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Three first floor walls and all four
faces of the pyramid are made of R-Control Panels manufactured
by Big
Sky Insulation, Belgrade, Montana.
These panels are constructed of
10.5" & 12.5" expanded polystyrene sandwiched between two sheets of
osb (oriented strand board). They have excellent insulation
qualities, boasting an R-value of between 39.88 49 at 40 degrees F.
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ALT ENERGY
