Shower Grout Problem


I regrouted the floor of my shower, and I think there's a problem. The grout turns gray when wet, then white again when it dries (the old grout on the walls doesn't change color when wet). I used an unsanded white grout (Mapei), and sealed it too. Any ideas? Thanks.
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Ross Payne



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Not a tile wiz but had the same issue once. If it's changing color it's getting wet. It's not being sealed. Try a different sealer.
Floor grout should be sanded grout BTW.
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Thanks, Al. I did not know that the grout on the shower floor needed to be the sanded variety. Everything I read always said to use unsanded grout for the shower. Do you think it is worth the effort to regrout the floor for that reason?
Ross

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As mentioned, not a tile wiz. Just an isolated experience here and there.

Go with what you read if you feel it's a reliable source. Possibly what I heard/read was only in regard to non-shower stall tile floors.
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