The 2,769-square-foot, single-level, three-bedroom, three-bath home also benefits from the inherent insulating value of the ICF system. By design, the lightweight, interlocking blocks serve as both the poured concrete forms for the home’s perimeter walls and provide 2½ inches of expanded polystyrene (EPS) foam to insulate the interior and exterior walls, respectively—an overall thermal value of R-26, or about 58% more efficient than a wood-framed wall. The system also serves as an air barrier and vapor retarder, eliminating the need—and cost and time—to purchase and install those products separately to achieve the same performance. “A big plus with ICF is there is no thermal transfer in the ICF walls or air infiltration,” Wilson says. “The benefit is fewer allergens entering the home, making it a healthier home.”