Extensive Green Roof V Intensive Green Roof

The green roof as a habitat.

Extensive green roof v intensive green roof.

For a conventional roof. A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species. Almost always used for new construction intensive green roofs can be anything from a public garden to an entire park as is the case with the world s largest green roof millennium park in chicago which is 24 5 acres of landscaping on top of two subterranean parking garages. These systems range in thickness from 2 6 94 and weigh approximately 15 30lbs per sq ft.

8 to 20 per square foot. Extensive green roof systems extensive systems are simpler and lighter weight than intensive systems. There are two ways of planting a roof. It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants.

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. Typically these roofs will have more soil and some small shrubs as well as the low growing wildflowers and sedums found on an extensive roof. Due to their light weight and low profile they require less structural support and can be used on roofs with a slope of 30 b0 and higher. The plants that are mostly used on extensively planted roofs include grasses mosses herbs and.

Planted roofs create living space for animal species. The distinction is based on the kind of plant involved. 15 to 50 per square foot.