We are currently renovating the bathroom and have purchased a deeper acrylic tub with an apron. In the instruction is suggest a cement base covered by a plastic film. Could we not build a wooden frame based with plywood top and a water resistant membrane to support the tub. We could have the tub upside down and make it fit to the bottom of the tub before placing in? Thanks:)

Sounds like a plan to me! Good luck, Tom

From my experience it is not a good idea to put tub on plywood. If you use mortar it will contour itself around the shape of the tub. Also, it will suck the tub to it as it is drying. Tub will be sitting in the mortar like in a custom made glove. If you put it directly on plywood, it will not sit solid and can buckle as well as shift.

Use 2 X 4s under the ply wood to brace it up but Milo's correct, mortar's better.
Good luck, Tom

Hi all... mortar isn't only better, its easier than doing the plywood and 2"x4"s... ;)

Takes a bit to mix, but in the end, as Milo suggested, makes a fit that is like a "custom made glove" (Milo) and also acts as an INSULATOR that reduces the heat lost from the water. This will result in a longer, more comfortable bath experience.

Good luck...

MARK

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