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Thread: Hollow place behind marcite

  1. Back To Top    #1

    Join Date
    Mar 2011
    Location
    Sunny Central Florida
    Posts
    91

    Hollow place behind marcite

    I have a crack in my marcite (I think it's marcite, LOL) and when I tap on the crack, it sounds hollow. Speculation on why/how it got hollow behind the marcite?



    From the side...you can see the wall is bowed out a little....



    I've been letting the water level drop b/c I'm leaking .75-1" a day and I was trying to find it. Just noticed the crack (it's in an X shape) today.

    Opinions?
    IG Plaster 20,000gal, attached spa w/ spillover, hayward C12002 cart filter, 1 1/2hp pump w/ polaris 360
    6/16/12 - PH 7.6, FC 6, CC 0, CYA 30, TA 80, Calcium 310

  2. Back To Top    #2

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: Hollow place behind marcite

    Your finish appears to be SGM Diamond Brite, Super Blue if I'm not mistaken.

    The hollow you hear is a blister caused by that spot being extremely smooth and the plaster being a little old at application. It didn't bind well. Doesn't happen a lot. It's called delamination. Contact the builder. If the job is recent, I doubt there will be any issues with getting it corrected.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  3. Back To Top    #3

    Join Date
    Mar 2011
    Location
    Sunny Central Florida
    Posts
    91

    Re: Hollow place behind marcite

    Not recent......REALLY old pool. We've been here 7 yrs now, and the pool was built way before that. Is it something I need to worry about? Could it cause the water loss/leak?
    IG Plaster 20,000gal, attached spa w/ spillover, hayward C12002 cart filter, 1 1/2hp pump w/ polaris 360
    6/16/12 - PH 7.6, FC 6, CC 0, CYA 30, TA 80, Calcium 310

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