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Old 12-12-2008, 02:21 PM   #1
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Tiling over new concrete


We had a new concrete slab poured in January of 2008 (15'x 30'). Slab is 4" thick over a moisture barrier, no in slab radiant heat, no control joints and at grade level. There is also a man door to the outside. Plan to install ceramic tile in Feb.

The slab is flat and does not have any cracks. Can I just use modified thinset between the ceramic (12x 12 or 13x 13) tiles and the slab or do I need a membrane?

Thank you

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Old 12-12-2008, 02:42 PM   #2
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Tiling over new concrete


Modified thinset should be fine as long as the temerature doesn't drop below 55 degrees during the process and for several days afterward.

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Old 12-12-2008, 02:49 PM   #3
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Tiling over new concrete


Bud,

Thanks for the answer, one more question, is the 55 air temp or slab temp?

Mike
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