There are two ways of planting a roof.
Extensive green roof vs intensive.
An extensive green roof is characterized by a thinner layer of soil and smaller plants.
With more depth of growing substrate 100 200 mm it can support a greater diversity of plants but not shrubs and trees.
The distinction is based on the kind of plant involved.
It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants.
For a conventional roof.
Extensive green roofs.
Semi extensive green roof.
8 to 20 per square foot.
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.
15 to 50 per square foot.
A semi extensive green roof sits somewhere in between the two main options and is based on the extensive roof principles.
Intensive includes a thick layer of soil that can support large vegetation such as small trees.
Intensive vs extensive green roof.
Planted roofs create living space for animal species.
Our semi intensive green roof systems include a richer deeper substrate and drainage solution compared to extensive roofs enabling use of a wider range of complex plant mixtures.
The green roof as a habitat.
A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species.
These systems are ideal for efficient stormwater.
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.
The plants that are mostly used on extensively planted roofs include grasses mosses herbs and.
You can compare an intensive roof to a normal garden and this is why an intensive green roof is also known as a roof garden or garden roof.
In addition to the mosses grasses and sedum of extensive roofs semi intensive plantings include herbs flowering plants taller grasses and small shrubs.
Semi intensive green roofs as their name states are a combination of the aforementioned two types.
To bear this weight an expensive custom support structure is required.
Extensive roofs are thin lightweight roof systems that typically have a planting media measuring 6 to 20 cm deep while heavier thicker green roofs are known as intensive roofs and their growing media ranges in thickness from 20 cm to 100 cm.
Intensive vs extensive a green roof comes in two varieties.
Semi intensive roofs are generally used within highly visible area s to improve aesthetic design using small shrubs forbs and grasses.