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Transcript of Green
Protects the waterproofing of the roof from penetration by plant roots. 6. Plant Level.
Drought-resistant and robust plants like sedum-species up to demanding shrubs, bushes and even trees. 5. Growing Layer.
It suits the needs of the green roof vegetation and provides for a stable growing environment. 4. Filter Sheet.
Prevents fine particles from being washed out of the substrate soil, thereby ensuring the efficiency of the drainage layer. 2. Moisture Retention. Protects the root barrier from mechanical damage, as well as retaining water and nutrients. 3. Drainage Layer.
Retains rainwater in troughs on the upperside, whilst the surplus water is safely drained away. Necessary ventilation to the root area is also guaranteed. GREEN ROOF SYSTEMS It is an extension, built on top of a human-made structure, that allows vegetation to grow in a growing medium.
They take a neglected space and make it useful without disrupting urban infrastructure. Intensive The origins of green roofs began thousands of years ago. The most famous green roofs were the Hanging Gardens of Babylon. They were considered as one of the Seven Wonders of the Ancient World and were constructed around 500 B.C. They were built over arched stone beams and waterproofed with layers of reeds and thick tar. But, what we define as the "modern" green roof, was first developed in Germany in the 1960s. Now, we can find them all over the world. ORIGINS Extensive THERE ARE TWO TIPES OF GREEN ROOFS THE CHICAGO CITY HALL Their maintenance is regular and depends on the landscape design and the chosen plant material. (an example of intensive green roofs) This is the most visual kind of green roof and is used in lots of structures. Intensive green roofs can be compared to building a garden on a roof. They Are usually multifunctional, accessible and require more weight and a deeper system build-up. They are used essentially in elevated parks. They can sustain shrubs, trees, walkways, benches and a big variety of vegetation. California Academy of Sciences Why should we have a green roof ? The Green Technology Showroom in Beijing, China Extensive landscaped roofs are an ecological alternative to conventional surface protection or ballast layers. They reproduce natural habitats and attract flora and fauna into the area.
Extensive green roofs usually exist for their environmental benefits and don't function as rooftop gardens. Extensive green roofs are lighter than intensive green roofs (7-23 kilograms) per square foot. They require a minimal maintenance (1 or 2 inspections per year) because they get water and nutrients mostly by natural processes. Economical benefits of a green roof: Ecological benefits of a green roof: *Provides Rainwater Management
*Improves the Microclimate
*Binds Dust and Toxic Particles
*Improves Noise Protection
*Provides Natural Biodiverse Habitats
*Supports Recycling *Increases Water Retention, so a green roof can reduce water run-off by 50–90 % and can reduce sewer and construction costs.
*Reduces Energy Costs: because green roofs have the ability to buffer extreme temperatures.
*Provides Additional Space and avoids the construction of other structures. http://en.wikipedia.org/wiki/Green_roof
http://science.howstuffworks.com/environmental/green-science/green-rooftop.htm REALIZED BY:
Antía Soto Suárez
Silvia España Rivero
Alba Fernández Tuset