Extensive green roofs.
Extensive green roof system.
These are covered with low growing plants such as evergreen sedums.
A properly designed and installed extensive green roof system can cost 108 248 m 2 10 23 sq ft while an intensive green roof costs 355 2 368 m 2 33 220 sq ft however since most of the materials used to build the green roof can be salvaged it is estimated that the cost of replacing a green roof is generally one third of the initial installation costs.
Extensive semi intensive and intensive green roofs.
Extensive roofs are typically lightweight and can be installed over a variety of structures including metal roof decks.
An extensive garden roof assembly can be applied to flat roofs and sloping roofs with a pitch of up to 12 12 or 45 provided the appropriate measures are taken to cope with the shear forces and soil retention.
8 to 20 per square foot.
Typically they have thin layers of substrate the growing medium to keep depth and weight to a minimum.
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.
Green roofs are also known as vegetative or eco roofs.
They fall into three main categories extensive intensive and semi intensive.
The heart of the nophadrain extensive green roof system the nd 4 1h drainage system is the ideal under layer for an 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.
15 to 50 per square foot.
These systems are ideal for efficient stormwater.
Extensive green roofs sedum roof systems.
The movement of people is limited to maintaining a watertight roofing membrane and the health of the plants.
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.
Besides the visual impact of an extensive green roof they also provide a natural habitat for birds and insects.
The biggest benefit of extensive green roofs is that they need very little maintenance.
To start with take a look at the most simple family of green roofs.
This multifunctional ce marked drainage system with high compressive strength protects the vegetation from water stagnation while at the same time storing water for dry periods in the built in water reservoir.
From a distance an extensive sedum roof can be mistaken for a grass field.
Three types of green roofs exist.
Finally the extensive green roof is a system that is generally inaccessible to pedestrians.
