Green roofs improve and reduce energy consumption. They can reduce heating by adding mass and thermal … See more

A properly designed and installed extensive green-roof system can cost $108–$248/m ($10–$23/sq ft) while an intensive green roof costs $355–$2,368/m ($33–$220/sq ft) However, since most of the materials used to build the … See more

The main disadvantage of green roofs is that the initial cost of installing a green roof can be double that of a normal roof. Depending on what kind of green roof it is, the maintenance costs could be higher, but some type… See more

Green roofs can be categorized as intensive, semi-intensive, or extensive, depending on the depth of planting medium and the amount of maintenance they need. Extensive green roofs traditionally support 50–120 kg/… See more

In ancient times green roofs consisted of cave-like structures or sod roofs covered with earth and plants commonly used for agriculture, dwelling, and ceremonial purposes. These early shelters provided protection f… See more

Industrial brownfield sites can be valuable ecosystems, supporting rare species of plants, animals and invertebrates. Increasingly in demand for redevelopment, these habitats are under threat. "Brown roofs", als… See more