Green roofs are distinct from traditional rooftop gardens because they promote proven sustainable concepts. Typically rooftop gardens have been purely an aesthetic feature of a buildings ‘roofscape’.
Whilst Green roofs still pay attention to aesthetic considerations, their main objective is to minimise the buildings impact on the environment in an economically viable way. Green roofs maximize the potential of having vegetation on the roof by collecting and harvesting storm water via a well-designed drainage system and the use of materials that have been specifically developed to significantly minimize the waste of any valuable resource such as water. Additionally, green roofs take advantage of the relatively cooler environment by supporting photovoltaic cells (PV), which operate more efficiently in cooler environments
