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.
How to level an uneven chipboard floor.
Answered 7th mar 2015.
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.
Over time concrete floors can settle unevenly or become uneven due to cracking and moisture.
This compound can potentially be utilized on a concrete slab or a wood subfloor and it works well when you are dealing with dips in the floor.
Floors are rarely perfectly level.
It s a bit confusing but a flat floor can still be slightly out of level and still create a good foundation for a long lasting floor installation.
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.
When you are dealing with uneven floors one option that you have is to use self leveling compound.
If height is an issue take up the chipboard level the joists overlay with suitable thickness wbp plywood and then secret nail or float your new floor over the top.
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.
Laminate flooring on an uneven subfloor can cause problems and needs to be addressed.