With a pedigree of almost two hundred years corrugated iron is a much undervalued material that was used extensively in traditional construction. The material is relatively light, portable and its adaptability means that is was often used to replace or cover a thatch roof, or construct a large agricultural or industrial building. This INFORM provides some historical background, and addresses the physical properties of the material and its uses. It also covers the conservation, repair and maintenance of corrugated iron in a variety of situations