Support for UNDER fiberglass fixtures
Does anybody out there still use a sand mix or nonexpansive foam under their fiberglass showers or tubs?
Does anybody out there still use a sand mix or nonexpansive foam under their fiberglass showers or tubs?
Source control, ventilation, and filtration are the keys to healthy indoor air quality. Dehumidification is important too.
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Replies
I remember setting acrylic tubs years ago in mortar for support.
Most of the fiber tubs I've seen lately have a strucural base, I still set them in foam. Partly to keep them from rattling and I also think the insulation helps keep the water warm and deadens the sound of an upstairs bath.
The foam can expand and raise the tub after instalation if you use too much foam. I counteract that by filling the tub with water immediately after installation.
We bed shower and tubs in mortar except cast iron units. DanT
Do you do that with a steel enamel tub as well? What kind of mortar mix?
Yes,
I still think it is a good idea to bed fiberglass or acrylic bases in morter mix.
Even with the wood structure underneath, I still blast two big cans of foam underneath.
Have a good day
Cliffy
Same dif as mortar, I've always used durabond. Easy, cures hard, water doesn't hurt it. I heard a plumber once talk about plaster of paris and durabond is something I generally have around. Thats how I got going there.
"If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man." - Mark Twain
I use Structo-lite which is a perlited plaster. It comes in 50# bags at about $16@. It's nice and fluffy
F
Another vote for Structo-Lite. It smooshes down as you set the tub but has enough body to keep the space filled. It does not expand.
Foam won't hold the weight.
All the plumbers I've seen use either mortar or plaster.