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Old 10-10-2018, 10:31 AM   #1
dann6332
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Sweating floor.

Ceramic floor over a parking structure. Wood structure, gypcrete underlayment. Floor suddenly started sweating. Floor is 100 percent wet with minor puddles, here and there. Should we wait until it dries out before grouting? Power grout is being used.
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Old 10-10-2018, 10:58 AM   #2
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Your area to be grouted will be assumed to be dry before grouting, Dan. A condition of SSD (Saturated, Surface Dry) is usually acceptable for application of cement-based products, but wet is not.

If in doubt, contact the product manufacturer.

My opinion; worth price charged.
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Old 10-10-2018, 04:24 PM   #3
jadnashua
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Gypcrete can take awhile to fully dry out. It gets a fair amount of water in the mix so that it flows well. It can take a bit of time for the excess to escape which becomes a lot harder if tile is installed over it before that happens.

How cold is it there now? Is the parking area insulated?
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Old 10-11-2018, 05:02 PM   #4
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I used to install gyp. Cure time was 28 days.
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Old 10-11-2018, 06:32 PM   #5
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I'd guess, you should probably call to be sure, that tiling over gypcrete is similar to a fresh concrete slab...don't do it before 28-days or, use Ditra, which is, I think, the only one that allows it as soon as it's safe to walk on. Not positive about gypcrete...thinset and gypsum can literally grow a new mineral and disrupt the bond if not done right.
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Old 10-11-2018, 07:08 PM   #6
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Sounds to me as though the floor is already tiled, guys, and he's asking only about grouting.
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