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Tiling over a slightly uneven concrete slab

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Tiling over a slightly uneven concrete slab rklotz 02-12-2007
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Posted by on February 12, 2007, 10:20 am


Im in the process of gutting a tiny half bath and Im about to tile the
floor. After pulling up the original flooring and cleaning it, I did a
quick dry layout of some of the tiles and noticed that a few spots in
the floor were not 100% level. At this point I put down 1/4 inch
backerboard to try an dlevel the floor. Unfortunately the problem is
still there. Can I get away with going a little heavy with the thinset
in the uneven areas? I know there are self leveling compounds, but I'd
like to avoid that if possible.


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Posted by JoeSpareBedroom on February 12, 2007, 10:37 am


> Im in the process of gutting a tiny half bath and Im about to tile the
> floor. After pulling up the original flooring and cleaning it, I did a
> quick dry layout of some of the tiles and noticed that a few spots in
> the floor were not 100% level. At this point I put down 1/4 inch
> backerboard to try an dlevel the floor. Unfortunately the problem is
> still there. Can I get away with going a little heavy with the thinset
> in the uneven areas? I know there are self leveling compounds, but I'd
> like to avoid that if possible.
>

Most of my ideas are either way too involved, or dead wrong. But, what if
you installed a temporary wooden frame around the edges, there the molding
would normally be, and pour in a thin layer of concrete, enough to level the
entire floor? Remove the frame, replace with molding.....


I dunno.....



Posted by on February 12, 2007, 11:58 am


>
>
> > Im in the process of gutting a tiny half bath and Im about to tile the
> > floor. After pulling up the original flooring and cleaning it, I did a
> > quick dry layout of some of the tiles and noticed that a few spots in
> > the floor were not 100% level. At this point I put down 1/4 inch
> > backerboard to try an dlevel the floor. Unfortunately the problem is
> > still there. Can I get away with going a little heavy with the thinset
> > in the uneven areas? I know there are self leveling compounds, but I'd
> > like to avoid that if possible.
>
> Most of my ideas are either way too involved, or dead wrong. But, what if
> you installed a temporary wooden frame around the edges, there the molding
> would normally be, and pour in a thin layer of concrete, enough to level the
> entire floor? Remove the frame, replace with molding.....
>
> I dunno.....

Thanks for the suggestion but I was hoping to avoid raising the floor
any higher. I already put in the cement board which added another 1/4
inch.


Posted by Banty on February 12, 2007, 12:20 pm


rklotz@gmail.com says...
>
>>
>>
>> > Im in the process of gutting a tiny half bath and Im about to tile the
>> > floor. After pulling up the original flooring and cleaning it, I did a
>> > quick dry layout of some of the tiles and noticed that a few spots in
>> > the floor were not 100% level. At this point I put down 1/4 inch
>> > backerboard to try an dlevel the floor. Unfortunately the problem is
>> > still there. Can I get away with going a little heavy with the thinset
>> > in the uneven areas? I know there are self leveling compounds, but I'd
>> > like to avoid that if possible.
>>
>> Most of my ideas are either way too involved, or dead wrong. But, what if
>> you installed a temporary wooden frame around the edges, there the molding
>> would normally be, and pour in a thin layer of concrete, enough to level the
>> entire floor? Remove the frame, replace with molding.....
>>
>> I dunno.....
>
>Thanks for the suggestion but I was hoping to avoid raising the floor
>any higher. I already put in the cement board which added another 1/4
>inch.
>


Sounds like an application for vinyl flooring. Works for uneven floors and
thinner, too, since you have a floor height concern. You can get some really
great remnants for your small space, some of the currently available flooring is
quite nice looking. I do love tile and have it everywhere reasonable for a NE
U.S. home (upstairs entryway, kitchen floor and backplash, bathroom floor and
walls). But downstairs where I have an uneven slab, I have tile-look vinyl in
two entryway areas. There are other looks if you don't like tile-look that
isn't actually tile.

Don't push tile too hard - it will crack if the floor isn't flat and stable
enough. At least in the grout lines.

Banty


Posted by EXT on February 12, 2007, 12:12 pm


The cement board should be set in Thinset, adjusting the thickness of the
Thinset mix to level the board. 1/4" board is a little thin if the floor is
not perfectly flat with enough firmness.

> Im in the process of gutting a tiny half bath and Im about to tile the
> floor. After pulling up the original flooring and cleaning it, I did a
> quick dry layout of some of the tiles and noticed that a few spots in
> the floor were not 100% level. At this point I put down 1/4 inch
> backerboard to try an dlevel the floor. Unfortunately the problem is
> still there. Can I get away with going a little heavy with the thinset
> in the uneven areas? I know there are self leveling compounds, but I'd
> like to avoid that if possible.
>



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