I have an older house (1940’s) with a dip in the hallway leading to my downstairs (1st floor) bathroom. From wall to wall the hallway is 14 feet with the wood floor joists below running parallel to the length. I ran a line level and found the floor is dipped 2 1/4” max at about 1/3 of the length of the hallway. This 1/3 length point is closer to the bathroom.
Here’s what I’ve done so far:
- Looked for cracks in the floor joists from the basement. No cracks were found.
- Pulled tile up in the hallway to find that the previous owner tried minimizing the dip with the addition of plywood where the dip is at its lowest and blended the tile around it in.
- Had a few foundation repair companies come take a look. They both suggested jack/post systems to prevent any further dipping, but not a solution to level the floor. One quoted $2600 and the other $5600 for their specialized jack/post system. Again, the jack/posts they said would be used to support the joists, but wouldn’t do anything about the floor dip. They felt that the dip was caused by the joists getting wet at some point and warping. These joists are old rough hewn 2x8’s.
Any suggestions would be appreciated.