The growing medium depth for an extensive green roof system is typically 6 inches or less.
Intensive green roof section.
Intensive green roof garden roof roof garden an intensive green roof system is characterized by its variety of vegetation ranging from herbaceous plants to small trees with professionel maintenance and advanced green roof irrigation systems.
The intensive green roof uses planting mediums that have greater depth than the extensive green roof.
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.
Intensive green roofs require the deepest soil and have the greatest impact on the structural design but they also accommodate all types of plantings including large shrubs and trees.
For intensive green roof profiles a drain restrictor may be used to retain water in the base of the profile for subsequent plant transpiration.
This deeper soil allows intensive roofs to accommodate large plants and dramatic plant groupings.
Intensive systems allow the designer to create a park like setting so they are the best option for roof gardens that will be occupied.
What is a green roof.
Green roofs are also known as vegetative or eco roofs.
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.
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.
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.
An intensive green roof is a deeper typically greater than six inches heavier system designed to sustain complex landscapes.
Intensive green roof build ups over roofs and podiums are designed to be trafficked and should only be installed on flat roofs.
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.
They fall into three main categories extensive intensive and semi intensive.
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.
