Dead and imposed loads should be calculated in accordance with bs en 1991 1 1 be en 1991 1 3 and bs en 1991 1 4 and should include the weight of the waterproofing system saturated weight of the green roof components and substrate vegetation snow loads and imposed loads such as access by people and vehicles as well as point loads for.
Green roof roof drainage concepts.
The roof can provide natural substrate and processes for plant growth.
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.
These are collector drains that are designed to flow when only partly full.
The green roof consists of 8 superimposed layers 1 to 8.
In addition to stormwater source control green roofs.
The most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after rainfall.
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.
Integration with hard landscapes for example walkways terraces driveways or play areas etc.
On zero degree roofs a roof dam irrigation system can be installed which stores up to 40 mm of water.
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.
As the soil takes on excessive amounts of water it continues to.
A green roof is an additional roof system on top of an existing roof made up of a layer of planted vegetation.
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.
Saturation of the soil.
A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system.
Intensive roofs take more time to manage as they can hold up to 150 pounds of vegetation per square foot.
Moisture will be lost to the atmosphere as a result of evapotranspiration during dry periods.
Green roof solutions offers many different drainage layer options depending on system goals regarding water retention.
The drainage capacity is tested according to en iso 12598.
The waterproofing membrane root barrier the drainage layer.
It is suitable for lawns perennials and with deeper growing media for shrubs and trees.
This makes for lush plant growth on relatively thin substrate layers.
System build up roof garden the roof garden green roof system is a multifunctional green roof build up with high water storage.
There are two main forms of green roofs intensive and extensive.
Design of drainage systems must be matched to the roof construction and catchment area.
The unique needs of a green roof installation.
The growing medium substrate the plant layer.
Having proper drainage on a green roof is a critical aspect of the system.
The load bearing component of the roof.
