Earth, in common use for architectural construction for thousands of years, has in recent years attracted new attention as a healthy, environment-friendly and economical building material. An impressive number of buildings has been realised not just in hot and dry regions but also in the colder climates of Europe and North America. Technical innovations such as prefabricated rammed earth components, clay panels or earth walls from a 3D printer facilitate the use of this sustainable material. This manual, now in its fifth and revised edition, describes the building technology of rammed earth. The physical properties and characteristic values are explained in a hands-on manner: With proper moisture protection, earth buildings are very durable, and in particular the combination with wood or straw allows a wide spectrum of design options. Thirty international built examples demonstrate the range of applications for this fully recyclable material.