On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
How to level single floor board.
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.
If the level isn t long enough lay a flat board along the floor with a level on top.
Cut first leveling strip.
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.
Raise the board until the level reads true then measure from the dip in the floor to the bottom of the board.
In this video we show you everything you need to know how to level a floor into a perfect flat and level floor in your bathroom using self leveling floor com.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
Floors are rarely perfectly level.
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.