Foundation issues are not always the problem. Instead, it may be an issue with joists and beams below your floor that require shoring up. There are different ways you to address this problem:
If you have access to the basement or crawlspace, it is possible to jack up saggy joists until they are level and then sister them so that they remain straight after the jacks are removed.
- Lally Columns
Another fix is to place adjustable steel columns under the joists to keep them propped up. This steel column fix does require that the base of the column be secured to the basement floor and the top of the column be secured to the joist.
Another idea is to lay down new hardwood over the existing floor. A plywood subfloor would bridge any minor waves in the existing floor, and House Leveling – New Jersey
compound would help, too. You will have to make sure your joists can handle the addition of more weight from the plywood subfloor and 3/4″ hardwood.
- Hydraulic Jacking
One of the good things about floor deflection is that it is repairable. The bad news is that it often takes a long time. The solution to sagging floors, or the damaged sills and joist ends that contribute to them, often involves jacking. A common scenario is to install temporary jack posts and support beams, then permanent posts and beams over new footings. A taut string stretched across the floor will show the amount of deflection and improvement. Posts set on dirt floors should be upgraded to concrete pads with footings. Place wood posts on metal post supports to create a waterproof barrier between the post and the footing.
Jacking must proceed slowly; it took a long time for your floor to sink, so you can’t push it back up quickly without causing cracks and stress in the building. As with other structural repairs, jacking must also be done appropriately. You cannot simply put a screw jack under the lowest spot and start turning. Someone with experience should assess the problem and set up the posts and any necessary beams. You can then screw the jacks up a turn or two each month. Expect some cracked plaster along the way, and aim not for perfection, but simply stability and improvement.
Do you feel as if your floors are unlevel? If you’re house lifting new jersey, New York, Connecticut or Pennsylvania call W.A. Building Movers to assess the situation!