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.
Best for leveling floor for bathtub.
Set the tub on that board and shim as needed to make it firm.
Once all is well shims are secured in place with silicone caulk.
Tub you are making a fairly simple job into a project.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
Here are some of the best selling floor leveling products.
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.
Additional shims are added as necessary to level the tub.
Best floor leveling products cost and where they re sold.
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.
Set the top of the leveling board at that height and then nail it to the 2x4 s level.
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.
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.
5 cm thick in one pour and seeks its own level in minutes.
Rutland floor level is a floor leveling compound in a premixed tub.
Check the floor in front of the tub.
Both regular thinset mortar and floor leveling compound are suitable.
Measure the length of the tub s legs or the distance between the base and the bottom of the side flanges.
The legs will be hidden if placed in mortar so this method of leveling is best for.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
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.
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.
The 5ft and the 32inch determine the highest spot.
The cost is about 11 for 3 5lbs at amazon and about 57 for a 25lb tub at wal mart.