DT117/4 Sustainable Build & Design - Class Presentations

1. Green Roofs Sungwoo Hong D07109970 Construction Mgmt & Tech

2. Contents 1. Environmental Problems. 2. Definition of Green Roofs 3. Detail of Green Roofs 4. Green Roof benefits 5. 6. Case study (Apartment in Parnell St)

3. Environmental Problems

4. Air pollution About 400,000 People die each year in Chinese cities due to air pollution.

5. Flood - Storm water Dr. Roger Pielke, Jr., who has done significant research concerning the determination of flooding related losses has an assessment of the damages between 100 and 150 billion dollar (U.S.A)

6. Energy Consumption - Waste

7. Global warming

8. Noise Pollution Freedom of Information Act (FOI) request reveal in the period April 2008 - 2009UK councils received 315,838 complaints about noise pollution from private residences.

9. Any solution?

10. What is green roof?

11. What are the Green roofs? Roofs that are purposely fitted or with vegetation are known as green roofs or living roofs.(CIBSE Knowledge series) / which is simply green in the economic sense (GaryGrant) The modern green roofs started from Germany in the 1970s and 1980s.

12. Technical Detail of Green roofs

13. Types of Green Roof Three main types of Green Roof: Extensive: extensive sedum or extensive biodiverse Simple intensive (Semi-intensive): which can also be biodiverse Intensive:

14. Extensive Sedum Depth of substrate: 20-100mm Suitable flora: mosses, grasses, some flowering plants, etc Maintenance requirement: Low Relative cost: Low Good effect on summer overheating/attenuation of storm water moderate to good

15. Extensive biodiverse (rubble roof or brown roof) Depth of substrate: less than 100mm Suitable flora: self-seed, local plant Maintenance requirement: Very low Relative cost: Low Slight effect on summer overheating / Negligible winter insulation / attenuation of storm water good

16. Simple intensive Depth of substrate: 150-500mm Suitable flora: grasses, typical flowering garden plants and shrubs Maintenance requirement: require some maintenance Relative cost: moderate excellent effect on summer overheating / negligible on winter insulation / attenuation of storm water good to excellent

17. Intensive (Roof Garden) Depth of substrate: 150-500mm Suitable flora: all vegetation Maintenance requirement: frequent Relative cost: High Excellent effect on summer overheating/attenuation of storm water good to excellent

18. How does it work? Green Roof system absorbs many of the mineral in the polluted air into its soil as nutrition, thus reducing the smog

19. How does it work? (Cont) Green roof absorb the CO2 and produce O2 through the process of photosynthesis, thus cleaning the air we breath

20. How it works? (Cont) Green Roof system will hold approximately 70% of the rainwater from a 6cm downpour. The water is released gradually through evaporation and over flow. This system protect the roof from the elements. Such a roof protection would usually cover the initial costs of the Green Roof installation.

21. How does it work? (cont) Green Roof insulation the building thus reducing writer energy costs. Whilst there are conflicting views on the causes of global warming it is widely agreed that Green Roof create a cooler/cleaner environment.

22. How does it work? (cont) Green Roof have a natural cooling effect and can shield the building from the heat of the sun thus less energy for air conditioning needed. The cooling effects of green roof improved the performance of solar panels.

23. How does it work?(cont) Green Roof absorb noise and prevent it from bouncing into adjacent buildings.

24. How does it work? (cont) Green Roof contribute to the quality life for residents. It encourage wildlife to return t o the cities

25. Case(Roof garden) – Ivy exchange in Parnell St

27. What is the next? There are enough evidence and successful examples of real benefit of Green Roofs. Architects, planners, engineer, developers, builders need to realise its potential power and need to use more widely. More research is required to quantify other more obvious benefits. Legislation need to be changed to encourage people to use Green roof more.

28. The future Desinged by architects Emilio Ambasz & Associates and opened in 1993, the ACROS building complements and effectively extends the adjacent Tenjin Central Park

29. The future This is a Hundertwasser Building in Vienna, Austria, designed by FriedensreichHundertwasser.

30. Reference http://sciencepolicy.colorado.edu/prometheus/archives/disasters/000563part_ii_historical.htm