I just bought an 1895 farmhouse. Noticed that the floors are sagging towards the center of the house. During the inspection, found that the entire house is supported by a 12" square column of sandstone in the center(house is approx. 24X24', 2 story). Also, floors have significant "bounce". Floors are 4" tongue-in-groove pine over joists with no subfloor. I'm hoping to do several things:
Add more supports along the length of the main beam.
Add supports to the joists near the center of rooms to stop the "bounce"
Remove the plank flooring, add a sub-floor, flip planks to reveal "good side" (current surface is heavily gouged & in bad shape from the family of seven that lived there for 95 years) & reinstall & refinish.
I'm also considering "sistering" some 2x4s(?) to the existing joists at a slope to make up for the sagging floor (as an alternative to jacking the floor).
Is this do-able? I'm confident in my ability but someone has suggested that removing a plank floor would be close to impossible. Plus, with an 18" crawlspace to work in, I'd rather have the floors removed for easier access.