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Thread: Cracked grout leads to small leak

  1. Back To Top    #1

    Join Date
    Jul 2012
    Location
    Austin, TX
    Posts
    75

    Cracked grout leads to small leak

    I have some small hairline cracks in the tile grout lines which lead to dampen the coping stones. Some people recommended eproxy grout but it is not really recommended by the manufacturer (mapei).

    I put some clear silicone caulk at the corners and it seems to help some. Just wonder what you use to waterproof the grout. Or is it common to leave it untreated? Thanks

    Scott

    Lazy-L shaped pool and a spa. 22.5k gallons. Pentair VS pump. Pentair cartridge filter CCP520. STA-Rite SR400NA heater (400K BTU). Leuder limestone coping. Pebble sheen (blue granite) Wooden deck.

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Cracked grout leads to small leak

    If the correct grout was used it should have been waterproof, so grout is not normally waterproofed.

    They make silicone grout, but using that would require removing the old grout.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Jul 2012
    Location
    Austin, TX
    Posts
    75

    Re: Cracked grout leads to small leak

    The tile guy used mapei Keracolor S cement-based grout, which is suitable for swimming pool application.

    Lazy-L shaped pool and a spa. 22.5k gallons. Pentair VS pump. Pentair cartridge filter CCP520. STA-Rite SR400NA heater (400K BTU). Leuder limestone coping. Pebble sheen (blue granite) Wooden deck.

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