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Thread: I envy you folks with lawns to build on (new build on gravel)

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    treehouse pool's Avatar
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    I envy you folks with lawns to build on (new build on gravel)

    Wife and I decided to set up an above ground in order to teach the kids how to swim this summer. the place that would be ideal is technically our front yard and the 18' round intek we bought would almost cover the grass completely. So we are using a section of what we previously used as parking.....a large gravel area. Had a 6" slope across the 20' area we decided on.

    I have boxed in the low side with 6" timbers that end about halfway back up the grade, next will be a gravel base about 4" deep...a mix of VA red clay and sand ontop of that..going to rent a tamper...pavers for the feet and filter...., and then we get to my question.....

    I bought 11 sheets of 3/4 pink foam....I have seen alot of folks using 2" foam....is my 3/4" thick enough?

    will post pics soon.

    Thanks

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    treehouse pool's Avatar
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    Re: I envy you folks with lawns to build on (new build on gravel)

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    Re: I envy you folks with lawns to build on (new build on gravel)

    By gravel base, do you mean crushed rock. The stuff with the fines and powder in it. That makes the best base, it is compactable and very stable. Personally if you are going with compactable base and foam, I would skip the sand, or go with a minimal amount to final level. I find it to be a pain to maintain. When uncovered it blows and washes around. I ended up removing as much of my sand as I could down to my compacted base and putting my foam directly over that.

    I used 1" foam board. I think 3/4" would be just fine. 2" is definitely overkill. I would use gorilla duct tape on the joints.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    Your on the right track, the 3/4 will be fine, but I think also with the gravel under it, you want to consider a Gorilla pad under the pool to prevent the stones from working up through the foam etc. May be a bit overkill, but worth it I think in the long run.

    http://www.amazon.com/Splash-Net-Exp.../dp/B004SPR66Y

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    Re: I envy you folks with lawns to build on (new build on gravel)

    I grabbed 2 rolls of gorilla tape when I bought the foam.
    Actually what we have is more like parking lot gravel, the sand I'm talking about is actually from a creek on the property and is more of a mix of red clay sediment and sand, I hope that after compacting it the result will be pretty solid.

    Thanks for the info about the sand blowing around, I hadn't thought of that. Might not be a big factor for me because I am hoping to leave pool up year round like others I have seen in our area.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    This site has been awesome for me to get info from, makes me feel much better about tackling this project.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    I'm using 3/4 and it is perfect for me. My surface is smooth to start with tho, so that may make a difference but pro ably not.

    Good luck! You're on the right site for the job at hand.
    Intex UltraFrame 14'x48in - 3,900 gallons. Intex 1600 GPH combo Sand Filter/SWG Hard Plumbed w/Hayward skimmer, suction & return. Borates.
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    Re: I envy you folks with lawns to build on (new build on gravel)

    I used 1/4" but that's on flat sand base. It's perfectly comfortable/flat.
    Intex 12'x24'x52"
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    Re: I envy you folks with lawns to build on (new build on gravel)

    I am in the same boat, but in my case I have to have the aggregate brought in. I am going with limestone, but any sort of stable gravel (ie, gravel with sharp edges vs rounded stones) will be fine for a base.

    I am going with 1.5" foam sheets for my setup. I would be concerned with 3/4", more having to do with the aforementioned rocks working their way through it.

    Here is a "quick fix" for that, put down weed barrier first before the foam. It will make sure nothing grows through (if you have nutgrass I would still use a kill/preventer for it) and it will make sure the rocks don't cause an issue with the foam.

    For our setup I am taking off the topsoil used to fill-in the previous in-ground pool, putting down weed barrier, then 1/4" limestone and dust (4"-6" worth, compacting every 2"), then foam wall, foam for the floor and foam cove.

    Pavers are overkill if you are using a vibratory plate compactor and wetting the area while compacting. If you can get that level, the pavers are not needed since the gravel will have no ability to "move" since it is interlocked with pressure on it. Go ahead and use pavers if you want, but I am skipping that part after talking to a few engineers on the subject. Even the Aqualeader instructions omit the pavers if you use a gravel base, and all of their pools are all resin.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    I used 3/4" foam on top of compacted crusher run and it works perfectly. As long as the base is dampened and compacted properly I highly doubt any of the stone is going to protrude through the foam.
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    Re: I envy you folks with lawns to build on (new build on gravel)

    Heck we used 1/2 inch with 2 gorilla pads 1 below and 1 on top of foam, it was extra we didn't want to send back

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    Re: I envy you folks with lawns to build on (new build on gravel)

    got 2" of water in the Pool!!!!

    found out the pool needed to be moved about 6 " because one of the pavers is under the liner and I can feel the corners of it as I am working out the wrinkles.....
    This project never ends.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    Quote Originally Posted by treehouse pool View Post
    I grabbed 2 rolls of gorilla tape when I bought the foam.
    How many more trips did you make for more rolls of gorilla tape? I triple seamed the tape and bought 2 rolls. Went back for 2 more, then again. Finally, couldn't afford the gorilla tape any more as I was running out of money so bought 2 rolls of regular heavy duty duct tape. I don't remember now how many rolls I went through, but it was a LOT more than 2 rolls.


    Thanks for the info about the sand blowing around, I hadn't thought of that. Might not be a big factor for me because I am hoping to leave pool up year round like others I have seen in our area.
    Don't know where Lynchburg is, but here in midwestern PA, my pool has done fine for 2 winters with some -30 nights tossed in this past winter. I drain down to the skimmer hole and let it sit. It freezes probably about 10 inches thick at least.
    Mike

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    Re: I envy you folks with lawns to build on (new build on gravel)

    bought two more and did the triple seam thing.....actually wish I would have done more now, it feels good but a part of my foam shifted during set up.

    Anyone have an opinion on the fact that my feet are on my tarps....so I have tamped base, paver, expensive tarp, cheap tarp that came with the pool.....and the foot is sitting on the top.
    My foam is coped around the pavers and is sandwiched between the tarps.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    First dip earlier!! Wooooooo!

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    Re: I envy you folks with lawns to build on (new build on gravel)

    Good for you! Now, its time to enjoy the rewards of the hard work.
    Ultra 16', Intex Sand filter/pump combo, 8' x 20' solar panels, solar blanket w/roll tube, 1" extruded foam floor with Gorilla pad, Liquid chlorine and stabilizer.

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    Re: I envy you folks with lawns to build on (new build on gravel)

    I'd bet you my bikini you'll never get TFP water from a pool store!

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