Intensive Green Roof Section

The intensive green roof uses planting mediums that have greater depth than the extensive green roof.

Intensive green roof section.

A green roof is a green space that is created by adding various layers of plants and a growing medium to the top portion of a traditional roofing system. The weight of an intensive green roof system is critical for a particular type of plant and the minimum intensive green roof thickness should ranges from 150mm for a wild grassland 300mm for bushes and 3 meters in height and at least 400mm upper substrate and 250 mm lower substrate for small trees of approximately 10 meters. Another term for these green roofs is rooftop garden. Although there are no precise definitions of them an extensive green roof has a shallow growing medium usually less than six inches with a modest roof load limited plant diversity minimal.

Green roofs are also known as vegetative or eco roofs. Intensive systems allow the designer to create a park like setting so they are the best option for roof gardens that will be occupied. Intensive green roof build ups over roofs and podiums are designed to be trafficked and should only be installed on flat roofs. A typical growing medium depth of an intensive green roof is 6 inches or more.

Extensive green roofs 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. Note that it is not like a traditional roof garden in which planting is done in free standing containers as well as planters that are placed on an easy to access roof terrace. The growing medium depth for an extensive green roof system is typically 6 inches or less. Planting and waterproofing the build up heights and weights will be dependent upon the type of planting specified however as a rough guide 300 to 1500mm are the typical depths and weights could be in the region of 400kg to over a tonne per sqm.

An intensive green roof is a deeper typically greater than six inches heavier system designed to sustain complex landscapes. 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. What is a green roof. This deeper soil allows intensive roofs to accommodate large plants and dramatic plant groupings.

They fall into three main categories extensive intensive and semi intensive.