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-   -   Tile on Floor (http://www.houserepairtalk.com/f13/tile-floor-14428/)

CallMeVilla 07-19-2012 03:49 PM

Tile on Floor
 
How soon after I lay concrete can I lay tile?

nealtw 07-19-2012 04:39 PM

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.

TerryDM 07-20-2012 08:22 PM

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.

tilemandan 07-20-2012 08:27 PM

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....)

samfloor 07-20-2012 09:11 PM

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.

CallMeVilla 07-21-2012 05:42 PM

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 . . .

samfloor 07-21-2012 07:43 PM

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.

isola96 07-22-2012 06:57 AM

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.

samfloor 07-22-2012 09:01 AM

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.

samfloor 07-22-2012 09:04 AM

Quote:

Originally Posted by isola96 (Post 75323)
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.

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.


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