Buildings with load-bearing earth walls were once widespread throughout Britain and many thousands still survive, including some dating from the fourteenth and fifteenth centuries. Earth is the ultimate form of 'green' building construction, creating no environmental pollutions and consuming virtually no energy. Subsoil can be dug from or near the site to construct buildings that will meet modern needs and conform to the latest building regulations. This book describes all aspects of earth building, explaining how earth performs as a building material and providing guidance on how best to repair and conserve existing earth buildings.