Intensive Vs Extensive Green Roofs

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.

Intensive vs extensive green roofs.

A green roof comes in two varieties. Intensive includes a thick layer of soil that can support large vegetation such as small trees. 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 succulents.

It should be clear from the above which green roof type is best for you. Although there are no precise definitions of. Extensive green roof an extensive green roof system is characterized of its vegetation ranging from sedums to small grasses herbs and flowering herbaceous plants which need little maintenance and no permanent irrigation system the growing medium depth for an extensive green roof system is typically 6 inches or less. Intensive planting there are two ways of planting a roof.

These systems are ideal for efficient stormwater. 8 to 20 per square foot. These systems range in thickness from 2 6 94 and weigh approximately 15 30lbs per sq ft. The distinction is based on the kind of plant involved.

In addition to the mosses grasses and sedum of extensive roofs semi intensive plantings include herbs flowering plants taller grasses and small shrubs. These can easily be installed on sheds and garages. 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. A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species.

For a conventional roof. Vegetative roofs are divided into two categories. Extensive green roofs. Intensive vs extensive green roof.

It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants. If you are looking for a low maintenance lightweight green roof that features simple and self maintaining vegetation then the extensive green roof is for you. A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly sloped roof. 15 to 50 per square foot.

Semi intensive green roofs require a deeper soil layer but the payoff is in the types of plantings that can be used. Green roofs are also known as vegetative or eco roofs. Extensive green roof systems extensive systems are simpler and lighter weight than intensive systems. What is a green roof.