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Thread: Extruded Polystyrene Pool Base

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    Join Date
    May 2015
    Location
    fairfield, nj
    Posts
    19

    Extruded Polystyrene Pool Base

    Hey everyone, i'm installing a 15x30 oval pool in New jersey. I have 1 inch thick Extruded Polystyrene sheets for the base. I compacted the direct base with a plate compactor level which was an 18 inch to 0 dig out to get the ground level. I am going to backfill the low side after installing the base and pool. I was thinking about adding a root barrier like a 18 mil plastic sheeting or tarp, used for under concrete slabs under the XPS sheets. Would this be a good idea under the XPS? Is there anything else i need to do for a good stable XPS base?

    Thanks in advance for all your input.

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    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Extruded Polystyrene Pool Base

    1 thing that we almost never recommend is back filling, with that said if your using a plate compactor and done right by layers you may not have a problem, but it is still a possibility it could sink, that pool holds about 110,000 pounds of water I also dug down 2 inch on the south side and 24 inches on the north side and compacted screenings 2 inches deep, I still had settling... go figure

    I did not use any plastic sheeting or barrier but I have 0 trees and no grass what so ever under mine
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  3. Back To Top    #3

    Join Date
    May 2015
    Location
    fairfield, nj
    Posts
    19

    Re: Extruded Polystyrene Pool Base

    the back fill would be the overdig trench on the on the low side and not the base. Just wanted to make that clear thanks

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