The green roof industry is booming and the technology changing fast as professionals respond to the unique challenges of each new implementation. In this comprehensively updated, fully revised edition of their authoritative reference, Nigel Dunnett and Noel Kingsbury reveal the very latest techniques, materials, and plants, and showcase some spectacular new case studies. Planting on roofs and walls began in Europe but is now becoming popular all over the world as people become aware of their beneficial impact on the environment. Green roofs and walls reduce pollution and run-off, help insulate and reduce the maintenance needs of buildings, contribute to biodiversity, and provide food and habitats for wildlife. In addition to all this, they are attractive to look at and by greening up living environments enhance the quality of life of residents. In Green Roofs and Living Walls the authors describe and illustrate the practical techniques required to design, implement and maintain a green roof or wall to the highest professional standards. They go on to explain how roofs may be modified to bear the weight of vegetation, discuss the different options for drainage layers and growing media, and list the plants suitable for different climates and environments. This informative, up-to-the-minute reference will captivate professionals with its illuminating new findings, and encourage gardeners everywhere to consider the enormous benefits to be gained from planting on their roofs and walls.