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Thread: Grout Gone Bad!

  1. #1
    Join Date
    Mar 2009

    Exclamation Grout Gone Bad!

    My husband installed a new shower with beautiful river rock and a dark grey grout. After a couple of months, the grout developed this ugly white film that will not come off no matter what chemical I try (see picture below). Any clue what caused this? Is there any remedy short of pulling out the grout and starting over?


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    Last edited by cdewing; 03-02-2009 at 09:18 AM.

  2. #2
    Join Date
    Jan 2009
    Needham, MA

    Default Re: Grout Gone Bad!

    a guess, and only a guess, would be that it's efforflesence (i doubt i spelled that correctly) which is the lime that bleeds out of cement when it's gets saturated, it can often be found on foundation walls, sort of looks like a white powdery substance when it's dry. what was used for the shower base under the tile?

  3. #3
    Join Date
    Mar 2009

    Default Re: Grout Gone Bad!

    Cement was used to create the shower floor. Sounds like I have a mess on my hands. Is there anything I can do to fix it or do we have to rip the floor out and start over.\

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