The home is insulated from Maine's tough winters by a shallow foundation laid with 8 inches of EPS foam. The foam extends out horizontally to prevent frost from getting under the house. "It's more efficient than digging a deep foundation,  Photo 3 of 14 in Favorites by Christina Horner from A Passive House in Maine Is One Couple’s New Start After Losing Everything in a Fire

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The home is insulated from Maine's tough winters by a shallow foundation laid with 8 inches of EPS foam. The foam extends out horizontally to prevent frost from getting under the house. "It's more efficient than digging a deep foundation,