Island tub into an alcove [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile


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03-04-2007, 12:23 PM
I got an island whirlpool bathtub from an auction and want to put into the existing alcove to replace the 50 year-old cast iron tub. How do I ensure that there is a snug, watertight fit between the walls and the downcurling lip of the tub?

I don't have much room for a plyboard shelf to rest the new tub on so wanted the back edge to be virtually flush with the wall. I was thinking of laying some sort of membrane under the tub lip and then nailing it to the studs about six inches up and then covering with greenboard and with caulk at the base joints to make it fully waterproof.

Do you think this would work?

How should I approach the tiling down to the tub surface?

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John Bridge
03-04-2007, 06:32 PM
Hi and welcome. :) Please give us a first name.

Don't depend on greenboard for anything. It's the opposite of waterproof. It's a sponge. :)

I would get the tub right up against the studs and then put a liberal bead of silicone on top the rim right under the backerboard (if this is going to be a shower. Tile down to the tub deck and use silicone under the bottom row of tiles. :)

03-05-2007, 11:23 AM
Hi John, thanks for the welcome. I like to go by Grinner on all the fora that I use. Makes it easier.

This isn't going to be a shower but I want to have a tile backsplash so was concerned about the seal. Thanks for the tip on the backerboard.