On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
Leveling bathroom floor.
Self leveling underlayment products can be used on concrete floors wood subfloors that are uneven but still in decent shape and even over ceramic tile floors eliminating the task of tearing.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
Clean the floor area to be filled with a broom or vacuum and dampen it with a wet sponge to avoid rapid drying.
Work your way outward from the interior of the room.
If the floor slants irregularly cut strips that bridge the cap at each floor joist.
Once the compound reaches a creamy consistency pour a thin layer into the sunken sections then smooth out inconsistencies with a hand trowel.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
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.
To do this simply cut several leveling strips the same size as the original strip.
To level a floor start by removing the existing flooring.
Screw the strips into the floor joists or subfloor.