Markus hand carved foam blocks into boulders and rocks, and then coated them with special cement and paint. Even the house itself is entirely coated in foam! The walls, roof, mouldings- everything is foam.
The house is so well insulated, that when it's 120 degrees in the summer, the AC doesn't even come on till 2 in the afternoon! The secret to an energy efficient home isn't how much solar power you generate, but how well insulated your home is, that way you really don't need a lot of heating or cooling.
200 ACRES of Rothkranz land for sale in Kentucky