If an engineer found no structural issues you may be able to level the floor by applying a cement based self leveling floor product such as henry level.
How to level a floor with sleepers.
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Apply a 1 4 inch bead of construction adhesive around the perimeter of a wood shim and turn the glue side toward the floor.
Please read before you ask why i didn t just fix the foundation beams or joists.
After making sure that the floor is level use cedar shims to level the sleepers.
To level a floor start by removing the existing flooring.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
Lay a 4 foot level across the sleepers to make sure they lie on the same plane.
While most floors are relatively level some are purposefully constructed on a grade such as garage floors or basement floors that slope toward a floor drain.
Sleepers are individually cut furring strips that install.
Repeat the process across the entire floor to level all remaining sleeper joists.
Work your way outward from the interior of the room.
Then mix leveling compound according to the instructions on the package in a large bucket.
Fasten the sleepers through the shims with powder actuated fasteners.
Insert cedar shims to raise the sleepers at low spots.
So happy its been of use to soooo many folks out there.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
There was a brick chimney estimated to weigh about 2200 pounds that was si.
Slide the shim under the sleepers until the air bubble is in the center of the level.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.