Ben and Sam filled the house hole with sand and rented a compactor to help make the "pit" very flat and even.
They covered the sand with black 6 mil polyethylene sheeting and then covered the sheeting with extruded polystyrene.
Money Spent: $3257
$ 75 compactor rental
$ 200 sand
$ 248 6 mil polyethylene sheeting and stegotape
$2734 extruded polystyrene
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