Green Roofs Literal Meaning

Traditional black roofs absorb heat and lead to the overall increase of the city s temperature known as the urban heat island effect.

Green roofs literal meaning.

Some green roofs incorporate urban agriculture and include herbs and vegetables that can be harvested for use by the building s occupants or the community. They generally have lower water requirements and use small low growing plant species particularly succulents. Although there are no precise definitions of them an extensive green roof has a shallow growing medium usually less than six inches with a modest roof load limited plant diversity minimal. These trendy roofs bring a new literal meaning to the word cool as a recent study from the energy and buildings journal suggests that white roofs are up to three times more effective than green roofs at fighting climate change.

The initial expense of green rooftops often turns away prospective clients. Extensive green roofs are lightweight with a shallow layer of growing substrate of less than 200 mm deep requiring minimal maintenance. They fall into three main categories extensive intensive and semi intensive. A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium planted over a waterproofing membrane it may also include additional layers such as a root barrier and drainage and irrigation systems.

Green roofs are also known as vegetative or eco roofs. Container gardens on roofs where plants are maintained in pots are not generally considered to be true green roofs although.