Plants for extensive green roofs should have low growth height rapid growth spreading and fibrous roots that have high drought tolerance.
Green roof from above.
A green roof or rooftop garden is a vegetative layer grown on a rooftop.
An intensive green roof is a deeper typically greater than six inches heavier system designed to sustain complex landscapes.
The projects are located on a variety of building sites and represent a diverse set of available extensive green roof installation types including vegetated mat built up and modular tray systems as well as plant types.
Once you have more than r 20 in a roof assembly that is you meet the code things pretty much don t matter.
This green space could be below at or above grade but in all cases it exists separate from the ground.
While this can be positioned below the roof deck installation above the waterproofing known as an inverted green roof is preferred as it further protects the membrane from condensation and physical damage.
An extensive green roof is a thin usually less than six inches lightweight system that is typically predominantly planted with succulents drought tolerant ground covering plants and grass.
Using green roofs in cities or other built environments with limited vegetation can moderate the heat island effect particularly during the day.
Whilst the above examples are all on extensive green roofs it is possible to combine blue roofs with rooftop gardens.
In other words go above r 20 and make green roof decisions for other reasons than energy.
Plants for extensive green roofs.
Green roofs allow energy saving due to a reduction in summer air condi tioning of 25 let alone the fact that the heat resistance of green roofs is higher and benefits are also gained in terms of winter heating in germany more than 10 of roofs are green roofs.
In this report we present an analysis of water benefits from an array of observed green roof and control non vegetated roof project sites throughout nyc.
Green roofs save energy compared to uninsulated roofs or poorly insulated roofs or even better black poorly insulated roofs.
In some cases a green roof may include thermal insulation typically a layer of extruded polystyrene.
Many millions of square meters of flat roof are not yet green this means wasting an enormous potential of living space.
In the city of chicago alone a weston design consultant study estimates the.
Succulents such as sedum are often chosen for extensive green roofs because they withstand harsh conditions and minimize water loss.
Flat roof systems consist of a supp.
In fact as weight is less of an issue there is potential to store more water.
Green roofs provide shade remove heat from the air and reduce temperatures of the roof surface and surrounding air.
Podium decks and other intensive green roofs with a blue roof element can also support the vegetation above.
