Intensive roofs take more time to manage as they can hold up to 150 pounds of vegetation per square foot.
Green roof roof drainage concepts.
The roof can provide natural substrate and processes for plant growth.
The green roof consists of 8 superimposed layers 1 to 8.
Is not able to drain properly it can negatively impact the vegetation due to over.
The unique needs of a green roof installation.
Saturation of the soil.
Integration with hard landscapes for example walkways terraces driveways or play areas etc.
The growing medium substrate the plant layer.
Moisture will be lost to the atmosphere as a result of evapotranspiration during dry periods.
For green roofs small plants with fibrous roots and low water requirements are best suited.
Design of drainage systems must be matched to the roof construction and catchment area.
A green roof is an additional roof system on top of an existing roof made up of a layer of planted vegetation.
In addition to stormwater source control green roofs.
The design of the different drainage layers allows for a portion of the stormwater to be retained above where the water is allowed to flow freely off of the roof.
Operating within the green roof are the interception of rainfall by the plant layer infiltration and storage in the substrate and reservoir storage in the drainage layer.
A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system.
Green roof solutions offers many different drainage layer options depending on system goals regarding water retention.
As the soil takes on excessive amounts of water it continues to.
There are two main forms of green roofs intensive and extensive.
System build up roof garden the roof garden green roof system is a multifunctional green roof build up with high water storage.
The roof garden build up allows for the realisation of a variety of design concepts even waterfeatures.
The green roof can be established on any load bearing components concrete tanbark wood.
Having proper drainage on a green roof is a critical aspect of the system.
These are collector drains that are designed to flow when only partly full.
A water proof layer material for water retention and proper drainage helps plant growth and at the same time protects the roof and building from damage.
The drainage capacity is tested according to en iso 12598.
Primary drainage systems are not designed to remove all of the water that falls on a roof during exceptionally heavy rain.
On zero degree roofs a roof dam irrigation system can be installed which stores up to 40 mm of water.
This makes for lush plant growth on relatively thin substrate layers.
The load bearing component of the roof.
The waterproofing membrane root barrier the drainage layer.
