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Unread 06-06-2021, 05:15 PM   #1
ram367
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Question - Rain soaking thin set for a week

I'm having an exterior concrete slab (22'x30' patio) covered with porcelain tile. The installer did half one day and the other half the next day (last Tuesday). Was supposed to come back the next day and grout. But it rained Tuesday night and every day since then. I tried blowing the water out of the joints to dry it but that's about impossible with all the crazy channels under the tile. We haven't had any sun to dry it out and it's supposed to rain every day through the end of this week. I'm in Alabama by the way. Bottom line, the thin-set will be drenched and submerged for at least 10 days straight before there is any chance to dry out.

Should I be concerned about any issues that can develop from this?
And how long should they wait before attempting to grout?

Oh, the installer was going to put some sort of a drain? underlayment under the tile but it's not available because of covid delays. So proceeded without it.

Thanks for any help you can give me
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Unread 06-06-2021, 05:28 PM   #2
ram367
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also forgot to add it's not draining because the concrete guy didn't slope the slab properly. Has a bunch of low spots that puddle water.
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Unread 06-06-2021, 08:14 PM   #3
Tool Guy - Kg
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Welcome to the forum, David.

I’ve had a mortar rep tell me that if the mortar gets wet too soon, that one of the negative effects is persistent efflorescence.

So, for the second half of the tile, the thinset mortar was essentially submerged just a few short hours after the tile was set?

Specifically which mortar was used?

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Unread 06-07-2021, 07:20 AM   #4
ram367
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The last half of the tile was laid on Tuesday, finished up about 6:30 pm. Rain overnight, started probably 6-7 hours after the last tile laid.

Today is Monday and the joints are still filled with water. So where I'm coming from is it's stayed wet for 6 days straight now and based on the forecast probably another 5 days or so until we can get a day without rain. Seems like it would take 2-3 days without rain for it to dry out.
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Unread 06-07-2021, 09:44 AM   #5
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Quote:
Originally Posted by Goldstein, Post #3
Specifically which mortar was used?
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Unread 06-07-2021, 09:56 AM   #6
Dave Gobis
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Fairly high likelyhood there will be a bondng issue. You also shouldn't have a bunch of visible grooves under the tile if it has a required 95% coverage.
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Unread 06-08-2021, 07:52 AM   #7
ram367
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mortar/thin set is.........Laticrete 253 Gold
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Last edited by ram367; 06-08-2021 at 08:40 AM. Reason: got name of product
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