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Thread: Calcium coming out of my tile and bricks

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    In the Industry

    Join Date
    Dec 2015

    Calcium coming out of my tile and bricks

    I just got my tile and a back wall on my pool redone about 1 week ago and already I am seeing white calcum coming out of the tile and coming down the rock work that was just installed it is not the normal calcium from the water splashing up on the tile and leaving a calcium resadue it is coming from the rocks above the tile line and from out of the groute lines it looks like it is being pressed out from behind the tile and rock work what is causing this should i call me contractor that just did the job or should i call my pool guy it was just filled with water less than 2 weeks ago my pool guy told me all the chems all good. can any body help me

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    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: Calcium coming out of my tile and bricks

    It's called efflorescence. It comes from water trapped behind stone and brick permeating through the porous material and leaving behind minerals when the water evaporates. It can be cleaned off with a high quality stone cleaner (eg, Prosoco EnviroKlean). Your stone mason/installer should look at it.

    Going forward you need to figure out where the infiltrating water is coming from. Is there a leak somewhere or natural ground water behind this stone? If the source is temporary, then cleaning it once should do the trick. If the source is constantly there, then you need to fix it or mitigate it somehow and then seal the stone with a high quality stone sealer such as the products made by DuPont. Sealing will require regular reapplication as the sealant wears out. Typically every 18-24months so times longer.

    Your stone installer can best advise you.

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