Have a helper lift the tub while you place shims under the legs or where the base touches the floor.
How to level an uneven bathtub floor.
If you have access to the basement or crawlspace it is possible to jack up saggy joists until they are level and then sister them so that they remain straight after the jacks are removed.
Leveling with shims means setting the tub in place and checking for level then with a helper sliding hardwood or metal shims under the tub where the base reaches the floor.
Again it s rechecked for level on all sides.
Use metal or hardwood shims.
It will find the lowest areas of the floor and work to level out the subfloor.
Fixing a floor that sags and dips pour self leveling underlayment in the problem area.
How to fix and level a bath.
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.
You can then spread it out on the floor in the affected areas.
Set the tub in place and place a level on one of the long sides.
Additional shims are added as necessary to level the tub.
You mix it with water in a bucket until it creates a thick paste.