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Thread: What specific type of extruded polystyrene rigid foam insulation under the pool?

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    K9 Protected's Avatar
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    Cool What specific type of extruded polystyrene rigid foam insulation under the pool?

    Just wondering if someone can advise me as to which type and thickness of extruded polystyrene rigid foam insulation to get to install underneath an Intex Ultra Frame 16 x 32 that will hopefully go up in 2-3 weeks? Thanks so much.
    Trying to get the least expensive alternative for my dogs to swim THIS summer so due to lack of pool installers willing to prepare the site, the pups will get an 18' x 42" Easy Set pool to tie them over this late in the season. Hopefully with some dremel action on their nails, we MAY not pop the ring too fast!

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    FunFinder's Avatar
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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    Hi there! I love that you are building a pool for your dogs. I have a boxer that would love to swim with us, but I haven't tackled the issue of dog entry and exit. As for the insulation, if you search for the thread "AGP Padding" you will find some answers. Sorry, I don't know how to add a link to it here.
    Intex Ultra 9'x18' AG, 2800 Gph .75hp pump, 77# sand filter, Intex ECO SWG, Hayward wide mouth skimmer, KK Lil Shark vacuum, Intex magnetic light, TF-100 w/ SpeedStir

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    K9 Protected's Avatar
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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    Thank you! I will try that!! I have seen people mention it before and think I saved the screenshot and can look for it too.
    Trying to get the least expensive alternative for my dogs to swim THIS summer so due to lack of pool installers willing to prepare the site, the pups will get an 18' x 42" Easy Set pool to tie them over this late in the season. Hopefully with some dremel action on their nails, we MAY not pop the ring too fast!

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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    I used 1 inch thick tongue in grove foam board (link below). It was pricey, but well worth it. You can probably get away with 1/2 inch, but I went with one inch because my pool is 5 foot and I didn't want it to compress. And it didn't. Trust me, this foam is strong, and smooth.

    Owens Corning FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing-68WD - The Home Depot

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    K9 Protected's Avatar
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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    Thanks so much, durtynacho!!
    Trying to get the least expensive alternative for my dogs to swim THIS summer so due to lack of pool installers willing to prepare the site, the pups will get an 18' x 42" Easy Set pool to tie them over this late in the season. Hopefully with some dremel action on their nails, we MAY not pop the ring too fast!

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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    I used the 1/2" extruded polystyrene 4'x9' sheets from Home depot. I thought it would be to skinny but it works great. I did also put an old nylon carpet under the foam. People said it would really smell with the water splashing all the time. Considering it came from a house where dogs peed all over old carpet ( I left it out side all winter) it worked. My 1 yr old lab pup goes in the pool sometimes on here own. She can't touch the bottom but the foam feels really nice. I tried to be super carefully to not dent the foam while taping it down and then my little herd of goats paraded across it leaving little hoof marks. Oh well I can't feel any dents. It was super hard pulling the liner over the foam, not sure why but it was like the liner suctioned it to the foam.

    I got my pool used so it came with used stairs and it makes it easy for the pup to get in the pool but the pup uses the ladder to get out.

    Here is a photo of the foam. There are patio blocks under which where hard to find. I did not use any plastic tarp. This took 1 very large roll of Gorrilla 11698577_10200606342318467_1347509986208023119_n_zpsjoohaefh .jpg Photo by Teresa_Lundquist | Photobucket

    I went with foam thinking it was too hard to haul the sand in a wheelbarrow? Not. It was a hard thing for me to use foam BUT the foam will never wash away when we have gulley washer downpours.
    Used pool 1995 Lomart 18'x48" just installed 7/16/2015, Hayward Power Flo Matrix 1 HP 2 speed pump, 16" Rx Clear Radiant sand filter ( used pea gravel and zeolite) foam wall, polystyrene bottom, liner 25 gauge overlap, TF-100 test kit. Son training for 2018 Paralympics, Hoping for solar heater of some sort. Good chance Labrador will be in pool. Colorado Prairie, 6000 ft elevation high mountain desert, clay soil

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    K9 Protected's Avatar
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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    Thank you, Tere!!

    I'm assuming I must remove the sod first, then level with sand, then add the foam? Would I still need to use a tarp too?
    Trying to get the least expensive alternative for my dogs to swim THIS summer so due to lack of pool installers willing to prepare the site, the pups will get an 18' x 42" Easy Set pool to tie them over this late in the season. Hopefully with some dremel action on their nails, we MAY not pop the ring too fast!

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    Re: What specific type of extruded polystyrene rigid foam insulation under the pool?

    I bought and installed that same pool.. it is big.. New above ground oval 18x33 install - Page 2

    I used 12 tons of 1 inch crusher run rock first, then 5 tons sand (post #75), then I used 3/4 inch tongue and groove from lowes and taped them together with 3.75 inch gorilla tape, so far I have no gaps at all in the bottom. (post #93) I did not use the tarp.

    I probably went way over board with leveling the pool but its within 1/2 inch level on all sides
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
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