Earth Sheltered Solar House from recycled barn beams

This house was built in 1986 on top of a hill from mostly recycled materials- barn beams & steel & 3 cedar corn silos. There are 25 cubic meters of concrete on the 3 roofs with continuous layer of insulation on exterior of concrete structure & under radiant hollow floors. 3500 sq. ft of floor space. With 8"-18" of earth on the 3 roofs it is warm & cosy in the winter & cool & dry in the summer. I believe it is one of the most energy efficient houses in Canada

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