A lavishly illustrated study of gardens built on the roofs of buildings. The first comprehensive hook in English about roof gardens, this survey includes a history of roof gardens, which date back to the hanging gardens of Nebuchadnezzar; summarizes contemporary design principles; details the techniques used in constructing durable and safe gardens; and gives guidelines for the selection of plants, planting procedures, and maintenance Sixty major projects from around the world are shown in color making the hook an important resource for designers and planners.