I have an unusual creaking floor. I live in a stick built home that has had a creak since I have moved in.
I understand that most creaks are where the subfloor is lifting from the floor joist and the noise is the wood sliding up and down the nails. I also know that most say get access to the joists (I have a crawl space) and slide a wood shim between the joist and subfloor so there is no movement. I have been under the house many times and decided it was too much to handle this damn creak anymore.
The problem I am finding is though, there is no gap, zero gap whatsoever. I have 2 creaks within 3 feet of each other and I can actually very strategically step around/over them. Both are at the base of a stud wall. I was able to screw from under the joist at an angle into and up into the stud wall and it cured almost 80-90% of the creak.
That was 6-8 months ago, now the creak is back (its colder outside), and worse. I plan on crawling under the house this coming weekend... but what should I be looking at? Is the stud wall 'lifting' off the subfloor/floor joist?! Or is it possible that my joists are "bowing" (the creaks are in the midspan of the foundation wall and a support beam) and the joist and subfloor are being pulled 'away' from the stud walls... If thats the case... how can I tell? I put a level on the floor and it seemed pretty level (4' level)...... I have looked up ways to strengthen the joist and sister them... just wondering is this even a possibility especially with a 'level' floor.
Thanks, I am just trying to find out some possibilities to not have to go into this completely blind.