What are “foundational materials” and how do I set my whirlpool bathtubs unit in them? May I use foam or sand?
Izzi Whirlpool bathtubs do not require these materials when properly shimmed, although some installers prefer to use them. If this is the case, the foundational materials Izzi recommends are casting plaster or mortar. Several mounds of the plaster or mortar should be placed on the sub floor where the floor of the unit will rest. The mounds should be good sized (about 12″ dia. and 6″ high.) Set the unit in the alcove on top of the plaster or mortar and level the unit. The mounds underneath the unit will depress and spread out into one another so that the entire bottom area of the unit is supported underneath. The use of sand is not recommended as it can shift and hold moisture. The use of foam is also not recommended, as it is difficult to regulate and can be unevenly dispersed under the unit causing stress points in specific areas. Over time, foam will also compress and no longer support the bottom of the unit.
