questions about barrier free tile shower over concrete slab

suschmoo2November 3, 2009

my desire is to have an open , barrier free shower area. i will be removing the current cheap plastic shower stall, and hope to use the existing drain. our house is built on a concrete slab. can i use redguard or something similar directly over the concrete floor and tile directly over this or do i need a pan? i would use hardi backer for the walls. please advise the simplest way of doing this. thanks.

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I see no one has answered you so I will give you a couple of places to go to look for examples close to what your wanting to do. I am doing a trench drain with no curb and plan on using kerdi the orange stuff as well as Noble the blue stuff. you can find info on this subject with installation instructions that you can adapt to your situation. Also you might find some information on web site. Just go into the tile advice forum and look around and do some searches. You can also find some info in respect to handicap showers as they are built similar. I don't feel qualified to give you any instruction cause were figuring out as we go and God willing it will be correct. Good luck and if you find any good info let us know in here.

    Bookmark   November 4, 2009 at 8:24PM
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suschmoo2 you can have it the way you want it. My guess is you will end up with a custom built shape floor, and so this is best membraned with a liquid, paint-on or trowel-on membrane like Redgard (or many others). You can build a small speed bump, as a sill, if it's a small shower. To make the shower floor slope, you can build up a slope on top of the slab, or cut a bit into the slab. Your drain can be a trench drain, either by cutting or by building up. All this assumes you own the slab (if it's not a condo) and you know enough to be sure the slab can be cut without risking other problems. It assumes also that you want to breathe concrete dust by cutting. The point is that you must plan for a slope, and it is either made by cutting down or by building up.

I found john bridge and the key people at his site to be dodgy about helping anyone study options that would result in a non-Schluter solution. Schluter makes Kerdi, Ditra and other good things. Also, at the time I was there, some key contributors didn't understand that there is no deflection in a slab (it's not made with joists) so this alone might raise eyebrows. Also, they couldn't handle the idea that a homeowner might want a flat sloped floor with a straight line drain at the end; instead the inverted cone floor with a centered drain was the only way to go... I could give you other examples of a lack of understanding in general, but I'll spare you the details. They are good but only so far and not more. The pro's in their pro forum do not help newbies with non-Schluter or non-Kerdi things.

    Bookmark   November 5, 2009 at 10:30AM
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suschmoo2 I believe that there are some regulations that state you have to have a 2" barrier in case of flooding. I recently visited some friends and they solved this problem by building a bump and slopes on either side of the bump. That way you could wheel a wheelchair over the bump if you would every need to. If you do a search on this site you should be able to come up with some threads on this subject.

    Bookmark   November 6, 2009 at 3:09PM
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thanks davidro1, you are very helpful.

    Bookmark   November 6, 2009 at 4:48PM
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