Cob is known as the “duct tape” of natural building. Made up of simple materials available almost everywhere including clay, straw, and sand, cob embodies the spirit of natural building: low-impact, durable, and useful for projects ranging from small bread ovens to full-size structures. We will learn how to assess clay soils for building, how to develop a cob recipe, and the basics of making and building with cob. The class will work on a section of the intern shower-house at the Solar Living Center, and will look at many other examples and case-studies of cob buildings around the site.