Ecohouse is an exciting and timely text that tells you how to design low energy, environmentally friendly buildings today. It also provides the foundations for building design in a warming world, and stepping stones towards the zero-carbon emission buildings of tomorrow.Sue Roaf is famed for her approach to design and her awareness of energy efficiency. Here she reveals the concepts, structures and techniques that lie behind the realization of her ideals. By using her own house as a case-study Roaf guides the reader through the ideas for energy efficient design or 'eco design'.This guide to the ecohouse also explores 21 case-studies from around the world, from Norway and Sweden to India and Japan, Argentina and Mexico. Chapters by Christopher Day, Katerine Bohn and Andre Viljoen on ecological building materials and methods and a contribution by Robert and Brenda Vale - all experts in this fieldEcohouse has a regularly updated companion web site providing further information on all issues relating to Ecohouse and eco design. Log on to www.bh.com/companions/ecohouse for a direct link.* Learn about the key issues of form and construction in Eco house design * Gain an understanding of building materials and their energy and environmental impacts - now essential for both student and practitioner* Theory is shown in practice with 21 case-studies from around the world