If the floor is uneven lift up the board until it is level so you ll know how much flooring compound you ll need to even it out.
How to level an uneven floor upstairs.
Floors are rarely perfectly level.
If the second story of a home slopes or sags and the first floor is level then there is a pretty good chance that the cause doesn t relate to foundation problems but to other issues.
If the area is very large use a long straight 2 in 4 in 5 1 cm 10 2 cm board and set your level on top of it.
Over time concrete floors can settle unevenly or become uneven due to cracking and moisture.
If the uneven floor is due to floor joists that have warped or twisted over time or were incorrectly installed the only way to level the floor is to remove the subflooring and shim the joists.
Raise the lower end of the level until the bubble is centered then measure the distance from the bottom of the level to the floor to find the depth of the dip.
Thre ways to fix a sagging or sloping floor.
If not your floor covering which is the solid hardwood laminate tile or other exposed flooring that goes on top of the subfloor will never be flat and level this problem can be fixed but it all depends on exactly what kind of uneven subfloor you have.
Lay a long level downhill on the floor with one end of the level on the level part of the floor and the other end at the lowest point.
Whether you want to refinish an uneven basement floor or replace or add new flooring on top of an existing concrete floor somewhere in your home you most likely will need to level the concrete floor.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
A subfloor is meant to be flat and level.