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Thread: Something bad is happening to my pool . . .

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    Something bad is happening to my pool . . .

    A couple years ago I noticed a stain in my pool. I tried the typical things to remove it, brushing, chlorine, etc. I finally decided that a piece of asphalt shingle had blown into the pool and had dissolved while I was away and it was stained with tar and moved on.

    Since then it has gotten worse and now I know it is not a stain, but something more dreadful is happening. The dark area is now an area that ~1/4 inch deep pitted area. When I brush it clouds of what look like rust are removed. I've looked at it closely underwater and it is just a really dark pitted mess.

    This year I got a second one a couple feet away from the original one. I'm now wondering if somehow the water has penetrated the concrete and is rusting out the rebar, causing the area to flake away and become pitted? I really don't know and am hoping that someone here may have a better idea. I've attached a picture to help.

    thanks,
    david
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    15,500 gal, inground gunite pool with 7 ft spa, 2 speed pump 2hp/.33hp, 3/4 hp booster pump, Intermatic P1353 timer, AutoPilot SC-48, Sand filter with ZeoBest, Heater, that I never use . . .

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    Mod Squad jblizzle's Avatar
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    Re: Something bad is happening to my pool . . .

    I had a few spots similar, although not as bad, where the rebar had become exposed to water.

    If you get a new plaster job, they should grind the rebar back and cover it with the new plaster and it should not become a problem again.
    Jason, TFP Moderator
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    Re: Something bad is happening to my pool . . .

    So what is involved in a re-plaster job? Maybe I can get educated before calling out contractors.

    david

    Quote Originally Posted by jblizzle View Post
    I had a few spots similar, although not as bad, where the rebar had become exposed to water.

    If you get a new plaster job, they should grind the rebar back and cover it with the new plaster and it should not become a problem again.
    15,500 gal, inground gunite pool with 7 ft spa, 2 speed pump 2hp/.33hp, 3/4 hp booster pump, Intermatic P1353 timer, AutoPilot SC-48, Sand filter with ZeoBest, Heater, that I never use . . .

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    Mod Squad jblizzle's Avatar
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    Re: Something bad is happening to my pool . . .

    Well the short of it is: remove the old plaster and put on the new plaster

    Different companies seem to do things differently. For mine, all the old was jack-hammered out down to the gunite, ground down any rebar, and then installed the new finish. I would not want new plaster installed on top of old.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Something bad is happening to my pool . . .

    Yes, Rebar bleed.
    Shotcrete/Gunite is not water proof. The plaster is the waterproofing.
    Yours has eroded away to where it is allowing water to soak into the shell, thus causing the rebar to rust.
    Time to Re-plaster.

    If we just spent the money for Stainless steel rebar, this wouldn't happen

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    Re: Something bad is happening to my pool . . .

    Yikes, I have something similar, but it's black, not rust color. I suppose it's got to be the same problem. It's only in two spots (close together) and my plaster will be four years old in early December.
    9,200 gal. Gunite Luna Quartz French Grey pool with spill over spa, two fountains on tanning ledge (rarely used)
    Pentair Whisperflo 2HP, Pentair CCP Cartridge 420 Sq. Ft., Polaris 280 with booster pump
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    Re: Something bad is happening to my pool . . .

    OK I've had two companies come out and take a look. They confirm it is either rebar or rebar ties that are rusting.

    One recommends cutting into gunite, epoxy coating the rebar, plaster.

    The other recommends cutting into gunite, cut out rebar, fill with hydrolic cement, plaster.

    Both seem fine to me, just a little different bids ~$1500 for repair.

    Both recommend replaster since the plaster is 15 years old, the cost for replaster an repair is ~$6000.

    Comments?
    15,500 gal, inground gunite pool with 7 ft spa, 2 speed pump 2hp/.33hp, 3/4 hp booster pump, Intermatic P1353 timer, AutoPilot SC-48, Sand filter with ZeoBest, Heater, that I never use . . .

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    Re: Something bad is happening to my pool . . .

    Price sounds right to me.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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