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Old 11-11-2006, 01:38 PM   #1
D&BT
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I am redoing my master bath. The house was built in the early 60s'.
It has a tile floor, and I just took out the bathtub to replace it with a claw foot tub. My problem is the tub was installed before the floor tile. I now have a 3' x 5' hole thats need to be filled in, and it looks like the base for the tile is concrete, about 4" thick. I need to level this area so I can tile the whole bathroom. Any suggestions.
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Old 11-11-2006, 02:06 PM   #2
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Some slc, or wet thinset if it's about 1/4"deep, if it's deeper, a drypack over thinset bond coat...look i our Liberry for ,also.
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Old 11-11-2006, 07:46 PM   #3
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Looks to me like it's going to be hard tiling under the tub. I would take it back out, tearout the old tile floor and retile the whole thing.
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Old 11-11-2006, 08:29 PM   #4
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Welcome, D&BT. Please give us a first name to use.

I think he/she means the old tub was installed pre-tile, Davy, not the new one. But that's just a guess, eh?
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Old 11-11-2006, 08:42 PM   #5
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I missunderstood again. Filling in the space will work but I'd still take up the old tile.
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Old 11-11-2006, 08:47 PM   #6
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If your floor is a concrete slab....why not just use some readymix concrete and fill'er up and screed the area flush with the rest of the concrete floor? If you were to go that route I'm not sure how long you would need to let that concrete cure before you could tile over it.

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Old 11-12-2006, 08:41 AM   #7
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Sorry, new to this.
Our names are Dave and Belinda in Ky. Our house was built by an architect, who was the orginal ower until 1992. Everything is heavy duty, and very well built. The claw foot tub is not installed yet. We have taken out the old tub, which was on the subfloor. The tile floor was build around the tub. This is all on the 2d floor. The base for the title floor looks to be 4" concrete, with the tile on top, hince the hole where the tub was.
Thanks Dave
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Old 11-12-2006, 09:24 AM   #8
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Then I agree with Davy. Remove the existing tile, clean up the concrete(?) floor, then re-tile the whole room.

Four-inch concrete on the second floor is a bit unusual. How sure are we of the detail there, Dave?

My opinion; worth price charged.
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Old 11-12-2006, 12:09 PM   #9
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Ok, whats the best way to fill in where the old tub was. I would like to level this area, then retile the whole bathroom.
Thanks Dave
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Old 11-12-2006, 12:38 PM   #10
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Was the old tub recessed into the concrete? How deep do you need to fill?
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Old 11-12-2006, 01:26 PM   #11
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Yes about 3 to 4 inches.
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Old 11-12-2006, 01:35 PM   #12
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I would tear out the old tile then use concrete to fill in the area where the tub was. You are going to need to let this new concrete cure before tiling over it. The standard is 28 days but you can probably shorten that somewhat.
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Old 11-12-2006, 01:51 PM   #13
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What about the finished height w/ adjacent floors?

If tub was sunk 3" to 4" below the tile there is some custom framing going on. Or did you mean 3/4"?

Does your town's building permit dept. save blueprints for permitted jobs? If so...................

In my experience ya usually never go wrong ripping out old surfaces. And you never go wrong waiting full cure time.

Last edited by Tom Tee; 11-12-2006 at 02:21 PM.
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Old 11-12-2006, 01:54 PM   #14
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I want to add, it would probably be a good idea to tie the two slabs together with some rebar. Maybe one of the engineers could comment on that. Also a crack isolation membrane would be a good idea to use over the joint between the old and new concrete.
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Old 11-12-2006, 03:33 PM   #15
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I have not been able to contact the original ower that built the house for some time. By looking at the 2 bathrooms that were built, they also back up to each other, the subfloor for both are 3 to 4 inches, yes inches, below the hardwood floor surface. Like a sunken livingroom would be. So each bath have what looks like 5/8 plywood sub, and what looks like concrete base, and 1/4 square tile which is level with the hardwood floors. When we removed the old tub, I never thought that it would be below the tile line. I have to take care of the hole where the old tub was, and make it level with the rest of the floor, so I can redo the entire floor. Thats my problem.
Thanks Dave
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