extensive vegetated roof definition - Architecture Dictionary

extensive vegetated roof

A roof that is covered with plants and typically not designed for general access. Usually an extensive system is a rugged green roof that requires little maintenance once established. The planting medium in extensive vegetated roofs ranges from 1 to 6 inches in depth. (Adapted from U.S. EPA) exterior vegetated surface area the total area of vegetation on the project site, including vegetated roofs and turf grass