These systems range in thickness from 2 6 94 and weigh approximately 15 30lbs per sq ft.
Extensive green roof v intensive green roof.
It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants.
The green roof as a habitat.
Intensive includes a thick layer of soil that can support large vegetation such as small trees.
The distinction is based on the kind of plant involved.
There are two ways of planting a 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.
A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species.
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.
Extensive green roof systems extensive systems are simpler and lighter weight than intensive systems.
An extensive green roof is characterized by a thinner layer of soil and smaller plants.
The plants that are mostly used on extensively planted roofs include grasses mosses herbs and.
For a conventional roof.
15 to 50 per square foot.
Planted roofs create living space for animal species.
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.