The distinction is based on the kind of plant involved.
Extensive roof planting.
Climate clearly plays a major role in choosing the best plants for a green roof.
The selected group of plants requires very little maintenance and develops into a stable ecosystem.
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.
Herbaceous or shrubby species which use more water than succulent species will be more effective plant choices.
Complex roof planting scheme with bauder wsp 50 water storage panel extensive ex 2 cost effective roof planting with bauder sdf mat.
Light and fairly thin the plant system can be established on any type of support such as wood or steel.
The intensive green roof uses planting mediums that have greater depth than the extensive green roof.
These need 10 20cm 4 8in depth of growing medium enough to support perennials but not shrubs and trees.
Plant selection for stormwater management.
If a roof is designed to soak up water and remove contaminants in the water during storm events species that use water effectively and that accumulate nutrients should be explored.
Another term for these green roofs is rooftop garden intensive green roofs require more maintenance because of the plant varieties they.
It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants.
This deeper soil allows intensive roofs to accommodate large plants and dramatic plant groupings.
Extensive roofs only require a shallow growing media depth generally as little as 3 6 depending on the region and therefore add little weight to the roof structure below when compared to a standard ballasted pmr roof.
Extensive green roofs have a growing depth of 3 to 6 inches and are typ.
They can be created for example on a gently sloping shed roof by building a grid of wooden cells on top of the roof and filling the cells with compost.
The extensive green roof should be distinguished from the traditional roof garden.
Comes a desire to have greater plant diver sity so that the green roof functions on an environmental level as well as provides a pleasing landscape.
Recommended plant types for extensive roofs need to be drought wind and frost resistant such as self generating sedums.
They are economical to buy and easy to care for because they largely survive.
There are two ways of planting a roof.
The plants that are mostly used on extensively planted roofs include grasses mosses herbs and succulents.
Install a protective drainage and filter layer in a single step.
Green roofs are classi cally described by the depth of the growing medium extensive semi intensive and intensive.
