My house had a small amount of termite evidence on a floor joist when we bought it five years ago. Inspection revealed that they were old tunnels, and were vacated, and the house had been treated. The joist in question was sistered when the house was built and the tunnels ran between a gap in the two.
I noticed that one of the two was collapsing at the end, and probing revealed the joist is very damaged up to about two feet from the basement wall. The rest is solid, at least on the outside.
I was going to prop a joist up opposite the damaged one, cut the damaged joist out, and sister in a new one. If I find damage in the original sister, I would then remove the prop joist, and cut out the sister, and permanently install the prop joist as the new sister. The span is about twelve feet, and there is an interior wall above.
Is this a bad plan? I noticed the sagging when I found a squeaky spot in the floor near that wall, but the deck seems mostly untouched by termites. i didn't know if I should just sister in a third joist and
call it good. Some say to leave the original, some say to remove, and I'm unsure what plan of action to execute.
FABO's home-construction expert opinions are appreciated!
