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    Oprey's Avatar
    Oprey Posts: 1, Reputation: 1
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    #1

    Dec 15, 2018, 08:00 AM
    Moisture tile grout line
    Why would there be darker spots in grout lines? I think there is moisture coming up .
    talaniman's Avatar
    talaniman Posts: 54,327, Reputation: 10855
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    #2

    Dec 15, 2018, 01:56 PM
    Or it could be mold, mildew, dirt, or grime. Try cleaning it and see.

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