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Thread: Insulation underlayment for Intex

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    Join Date
    Apr 2013
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    Insulation underlayment for Intex

    I'm still waiting for a permit, so I'm fine-tuning and estimating the finishing touches for an Intex 18'x48" AGP. I'm pretty much sold on the insulation-underlayment concept but scared by the prices. Yikes! If I go with the pink stuff I'm leaning toward 3/4" T&G with a 25 p.s.i. for $12.28/4'x8' sheet at Menards. They also have a 1/2" fiberboard "weather resistant" product for $8.99. Is that even worth consideration?
    18'x4' AG Intex Ultra Frame, 6,700 gal., assembled new 2013; Mods: Hayward EC50C90 Perflex filter & 1 h.p. PowerFlo Matrix pump, Fiber Clear cellulose D.E. substitute, Hayward H100ID1 100,000 BTU NG heater, a pair of 2'x20' Sungrabber solar heaters via the original Intex 635T pump, grey Hydro Tools through-the-wall skimmer, Confer steps/ladder system & Cover Free chemical pool cover. The Summer of Mods!

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    linen's Avatar
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    Re: Insulation underlayment for Intex

    Extruded polystyrene is what you want (in your case the "pink stuff"). It can handle the conditions and has enough strength to minimize denting. I am not sure what the fiberboard you posted is...do you have a link?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Insulation underlayment for Intex

    I don't think you want any type of "fiberboard". That sounds like it will end up a soggy mess.
    Michael
    18ft. diameter, 48 inch deep Sharkline Reprieve AGP, 7000 gallons, Intex 14 inch sand filter with 3/4 H.P. 2,150 GPH pump, Intex SWG
    TF-100 test kit

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    Re: Insulation underlayment for Intex

    Quote Originally Posted by linen
    Extruded polystyrene is what you want (in your case the "pink stuff"). It can handle the conditions and has enough strength to minimize denting. I am not sure what the fiberboard you posted is...do you have a link?
    I couldn't find a link on Menards' or anybody else's website. I'm pretty much resigned to paying for the EPS. Trying to figure out how I'm going to justify it with The Boss
    18'x4' AG Intex Ultra Frame, 6,700 gal., assembled new 2013; Mods: Hayward EC50C90 Perflex filter & 1 h.p. PowerFlo Matrix pump, Fiber Clear cellulose D.E. substitute, Hayward H100ID1 100,000 BTU NG heater, a pair of 2'x20' Sungrabber solar heaters via the original Intex 635T pump, grey Hydro Tools through-the-wall skimmer, Confer steps/ladder system & Cover Free chemical pool cover. The Summer of Mods!

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    joshuaberman's Avatar
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    May 2013
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    Harker Heights, Texas
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    Re: Insulation underlayment for Intex

    Will it stop nut grass?
    22'x52" Intex 10,472 gal. w/ 2650 Sand Filter, using Taylor K2006 Kit. BBB

    My Build: http://www.troublefreepool.com/threa...x)-Will-update

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    Re: Insulation underlayment for Intex

    Quote Originally Posted by CeeElGee
    Quote Originally Posted by linen
    Extruded polystyrene is what you want (in your case the "pink stuff"). It can handle the conditions and has enough strength to minimize denting. I am not sure what the fiberboard you posted is...do you have a link?
    I couldn't find a link on Menards' or anybody else's website. I'm pretty much resigned to paying for the EPS. Trying to figure out how I'm going to justify it with The Boss
    I think it's justifiable. If you don't get the bottom surface of your AG pool right the first time, it's going to bother you. I know you are doing an Intex which is a different animal from my metal wall pool but I wish I'd used the foam. I used sand and a Gorilla pad but didn't really get the sand thick enough. Now the bottom surface of my pool is kind of rough and I'm stuck with it until it comes time to replace the liner. I really regret that I didn't do a better job on the bottom. It's the one mistake I made on what has otherwise been a fine DIY installation.
    Regards,
    Michael
    18ft. diameter, 48 inch deep Sharkline Reprieve AGP, 7000 gallons, Intex 14 inch sand filter with 3/4 H.P. 2,150 GPH pump, Intex SWG
    TF-100 test kit

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    Re: Insulation underlayment for Intex

    I set up my rectangular Intex pool last year with 2" foam on top of 3-4 inches of sand. The foam was a very nice smooth surface, did not dent, and had a soft feel to the bottom. I am really happy with it and wouldn't do without it.

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