This in-depth course focuses on the conservation and repair of traditional slate and stone buildings and also gives an introduction to their history. The starting point is an understanding of how the roofs work, the different materials used, including regional variations and methods of construction. Modern codes of practice and standards are covered, with practical demonstrations and hands-on work in making and preparing slates and the application of mortars to roofs. The setting out, recording and the construction of both random and single sized roofs are also included. The course will be supplemented by films and practical sessions on surveying old roofs, traditional detailing, writing specifications and finding sources of information.