Tile on Floor

Discussion in 'Flooring' started by CallMeVilla, Jul 19, 2012.

  1. Jul 19, 2012 #1

    CallMeVilla

    CallMeVilla

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    How soon after I lay concrete can I lay tile?
     
  2. Jul 19, 2012 #2

    nealtw

    nealtw

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    I was told to lay a peice of poly on the floor and 24 hrs later, if there is moisture under it the floor is still to wet.
     
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  3. Jul 21, 2012 #3

    TerryDM

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    I've heard anywhere from 24 hours to 28 days. I guess if I was going it, I'd wait the 28 days to be sure there was no question.
     
    Last edited: Jul 21, 2012
  4. Jul 21, 2012 #4

    tilemandan

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    You can do the test as Neal stated, duct tape a piece of visqueen to the floor and see if any condensation appears. Or for about $20 you can get a calcium chloride test from a local flooring supplier . It is a fairly simple process, just follow the directions included with the test.
    Tile is very forgiving when it comes to moisture, here in Florida we do a lot of tile work on very new slabs, as early as 28 days! Remember to get an accurate moisture reading it must be done in a controlled environment ( ac running, home dried in etc....)
     
  5. Jul 21, 2012 #5

    samfloor

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    The standard for concrete drying is 28 days per inch. Therefore a 4" slab should dry a minimum of 112 days. No one follows this but they should. Don't know about tile, but for other floor coverings, any sooner would void the warranty. I have been installing and teaching installations (everything but ceramic) for 40 years.
     
  6. Jul 22, 2012 #6

    CallMeVilla

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    Not that I doubt you, Sam, but have you never mud-floated a shower wall and then tiled in less than 28 DAYS????? That would mean over three months just to tile a bathroom floor . . . not gonna happen.

    Help me understand this in the field . . .
     
  7. Jul 22, 2012 #7

    samfloor

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    I said no one does it, but that is the standards for other floor coverings.
    http://www.cement.org/tech/cct_drying.asp
    This isn;t the one I usually use but it lists pretty much the same amount of time. It says a month per inch.
     
    Last edited: Jul 22, 2012
  8. Jul 22, 2012 #8

    isola96

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    That time span does seam a little excessive, but we are taking about indoors not out side so I can understand it taking longer but not that long.
     
  9. Jul 22, 2012 #9

    samfloor

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    I said, no one follows it. Look at carpet, for example. The mills say that carpet should be rolled out in the customers house 24-48 hours before installation, that's not gonna happen either.
     
  10. Jul 22, 2012 #10

    samfloor

    samfloor

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    Try moisture testing and sticking to the manufacturers requirements. On most concrete floors, 4 months isn't long enough. It's their out. If it fails, you didn't follow their requirements, so no warranty.
     
  11. Aug 27, 2012 #11

    CallMeVilla

    CallMeVilla

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    Just to close out this thread . . . I did the plastic sheet test every day until I got no condensation under the plastic in the morning. It took 8 days.
     

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