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Thread: DIY gunite?

  1. #1
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    DIY gunite?

    Anyone done this? LOL. I'm not in a big city with lots of equipment and options available to me. Is there anything besides gunite that tile can go over for an all tile pool? Anything that can be done with regular or otherwise other mix of concrete? (we don't have a local pool company that does gunite) We afre not afraid to tackle bigger projects, providing we can get the right equipment.

    Thanks!

    Tikki
    15,300 gal., AG, sand filter, 1HP 2 speed pump, 40 GPM.

  2. #2
    Administrator JasonLion's Avatar
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    Re: DIY gunite?

    Applying gunite requires specialized equipment and a substantial amount of skill.

    It is quite possible to use standard poured concrete with forms, and then tile that.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  3. #3
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    Re: DIY gunite?

    Thanks, Jason. How would the rebar compare between concrete and gunite? Anything special to the prepare or add to the concrete, and then how thick would it go, do you know??

    Tikki
    15,300 gal., AG, sand filter, 1HP 2 speed pump, 40 GPM.

  4. #4
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    Re: DIY gunite?

    Tikki,

    Rebar is rebar...it is just reinforcing the concrete/gunite. The spacing and size of the rebar is specified by a licenced structural engineer who takes into account things like soil condition, proximity of structures and size/depth of pool.

    You can see pictures of my rebar prior to gunite by clicking on the link in my signature. If you look closely, the spacing of the rebar changes in different locations around the pool.

    Kevin
    25000 Gals, Intellichlor IC40 SWG , Intelliflo 4X160, Pentair Cartridge Filter, Easy Touch 8, Polaris 280

    My adventure: my-new-pool-build-t4534.html

  5. #5
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    Re: DIY gunite?

    Quote Originally Posted by cobra46
    Tikki,

    Rebar is rebar...it is just reinforcing the concrete/gunite. The spacing and size of the rebar is specified by a licenced structural engineer who takes into account things like soil condition, proximity of structures and size/depth of pool.

    You can see pictures of my rebar prior to gunite by clicking on the link in my signature. If you look closely, the spacing of the rebar changes in different locations around the pool.

    Kevin
    Right. *nods* But, concrete is not the same as gunite (nor shotcrete) and we would want to be sure that structurally it's going to be sound. Has anyone used the fiberglass infused concrete?

    Why is it that gunite/shotcrete is used for this application (pools) in general instead of concrete? Is it cost? Is it composition? Is is because of the plaster or other sprayed/rolled on finishing coat? We see fancy fountains all over the place that look like they are just regular concrete with tile over it, so it makes me wonder.

    Thanks for the pics, too!

    Tikki
    15,300 gal., AG, sand filter, 1HP 2 speed pump, 40 GPM.

  6. #6
    Administrator JasonLion's Avatar
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    Re: DIY gunite?

    Gunite is popular because it is very easy to form into complex shapes. Free form pools are all the rage these days. It would be a nightmare making a free form pool using forms.

    The strength of the final concrete has far more to do with the exact mix of ingredients used, than with the application method. Any competent structural engineer will be able to specify all the required details for a standard pour using forms just as easily as for a gunite or shotcrete pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    TFP Admin. Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. #7
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    Re: DIY gunite?

    Quote Originally Posted by JasonLion
    Gunite is popular because it is very easy to form into complex shapes. Free form pools are all the rage these days. It would be a nightmare making a free form pool using forms.

    The strength of the final concrete has far more to do with the exact mix of ingredients used, than with the application method. Any competent structural engineer will be able to specify all the required details for a standard pour using forms just as easily as for a gunite or shotcrete pool.

    Ahhh, that's what I thought. We aren't looking for form- we figure if you are digging the hole, you might as well fill it as much as you can. Then I guess we can pass this one on to the engineers and not worry about the rest of it. Thanks SO much!

    Tikki
    15,300 gal., AG, sand filter, 1HP 2 speed pump, 40 GPM.

  8. #8
    Senior Member stever's Avatar
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    Re: DIY gunite?

    Shotcrete/gunnite is typically a fairly dry concrete mix shot out of a jet -- the lower the water/cement ratio (don't get me started with people calling concrete 'cement') typically the stronger the concrete and less shrinkage. So in a sense concrete is always used -- but shotcrete is usually 4000-5000 psi while concrete is more typically 3000 psi (though you can order 5000 psi if you'e like).

    As was mentioned, shotcrete/gunnite is used because it is rather stiff (low slump) and can be spraked on vertical walls without falling.

    You cannot do shotcrete/gunnite yourself. As mentioned a formed concrete or CMU blocks can be used.

    Steve, S.E.
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