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Thread: Dirt coming down from cement coping

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    eripaulie's Avatar
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    Dirt coming down from cement coping

    [attachment=0:14xkw1y5]downsized_0525122012.jpg[/attachment:14xkw1y5][attachment=0:14xkw1y5]downsized_0525122012.jpg[/attachment:14xkw1y5]Hello everyone,

    Member here for a couple of years, sparkling pool due to BBB Method. Today while scrubbing waterline with a magic eraser noticed dirt coming out from under stamped concrete coping from top of pool. I kept wondering why I was seeing dirt on bottom of pool in shallow end. Wondering, should I caulk underneath the cement where cement meets fiberglass pool? If so, what kind of caulk shoud I use?
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    15,800 gallons
    Sta Rite Cristal Flo Hi Rate Sand Filter Model # T240BP-1
    Inground
    Fiberglass
    1 HP Sta Rite Dura Glass Pump
    Filter and Backwash Flow Rate 63
    Hayward 200000 BTU Heater

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    Re: Dirt coming down from cement coping

    Does the concrete overhang? If so, you might have to approach it a different way. Can you get up under it to take a pic?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    eripaulie's Avatar
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    Re: Dirt coming down from cement coping

    There is about an inch overhang. I think I have noticed ants in that area in the past also. Sorry the picture is sideways.
    Attached Images Attached Images
    15,800 gallons
    Sta Rite Cristal Flo Hi Rate Sand Filter Model # T240BP-1
    Inground
    Fiberglass
    1 HP Sta Rite Dura Glass Pump
    Filter and Backwash Flow Rate 63
    Hayward 200000 BTU Heater

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    Re: Dirt coming down from cement coping

    With the pic in it's current orientation, is that the pool wall on the left, the gap you are talking about in the center and then the overhang on the right?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    eripaulie's Avatar
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    Re: Dirt coming down from cement coping

    Yes, the white is the pool wall (bottom). The picture is sideways. The cement is gray on the right, stamped concrete deck, which has about an inch overhang all around the pool. Yes the gap is in center and is like that mainly around the whole pool. When water is splashed up onto the cement a lot of dirt comes out in that one area. I have seen a group of ants in that area must have been making a nest or whatever under the cement. They may still be under there but havent seen them lately congregated on the pool wall.
    15,800 gallons
    Sta Rite Cristal Flo Hi Rate Sand Filter Model # T240BP-1
    Inground
    Fiberglass
    1 HP Sta Rite Dura Glass Pump
    Filter and Backwash Flow Rate 63
    Hayward 200000 BTU Heater

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    Re: Dirt coming down from cement coping

    I got it. I had a VERY similar situation. With the water level lowered so I could work, I got in the pool and first cleaned out that gap with a stiff brush, getting as much dirt out as possible. Then let it dry thoroughly....very important.

    Next, simply force a bead of polyurethane caulk up into that crack with a little "overflow". I then wiped down the overflow with my finger to form a nice, clean rounded seal and then let it set up and filled the pool back.

    It is important to use polyurethane and not acrylic. It's messy and won't clean up with water but will give you a nice flexible, fairly permanent seal.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    eripaulie's Avatar
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    Re: Dirt coming down from cement coping

    Ok. Thanks Dave. Will get the polyurethane caulk and try it.
    15,800 gallons
    Sta Rite Cristal Flo Hi Rate Sand Filter Model # T240BP-1
    Inground
    Fiberglass
    1 HP Sta Rite Dura Glass Pump
    Filter and Backwash Flow Rate 63
    Hayward 200000 BTU Heater

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