Natural buildings not only bring satisfaction to their makers and joy to their occupants, they also leave the gentlest footprint on the environment. Through their work as builders, consultants, and educators, Jacob Dave Racusin and Ace McArleton merge their passions for fine craft, ecological stewardship, relationship to place, and social justice. The Natural Building Companion is a complete guide to natural building philosophy, design, and technique. basic principles of building science, including structural and thermal engineering, and hydrodynamics. This guide offers thorough, up-to-date, and advanced installation details and performance characteristics of straw-bale, straw-clay, woodchip-clay, and cellulose wall systems, as well as earthen and stone wall systems and a variety of framing, roofing, flooring, mechanical system, and finishing options.