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Varying Shades of Green: Selected Experience and Research on Green Roofs Krishnan

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Varying Shades of Green: Selected Experience and Research on Green Roofs Krishnan

  1. 1. Varying Shades of Green From Concrete to Green: Green Roofs at Denver Botanic Gardens <ul><li>Sarada Krishnan </li></ul><ul><li>Denver Botanic Gardens </li></ul><ul><li>2010 APGA Annual Conference </li></ul><ul><li>June 4, 2010 </li></ul>
  2. 2. Outline <ul><li>Green roof systems </li></ul><ul><ul><li>Extensive system </li></ul></ul><ul><ul><li>Intensive system </li></ul></ul><ul><li>Denver Botanic Gardens’ green roof systems </li></ul><ul><ul><li>Intensive retrofit – Western Green roof </li></ul></ul><ul><ul><li>Intensive new – Children’s Garden Green roof </li></ul></ul><ul><ul><li>Tray system – Welcome Pavilion </li></ul></ul>
  3. 3. Green Roof Systems <ul><li>Extensive Systems – 6” of planting medium or less </li></ul>California Academy of Sciences
  4. 4. Green Roof Systems <ul><li>Intensive Systems – More than 6” of planting medium </li></ul>Conference Center at Temple Square, Salt Lake City
  5. 5. DBG – Intensive Retrofit September 2007
  6. 6. Intensive Retrofit
  7. 7. Intensive Retrofit
  8. 8. Intensive Retrofit
  9. 9. Intensive Retrofit November 2007
  10. 10. Intensive Retrofit May 2009
  11. 11. Intensive New <ul><li>Mordecai Children’s Garden </li></ul>
  12. 12. Green roof System <ul><li>Hydrotech System </li></ul>Roofing membrane Root barrier Insulation/air barrier Water retention Drainage/water storage Filter fabric Planting medium
  13. 14. Drainage System – Planting Areas
  14. 15. Drainage System – At Geofoam
  15. 16. Drainage System – at Concrete Paving
  16. 18. Terrace Trellis <ul><li>Trailhead Terrace </li></ul>
  17. 20. Boardwalk
  18. 21. Boardwalk
  19. 23. Pika Peak
  20. 25. Rooftop Berm
  21. 26. Geofoam Layout
  22. 27. Geofoam Layout
  23. 29. Irrigation
  24. 30. Tree Staking Details
  25. 31. Tree Staking
  26. 32. Tray System – Welcome Pavilion

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