As we know, the land is very scarcity in urban area, especially the big cities. The green belt is very important for people because it will improve the livable. On the other hand, more and more people need dwellings to live. It means that people need more residential land. How to balance residential demand and livable should need to been considered by urban designers.Green Roof supplement a new method to improve the greening rate in crowed urban without reduce the land for residential, commercial and public facilities. It takes neglected places and makes it useful. |
what is green roof?
A green roof system is a 'contained' green space on top of a human-made structure. The extension of the existing roof includes a high quality water proofing and root repellant system, a drainage system, filter cloth, a lightweight growing medium and plants. Green roofs can be installed using modular sections or created at the site.
A typical Green Roof System below. From the picture, a typical Green Roof Components
A typical Green Roof System below. From the picture, a typical Green Roof Components
- Protection Fabric
- Retention Fabric
- Drainage Plates
- Drainage Mats
- Drainage Channels
- Filter Fabric
- FLL approved growing media
What is the benefits?
Compared with traditional roof, Green Roof have many sensible benefits, including increasing energy costs with natural insulation, creating peaceful retreats for people and animals, improve air quality in the area and decreasing the Urban Heat Island Effect( according to EPA, the term "heat island" describes built up areas that are hotter than nearby rural areas). It is clear that the Green Roof surface temperature is less than the traditional roof from the heat map below.
Extensive and Intensive
There are two type of Green Roofs. One is the extensive green roof, the other is the intensive green roof. Considering the the different demand, the designers can choice different type in different projects.
Compared with extensive green roof and intensive green roof, the main policy below:
What is the More?
As a sustainability technology, Green Roofs have been used in some new buildings in many countries. And what is the next? Maybe green wall.
As a sustainability technology, Green Roofs have been used in some new buildings in many countries. And what is the next? Maybe green wall.
reference:
Green Roofs – a Useful Solution to Embellish Our Home and Live Better,<http://impressivemagazine.com/2013/06/01/green-roofs-a-useful-solution-to-embellish-our-home-and-live-better/>
EPA, Reducing urban heat islands: Compendium of Strategies- Green Roofs,<http://www.epa.gov/heatislands/resources/pdf/GreenRoofsCompendium.pdf>
Dowey S, What is a Green Roof, <http://science.howstuffworks.com/environmental/green-science/green-rooftop.htm>
Green Roofs – a Useful Solution to Embellish Our Home and Live Better,<http://impressivemagazine.com/2013/06/01/green-roofs-a-useful-solution-to-embellish-our-home-and-live-better/>
EPA, Reducing urban heat islands: Compendium of Strategies- Green Roofs,<http://www.epa.gov/heatislands/resources/pdf/GreenRoofsCompendium.pdf>
Dowey S, What is a Green Roof, <http://science.howstuffworks.com/environmental/green-science/green-rooftop.htm>