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 a floor with tile.
Remove the baseboard and trim surrounding the tile floor to make space for the new surface level.
Tip 2 use at least a 4ft level or straight edge to find dips and humps.
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.
How to use a floor leveling compound over ceramic tile step 1.
How to level a floor for installing tile before you install file flooring follow the directions above for fixing high spots and low spots in a wood or concrete subfloor.
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.
Before we get started.
Floors are rarely perfectly level.
Search the floor for any loose or damaged tiles.
Whether the room is 20 x 20 or 4 x 5 the methods are the same for floor leveling.
Tip 1 stretch out a chalk line to find dips and humps.
Then vacuum the floor with a wet dry vac or sweep it with a broom.