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Unread 03-26-2007, 05:58 PM   #1
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walkin shower with no curb..on slab

1. We are in the mists of an addition and we have a what is supposed to be a walkin shower and didn't want a curb. However the slab is poured completely level with the rest of the slab. I am guessing do accomplish that I would have to demo existing concrete in shower area and repour so I could pour at lower lever and build in slope???? I have build shower mud beds over wood floors but never over concrete is it basically the same process?

2. Concrete is new and clean no cracks , stains, oils, plenty of rebar in slab, should I use somethine like Schulter's - DITRA for the rest of the bathroom floor or just lay the tile directly over the concrete......using thinset of course.

any help is appreciated!!!!
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Unread 03-26-2007, 06:19 PM   #2
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If the existing slab is "Poured Level," the only way you can do this is to jackhammer out the shower area, excavate the area DOWN several inches and re-pour the slab. Not what you wanted to hear....but the only way to do it IMHO.
They didn't want it good, they wanted it Wednesday.
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Unread 03-26-2007, 06:28 PM   #3
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if you have enough floor area to work with there may be an option of using a ramp to create a "curbless" effect. Do some searching - it's been discussed several places here. The floor pros can add more detail.

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Unread 03-26-2007, 07:21 PM   #4
Tim T
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Hi I just built a 5x7 kerdi shower with ramp up to shower from bathroom floor
(wood frame floor) I made a curb the height of the highest point of mud bed 2 1/4".
I added 3/8" ply. on top of my 3/4 T+G py in the bathroom area which gave me a 1 7/8" curb from outside ,I then used Mapei Tri-Patch and made a ramp from 0" to 1 7/8". I laid ditra on bathroom floor which gave me another 1/8"+ which made the ramp a little lower .
I covered shower floor with kerdi and went right over the ramp onto the ditra with kerdi also.

I don't see why you could'nt do something similar
But what about the DRAIN

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Unread 03-27-2007, 09:33 AM   #5
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I know the plumber is going to jackhammer out the area around the drain so I guess I will just have him do the rest also. Then I can slope it correctly and not have to deal with building a ramp. Or maybe I will be lazy and jsut build a curb.... ;-) Thanks for the info.

What about the rest of the bathroom any reason I can jsut lay the tile right over the concrete or should I do the Schulter's - DITRA or some other type of under layment? I know the rest of the house the tile that was done before we bought it was layed directly over the concrete. I know becuase we also demoed one of the bathrooms. The tile was well adheared no cracks or broken tiles.....just the ugliest tile you have ever seen.

Thanks again.
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