Extensive Green Roof V Intensive Green Roof

A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species.

Extensive green roof v intensive green roof.

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. 8 to 20 per square foot. For a conventional roof. Extensive green roof systems extensive systems are simpler and lighter weight than intensive systems.

There are two ways of planting a roof. The green roof as a habitat. 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.

Planted roofs create living space for animal species. 15 to 50 per square foot. These systems range in thickness from 2 6 94 and weigh approximately 15 30lbs per sq ft. The plants that are mostly used on extensively planted roofs include grasses mosses herbs and.

It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants. 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. Intensive vs extensive a green roof comes in two varieties.