"natural grey" grout turns white


Old 07-14-08, 09:02 PM
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"natural grey" grout turns white

The guy who set the terra cotta tile in my walkway (outside) did it on rainy days. Both days it rained on the grout (one of the days he was out there grouting in the rain). He said it would be just fine but now the grout is white. I think he either:
1) didn't know what he was doing - he told me several times how he took the tiling contractors test.
2)knew what he was doing (and that tiling in the rain was not the right thing to do) but was more interested in getting this job finished, getting paid and getting out in the shortest amount of time (come rain or come shine).

What is the correct procedure for grouting this kind of tile?
Is there any way to get the grout grey again?
What made the grout turn white?

Thanks so much for your advice and help.
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Old 07-15-08, 05:19 PM
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Tiling contractors test?

Grouting or tiling in the rain is a no-no.

The tile should have been presealed at least 2-3 times or until tile stops absorbing the sealer. Once that is done, you can apply your sanded grout. After the grout has set-up, you do a final sealing or two.

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