Cob
Earth amassed and stacked, that is in itself its definition, although can also be form-shaped. It’s the oldest technique He knows. When it’s built with COB it looks like child’s play, but is itself, the most complete and profound technique there is. There is no no technique that meets the qualities of COB. Monolithic and anti-seismic, it is structural, super organic in shapes for its malleability to the point that almost any shape can be achieved, thermal and acoustic insulation.