Intensive Vs Extensive Green Roofs

Green roofs are also known as vegetative or eco roofs.

Intensive vs extensive green roofs. Intensive vs extensive green roof. 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. A green roof comes in two varieties. These systems are ideal for efficient stormwater.

8 to 20 per square foot. Intensive planting there are two ways of planting a roof. 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. These systems range in thickness from 2 6 94 and weigh approximately 15 30lbs per sq ft.

Vegetative roofs are divided into two categories. 15 to 50 per square foot. In addition to the mosses grasses and sedum of extensive roofs semi intensive plantings include herbs flowering plants taller grasses and small shrubs. Intensive includes a thick layer of soil that can support large vegetation such as small trees.

A semi intensive green roof can give rise to a richer ecology with more diverse plant and 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. Extensive green roof systems extensive systems are simpler and lighter weight than intensive systems. These can easily be installed on sheds and garages.

1 extensive vegetative roofs which are 6 inches or shallower and are frequently designed to satisfy specific engineering and performance goals and 2 intensive vegetative roofs which may become quite deep and merge into more familiar on structure plaza landscapes with promenades lawn large perennial plants and trees. They fall into three main categories extensive intensive and semi intensive. 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.

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 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. 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. Semi intensive green roofs require a deeper soil layer but the payoff is in the types of plantings that can be used.

An extensive green roof is characterized by a thinner layer of soil and smaller plants. Although there are no precise definitions of. It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants. For a conventional roof.