Intensive Green Roof Section

The modular units are often plastic or metal trays filled with growing medium.

Intensive green roof section.

Intensive systems allow the designer to create a park like setting so they are the best option for roof gardens that will be occupied. A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq. The build up heights and weights will be dependent upon the type of planting specified however as a rough guide 300 to 1500mm are the typical depths and weights could be in the region of. Intensive green roofs require the deepest soil and have the greatest impact on the structural design but they also accommodate all types of plantings including large shrubs and trees.

A properly designed and installed extensive green roof system can cost 108 248 m 2 10 23 sq ft while an intensive green roof costs 355 2 368 m 2 33 220 sq ft however since most of the materials used to build the green roof can be salvaged it is estimated that the cost of replacing a green roof is generally one third of the initial installation costs. For a conventional roof. 8 to 20 per square foot. 15 to 50 per square foot.