber at these (weird) dimensions?
- If freshly cut wood is installed, in theory would the 1.5x11" shrink? Or is this something that shouldnt be considered?
- Can I add a partial sister joint where the dry-rot issue (one end of the top plate) is at or do I need to span the full 11' for both ends to sit on a top plate?
Thank you in advance!