Cool ideas – underground houses
Underground homes actually provide more shelter from the elements than do earth-berm or earth rammed homes which are typically covered with dirt, soil, and/or grass on 2 or 3 sides. The owners of underground homes will even tell you they feel safer in their house during an earthquake than they would in an above the ground dwelling or building.
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PAHS - Umbrella House
PAHS - Umbrella House - A simple underground house design uses a novel insulating/water-shedding blanket that covers the structure and surrounding soil. The umbrella creates a huge subterranean thermal reservoir that soaks up the sun’s energy during summertime and stores it for winter heating. In many cases, the clever design makes a heating system unnecessary. Click through for more info.