Then embed the tub into the mortar.
Mortar for bathtub.
Both regular thinset mortar and floor leveling compound are suitable.
The mortar provides a stable base for the tub to rest on when the tub is full so the casing of the tub doesn t have to support all of the weight and crack.
Whether you are installing a regular acrylic bathtub that doubles as a shower unit or a larger two person jacuzzi most bathtubs require a mortar base for the tub to rest on.
It should not be runny but rather stand up on it s own.
Unsupported fiberglass and acrylic tubs tend to flex under the weight of water plus bathers which can be bad news in terms of your drain staying connected and the tub base remaining solid and free of cracks.
Mix the mortar so that it can support the tub.
Thinset mortar is your default tile mortar for most indoor and outdoor applications.
The mortar provides a stable base for the tub to rest on when the tub is full.
Pour the mortar on the subfloor so that it s a few inches from the drain opening.
The mortar should be evened out and about 2 inches thick on all sides.
It is applied to the substrate with a notched trowel.
Setting tubs in mortar is a method used by professional plumbers who specialize in quality home construction.
Thinset is a mortar that is made of portland cement silica sand and moisture retaining agents.
Thinset tile mortar.
Thinset tile mortar has a smooth slippery consistency similar to mud.