Insulating under tub


Old 03-01-04, 09:09 AM
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Insulating under tub

I am putting in a shower/tub unit (fiberglass). It is going on top of a cement floor. I figured that i should insulate between the floor and the tub or if someone wants to take a bath, much heat will escape.

What should I do this with? Foam I imagine but is there a specific process?
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Old 03-01-04, 09:31 AM
Ed Imeduc's Avatar
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
About any way you want to do it . The polystyrene sheets would work out for you. Cut them to fit the bottom of the tub. Around the tub Id go with fiberglass. ED
Old 03-01-04, 10:19 AM
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Thank you Ed. I will a sheet to fit around the tub on the floor, leaving holes for the plumbing. Then I might just stuff in some fiberglass in the empty pockets.

BTW - the tub unit has to go pretty much right up against the wall becuase of where the toilet plumbing has been roughed in through the concerete slab. I will be 'framing' the wall with 2x2's and putting polystyrene sheet between this framing as well with the same vapor barrier agaisnt the wall, then the polystyrene, then the vapor barrier again before attaching the tub.

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