The only time i have ever seen a tub come out of level was not from the shims rotting but from the subfloor rotting from a leak.
Best for leveling floor for bathtub.
When leveled the inner leg sits on the floor and the tub flange sits on the ledger but the outer side of the tub lifts off the floor about 1 4 1 2.
Both regular thinset mortar and floor leveling compound are suitable.
Rutland floor level is a floor leveling compound in a premixed tub.
Set the tub on that board and shim as needed to make it firm.
If it is level then the tub will be level also.
Again it s rechecked for level on all sides.
Additional shims are added as necessary to level the tub.
A series of strategically placed piles is easier to control than a full bed and it provides comparable support for the tub.
This quick setting underlayment can be applied to 2 in.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
Best floor leveling products cost and where they re sold.
The cost is about 11 for 3 5lbs at amazon and about 57 for a 25lb tub at wal mart.
Their instructions assume an exactly flat floor with no suggestions on how to level but as i said in my first post they suggest setting the tub on the floor with adhesive or mortar.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
The legs will be hidden if placed in mortar so this method of leveling is best for.
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.
Here are some of the best selling floor leveling products.
Check the floor in front of the tub.
Levellite self leveling underlayment helps level floors prior to levellite self leveling underlayment helps level floors prior to the installation of ceramic tile natural stone resilient flooring carpet wood and other floor coverings.
Slc is a liquid material and you need a plastic one which will stay in place until the tub is set onto it and then spread out because of the tub s pressure.
5 cm thick in one pour and seeks its own level in minutes.
Once all is well shims are secured in place with silicone caulk.
Tub you are making a fairly simple job into a project.
Set the top of the leveling board at that height and then nail it to the 2x4 s level.