There is this large cold storage facility which has floor heaving problem due to freeze and ice formation in the moisture in the soil below freezer. The floor consists of one layer of concrete, one layer of insulation, and earth. there is glycol heating system below the insulation but for some reason it is too deep. it warms up about one foot. above that is a layer where freeze and thaw happens. any thought about it? what do you think is the best solution and why? taking the concrete and insulation out and putting a vapor barrier layer is too expensive. electric probes also consume a lot of energy.