How to fix a concrete floor with dips step 1.
Fix dip in floor.
The easiest way to find out if your floor is out of plane is to use the time honored marble method.
Determine the underlying 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.
Deal with a delaminated.
A taut string stretched across the floor will show the amount of deflection and improvement.
Compound can correct sags and dips as deep as 1 1 2 inches.
The solution to sagging floors or the damaged sills and joist ends that contribute to them often involves jacking.
Nearly all will say that if a floor slopes 1 and 1 2 inches in twenty feet or more that there should be further investigation.
Self leveling compound when you are dealing with uneven floors one option that you have is to use self leveling.
Drop a few marbles.
3 options for uneven floor repair 1.
Clean the concrete floor completely.
Fill any cracks in the floor with joint repair sealant using a putty knife.
A common scenario is to install temporary jack posts and support beams then permanent posts and beams over new footings.
By putting in new.
Plywood another option that you could utilize is installing plywood on top of the old subfloor.
Fixing a floor that sags and dips pour self leveling underlayment in the problem area.
Basically they are saying if a floor is sloping over a 1 2 to 1 inch in twenty feet then there is concern.
Sweep the surface of the floor.
Floors that slope 2 or 3 inches in 20 feet would be a very serious concern.
Scrape the surfaces of the filled.
Sistering might do it as well and if you did that you could set the new ones level and attach new subflooring to those and that would get rid of the dip as well as strengthening the floor.