Concrete Slab...Need To Tile Over It

Tommy C

I asked this question on the Flooring Forum...no answers yet

Went on an estimate yesterday...homeowner wants 6" x 6" quarry tile in a basement entryway. This would be over the concrete slab.

The slab is not level...I would say it might even be an inch or so off in some spots.

There are also some minor cracks in the slab, and they sometimes get moisture coming up through the slab.

This is what I'm thinking:

1) Use self leveling material to level off the slab floor (any recommendations on a self leveling product?)

2) Using thinset, apply a Ditra membrane (or something similar, any recommendation?) which would be a waterproofer, and achieve crack isolation. Will the Ditra provide crack isolation?

3) Thinset the tile directly over the Ditra membrane.

Does this sound about right? Anything that you guys would do differently??

I appreciate any insight!

-TC

trav007

I've been checking this out myself.....so far I have found that the Ditra "should" do the job you want it to. Also, if the floor has been around for awhile and is relatively stable you could probably bond directly to your leveler and just isolate the cracked area but I've not tried this method yet. It requires that no thinset is placed under the crack isolater (which in this case could be a strip of sheathing paper). I think this would lead to other problems in the future. I think your first instinct is good. ( as long as you can still get the door open after you build it all up )

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Cole

Please no double posts. One thread will get you plenty of responses, you just might have to give it a day or two.

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tkle

Floor leveling mixes aren't good for more than 1/4". Use dry pack.

natural1

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