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Thread: Cracks in a new shotcrete pool

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    Cracks in a new shotcrete pool

    Hey All -

    So the shotcrete went into our pool on Tuesday 5/29/2012. Within a few hours of them finishing, I noticed some hairline cracks in the shotcrete. For the most part they are hairline cracks, but every now and then they thicken to where you could stick a pencil tip in there. Our climate is 100+ degrees every day, so we have been watering the shotcrete down religiously every 2-3 hours between the hours of 7:30 AM and 6:00 PM during the day. However, these cracks were there from the start. I am a little concerned because it seems like it has gotten longer to now it is close to 9 feet in length, although it hasn't noticeably widened. All of the cracks are on one side of the pool, on the bottom, where it is transitioning from 5 feet in depth to 4 feet in depth to the side wall (so there is some curve).

    Photos: https://plus.google.com/photos/11063523 ... 3326692065

    I have talked with both the Pool Builder (who has not come to look at the cracks) and the Shotcrete guy (who did see the cracks when he came to take his sprinkler back), and both of them are saying these cracks happen and that they are 'shrinkage' cracks. Pool Builder says they happen all the time in the summer and he has never seen them cause damage on one of the pools he built. Neither one recommends doing anything special to treat them. Even though the Pool Builder hasn't seen the cracks and gave his opinion that they are shrinkage cracks, he did agree to send the shotcrete guy on Monday to drill out the crack and re-apply a shotcrete mixture. That is scheduled to happen. I just want to do the right thing for the pool and make sure I am getting good information from the people that are working on it. If this process of drilling into the shotcrete to repair the crack is going to cause more damage than good, then I'd like to cancel that before it happens. Then again, I don't want to find out later this crack was deep and there is a leak or for the crack to expand and cause the Pebble Sheen finish to crack later....

    Help!

    Thanks!

  2. Back To Top    #2
    Melt In The Sun's Avatar
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    Re: Cracks in a new shotcrete pool

    While I'm not a concrete guy, I've seen a lot of pictures of pool builds on this site, and those don't look out of the ordinary to me. We'll see if some more people comment...

    Bear down!
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    Re: Cracks in a new shotcrete pool

    Bump....
    Just shrinkage cracks guys???? Call off the shotcrete guy coming back out to drill it out and patch it up??




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    Join Date
    Nov 2010
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    Calera, Al
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    271

    Re: Cracks in a new shotcrete pool

    Ours did not have any cracks in the shell. But, it was cool and rained for a few days after the shell was shot.
    17,000 gal, IG Gunite Diamond Brite plaster Kidneybean,w/7x11 tanning ledge& 3x5 swimout bench,244T 300lb Hayward Pro high rate sand filter(63 GPM) , Hayward 1Hp Super Pump w/3/4 hp booster pump, Polaris 280, Laars Lite 2 175k N/G Heater, Tf-100, Speed stir

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    Join Date
    Sep 2015
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    Phoenix, AZ
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    1

    Re: Cracks in a new shotcrete pool

    Did you ever get a resolution to this? I'm in Phoenix as well and my shotcrete was just blown in yesterday. I have identical looking cracks to yours in both width and length and have been watering it down several times per day as recommended. If you can, please let me know if your pool builder took any action or if it turned out ok after a few years without changes. Already a bit nervous about my pool builder given a few issues related to wall and gate construction already completed. Thanks!

    Quote Originally Posted by AZWldctFan View Post
    Hey All -

    So the shotcrete went into our pool on Tuesday 5/29/2012. Within a few hours of them finishing, I noticed some hairline cracks in the shotcrete. For the most part they are hairline cracks, but every now and then they thicken to where you could stick a pencil tip in there. Our climate is 100+ degrees every day, so we have been watering the shotcrete down religiously every 2-3 hours between the hours of 7:30 AM and 6:00 PM during the day. However, these cracks were there from the start. I am a little concerned because it seems like it has gotten longer to now it is close to 9 feet in length, although it hasn't noticeably widened. All of the cracks are on one side of the pool, on the bottom, where it is transitioning from 5 feet in depth to 4 feet in depth to the side wall (so there is some curve).

    Photos: https://plus.google.com/photos/11063523 ... 3326692065

    I have talked with both the Pool Builder (who has not come to look at the cracks) and the Shotcrete guy (who did see the cracks when he came to take his sprinkler back), and both of them are saying these cracks happen and that they are 'shrinkage' cracks. Pool Builder says they happen all the time in the summer and he has never seen them cause damage on one of the pools he built. Neither one recommends doing anything special to treat them. Even though the Pool Builder hasn't seen the cracks and gave his opinion that they are shrinkage cracks, he did agree to send the shotcrete guy on Monday to drill out the crack and re-apply a shotcrete mixture. That is scheduled to happen. I just want to do the right thing for the pool and make sure I am getting good information from the people that are working on it. If this process of drilling into the shotcrete to repair the crack is going to cause more damage than good, then I'd like to cancel that before it happens. Then again, I don't want to find out later this crack was deep and there is a leak or for the crack to expand and cause the Pebble Sheen finish to crack later....

    Help!

    Thanks!
    Quote Originally Posted by ROB N View Post
    Ours did not have any cracks in the shell. But, it was cool and rained for a few days after the shell was shot.

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