Green Roof From Above

Intensive green roofs with blue roofs.

Green roof from above.

Using green roofs in cities or other built environments with limited vegetation can moderate the heat island effect particularly during the day. Plants for extensive green roofs should have low growth height rapid growth spreading and fibrous roots that have high drought tolerance. Once you have more than r 20 in a roof assembly that is you meet the code things pretty much don t matter. Podium decks and other intensive green roofs with a blue roof element can also support the vegetation above.

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. Flat roof systems consist of a supp. 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. This green space could be below at or above grade but in all cases it exists separate from the ground.

Succulents such as sedum are often chosen for extensive green roofs because they withstand harsh conditions and minimize water loss. A green roof system is an extension of the existing roof which involves at a minimum high quality water proofing root repellent system drainage system filter cloth a lightweight growing medium and plants. 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. In some cases a green roof may include thermal insulation typically a layer of extruded polystyrene.

In other words go above r 20 and make green roof decisions for other reasons than energy. Green roofs save energy compared to uninsulated roofs or poorly insulated roofs or even better black poorly insulated roofs. Whilst the above examples are all on extensive green roofs it is possible to combine blue roofs with rooftop gardens. 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.

Many millions of square meters of flat roof are not yet green this means wasting an enormous potential of living space. For intensive green roof. Plants for extensive green roofs. In the city of chicago alone a weston design consultant study estimates the.

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.