Earth Shelters. The Benefits. Safety from fire, tornadoes, hurricanes and earthquakes. Low maintenance costs. Wide open spacious atmosphere. Environmentally sound. Savings of as much as 90% on energy costs. Benefits continued…. Provides substantial privacy.
A more modern twist on using earth for building is with earthbags. Earthbags can be stacked vertically to make either straight or curved walls, or they can be stacked into dome shapes that require no additional framing to make a roof. This house is made with bags filled with crushed volcanic rock, which is quite insulating. Other people have built with adobe-filled bags, shell-filled bags, or sand-filled bags. It is possible to add a stabilizer, such as Portland cement, to some loose soils that would otherwise not be stabile enough.