Extensive Green Roof: Characterized by having vegetation that needs little maintenance and no permanent irrigation system. This kind of roof includes greenery from sedums to small grasses, herbs, and flowering herbaceous plants and it is more commonly seen on private houses or multi-family residential buildings.
Intensive Green Roof: Characterized by having a wide variety of vegetation of small, medium and big size that requires soil with greater depth and permanent maintenance as well as irrigation systems. This kind of roof includes grasses, flowers, shrubs and trees of different kinds and it is more commonly used on commercial buildings to create relax, dine or work areas. It often includes paths, walkways and terraces that are integrated with the vegetation.