To put it simply, green roofs are vegetated rooftops. However the installation of a green roof system requires more than a truckful of soil and some flowers. A green roof system consists of a high quality water proofing, a root repellent system, a drainage system, filter cloth, a lightweight growing medium and of course, plants.
Green roof have all sorts of benefits to the building, building owners and users. Here is a brief list:
-Protection of the roof membrane
-Savings on energy costs related to heating and cooling the building
-Urban Habitat Creation
-Mitigation of the Urban Heat Island Effect
For detailed information on all of these benefits and more, see the Green Roofs for Healthy Cities