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  • 1. Green Roof Design and Construction an introduction California Center for Sustainable Energy September 15, 2009 Robert Thiele, Architect A.I.A. LEED AP Wednesday, September 9, 2009
  • 2. living water collecting peddles water storage succulent chalk dudleya Arid Climate Nature Wednesday, September 9, 2009
  • 3. Wednesday, September 9, 2009
  • 4. The Living Building Harvest all its own energy and water Adapted to climate and site Operates pollution free Promotes health and well-being Comprised of Integrated Systems Is Beautiful Wednesday, September 9, 2009
  • 5. James Hubbell my school of the organics 1971 Wednesday, September 9, 2009
  • 6. 2003 Paolo Soleri 1973 solar architecture Arcosanti Cortez Junction, Arizona arc-ology architecture and ecology 1973 Wednesday, September 9, 2009
  • 7. Cristo Umbrellas Project 1991 Wednesday, September 9, 2009
  • 8. my first commission large overhangs for sun and rain 1978 Wednesday, September 9, 2009
  • 9. GREEN ROOFS styles change Wednesday, September 9, 2009
  • 10. Green Roofs embody the spirit of green building Wednesday, September 9, 2009
  • 11. San Diego’s Climate Change 2050 Wednesday, September 9, 2009
  • 12. Green Roofs For An Arid Coastal Climate Stormwater Management to protect against erosion Wednesday, September 9, 2009
  • 13. Cave Store, La Jolla Green Roof on Historic Structure Wednesday, September 9, 2009
  • 14. Create Urban Roof Top Access Wednesday, September 9, 2009
  • 15. Urban Roof Tops Creating new real estate Wednesday, September 9, 2009
  • 16. Urban Roof Tops Creating Access Wednesday, September 9, 2009
  • 17. L.I.D. LOW IMPACT DEVELOPMENT STORMWATER MANAGEMENT BIOSWALES GREEN ROOFS RAINWATER HARVESTING INFILTRATION Wednesday, September 9, 2009
  • 18. Wednesday, September 9, 2009
  • 19. Green Roofs: Beautiful and Innovative Solutions to Stormwater Pollution A green roof is a contained green space on top of a human-made structure below, above or at grade. Wednesday, September 9, 2009
  • 20. Green Roofs on homes and Bio-swales in median, parkways and landscaped areas could filter storm ASBS water and Area of Special Biological reduce Significance pollution La Jolla Marine Reserve Wednesday, September 9, 2009
  • 21. Bio-Swales and Green Roofs Wednesday, September 9, 2009
  • 22. Rainwater Harvesting Wednesday, September 9, 2009
  • 23. GREEN ROOFS Wednesday, September 9, 2009
  • 24. Green Roofs Academy of Science, San Francisco Wednesday, September 9, 2009
  • 25. Green Roofs Los Angeles Green Roofs - Cooling Los Angeles A Resource Guide Environmental Affairs Department City of Los Angeles 200 N. Spring Street., Suite 2005 Los Angeles, CA 90012 Wednesday, September 9, 2009
  • 26. Green Roofs in San Diego Permit Process Alternate Means and Methods 2008 Wednesday, September 9, 2009
  • 27. Wednesday, September 9, 2009
  • 28. Standards and Codes Wednesday, September 9, 2009
  • 29. ASTM Standards Green Roof Systems E 2396 Standard Practice Saturated Water Permeability of Granular Drainage Media * E 2397 Standard Practice for Determination of Deed Loads and Live Loads E 2398 Standard Test Method for Water Capture and Media Retention or Geocomposite Drain Layers * E 2399 Maximum Media Density for Dead Load Analysis * E 2400 Selection, Installation and Maintenance Wednesday, September 9, 2009
  • 30. Building Codes Non-Occupied Green Roofs Occupied Green Roofs Section 1607.11.2.3 Section 1004.1.1 Landscaped Roofs Occupancy Loading Table Section 1611A Section 1009.11.1 Rain Loads Stairways & Roof Access Wednesday, September 9, 2009
  • 31. Building Permits for Green Roofs are Required Life Safety Issues Structural Issues Wednesday, September 9, 2009
  • 32. Wednesday, September 9, 2009
  • 33. Superlite Green Roof Non-occupied 3” extensive roof Live Loads snow, rain, wind, people, maintenance, machinery maintenance worker 20 psf Dead Loads green roof assembly 20 psf roof framing assembly 14 psf Total Dead & Live Loads 54 psf Green Roof Design Construction Wednesday, September 9, 2009
  • 34. Superlite Green Roof Residential occupied extensive roof Live Loads residential deck 40 psf Dead Loads 3” green roof assembly 20 psf stepping stones 6 psf roof framing assembly 14 psf Total Dead & Live Loads 80 psf Green Roof Design Construction Wednesday, September 9, 2009
  • 35. Superlite Green Roof Commercial occupied extensive roof Live Loads commercial deck 60 psf Dead Loads 3” green roof assembly 20 psf stepping stones 6 psf roof framing assembly 14 psf Total Dead & Live Loads 80 psf Green Roof Design Construction Wednesday, September 9, 2009
  • 36. First Order of Design Decisions Determine Type of Green Roof Extensive, Semi-Intensive or Intensive Degree of Accessibility Non Occupied or Occupied Determine Size of Occupancy Influences cost Wednesday, September 9, 2009
  • 37. Structural Issues Wednesday, September 9, 2009
  • 38. 1. Is this an extensive or an intensive green roof? Benefits Benefits looks good plus grows food low water plants saves energy grows larger plants collects storm water shallow deep 2”- 6” deep 6” and deeper Extensive Intensive Green Roof Design Construction Wednesday, September 9, 2009
  • 39. 2. occupied or non-occupied green roof? access plan view plan view 42” high guardrail required maintenance workers stair access ladder access fall protection provided fall protection training required OCCUPIED ROOF NON-OCCUPIED ROOF Green Roof Design Construction Wednesday, September 9, 2009
  • 40. 3. Can the structure support the loads ? 20 psf Landscaped Roof Live Loads 20.38 psf 3” Ultra Extensive Green Roof System Dead and Live Loads 13.85 psf Roof Membrane & Structure Dead Loads No Occupancy roof 54.23 psf 54.23 psf dead and live load sheer seismic vertical loads lateral loads Green Roof Design Construction Wednesday, September 9, 2009
  • 41. 4. Structural Retrofit No Occupancy sheer seismic vertical loads lateral loads Green Roof Design Construction Wednesday, September 9, 2009
  • 42. The possibilities ? 0 in 12 slope to 7 degrees water retention barrels Elevation Flat Roofs Class A Roof under Section Green Roof Design Construction Wednesday, September 9, 2009
  • 43. 1.5 in 12 slope 7 degrees water retention barrels Low Sloped Elevation Roofs 1.5 in 12 slope 7 degrees Truss Class A Roof under Section Green Roof Design Construction Wednesday, September 9, 2009
  • 44. vegetated 4 in 12 slope water retention barrels Elevation Sloped Roof geo-tech fabric Truss Class A Roof under Section Green Roof Design Construction Wednesday, September 9, 2009
  • 45. Typical structural failures Hire a structural engineer, don’t guess drainage failure ponding lateral support failure Structural Collapse Green Roof Design Construction Wednesday, September 9, 2009
  • 46. Roof Drainage Ponding in heavy rainfall is the concern Minimum slope = 1/4” / ft or 2% to drain roof plan ponding Roof Drains and Secondary Roof Overflows Rain Water Loads if Drain Clogs blocked roof drain R = 5.2 (ds + dh) roof drainage Secondary Overflow water retention barrels elevation Green Roof Design Construction Wednesday, September 9, 2009
  • 47. Drainage and overflow Green Roof Design Construction Wednesday, September 9, 2009
  • 48. Safety - Fall Protection CAL-OSHA Section 1926.501 Duty to Have Fall Protection >15’ high Section 1926.503 Fall Protection Training Required plan view You are required to have Fall Protection maintenance workers Training and ladder access insurance for all maintenance fall protection training required workers NON-OCCUPIED ROOF Green Roof Design Construction Wednesday, September 9, 2009
  • 49. Safety - Fall Protection access plan view 42” high guardrail required stair access fall protection provided OCCUPIED ROOF Green Roof Design Construction Wednesday, September 9, 2009
  • 50. Fire Protection “Class A” UL rating maintained Determine fire risk zone City or County of San Diego SPRI Single Ply Roofing Industry Fire Design Standards for Green Roofs elevation 18” 18” - 36” non vegetated boundary succulent plant pallet ( avoid grasses ) irrigation plan Green Roof Design and Construction Wednesday, September 9, 2009
  • 51. Fire Protection drought tolerant sedum irrigation system 18” non vegetated boundary Class “A” roof assembly Green Roof Design and Construction Wednesday, September 9, 2009
  • 52. Maintenance Manual Operations Plan plan view Fall Protection Plan maintenance workers ladder access Fall Protection Training fall protection training required NON-OCCUPIED ROOF Green Roof Design Construction Wednesday, September 9, 2009
  • 53. GREEN ROOF CONSTRUCTION CASE STUDY Wednesday, September 9, 2009
  • 54. Re-roof - maintain existing 1 hr Class Roof A Green Roof Construction 101 Wednesday, September 9, 2009
  • 55. TPO membrane 60 mil Green Roof Construction 101 Wednesday, September 9, 2009
  • 56. CCW MiraDRAIN GR9200 drainage board (black) CCW 200 moisture retention mat (gray) Wednesday, September 9, 2009
  • 57. Green Roof Construction 101 Wednesday, September 9, 2009
  • 58. Wednesday, September 9, 2009
  • 59. GREEN ROOF COSTS and BENEFITS Wednesday, September 9, 2009
  • 60. CLIENT NAME GREEN ROOF COSTS ADDRESS TELEPHONE GREEN ROOF TEMPLATE <5000 SQ FT COST UNIT AREA SCOPE OF WORK REROOF / TEAR OFF $ 3,736.00 $ 2.00 1868 2" RIGID INSULATION AS REQUIRED $ 3,269.00 $ 1.75 1868 TPO 60 mil MEMBRANE $ 14,944.00 $ 8.00 1868 3" ULTRA EXTENSIVE SYSTEM $ 41,096.00 $ 22.00 1868 SUBTOTAL $ 63,045.00 STRUCTURAL ENGINEER / PLANS $ 3,736.00 $ 2.00 1868 ARCHITECT $ - 1868 PERMIT $ 1,868.00 $ 1.00 1868 TOTAL COST $ 68,649.00 $ 36.75 1868 NIC - STRUCTURAL RETROFIT Wednesday, September 9, 2009
  • 61. Benefits Wednesday, September 9, 2009
  • 62. Wednesday, September 9, 2009
  • 63. Green Roofs and Graywater Wednesday, September 9, 2009
  • 64. Wednesday, September 9, 2009
  • 65. SUSTAINABILITY Wednesday, September 9, 2009
  • 66. Restorative Design Sustainable Design = neutral, 100% less bad Wednesday, September 9, 2009
  • 67. Wednesday, September 9, 2009
  • 68. GREEN ROOF PLANTS Wednesday, September 9, 2009
  • 69. Wednesday, September 9, 2009
  • 70. David Solmes, Landscape Architect Paul Kephart, Rana Creek Plants Wednesday, September 9, 2009
  • 71. PLANT LIST #1 California Nativies dudleya pulverulenta dudleya edulis senecio serpens Chalk Dudleya blue chalk iceplant senecio serpens Plants Wednesday, September 9, 2009
  • 72. Green Roofs in Arid Climates Wednesday, September 9, 2009
  • 73. prickly pear opuntia littoralis nassella cernua nodding neddlegrass onion grass melica imperfecta blue eyed grass sisyrinchium bellum Plants Wednesday, September 9, 2009
  • 74. desert mallow sphaeralgea ambigua cliff spurge euphorbia misera purple three awn red skin onion silver wormwood desert marigold allium haematochiton artemisia ludoviciana baileya multiradiata Plants Wednesday, September 9, 2009
  • 75. golden yarrow sunrose beach primrose eriophyllum confertiflorum helianthemum scoparium camissonia cheiranthifolia achillea millefolium common yarrow California aster lessingia filaginifolia Plants common yarrow Wednesday, September 9, 2009
  • 76. GREEN BUILDING PROGRAMS Wednesday, September 9, 2009
  • 77. LEED Leadership in Energy and Environmental Design SUSTAINABLE SITES STORMWATER DESIGN ENERGY AND ATMOSPHERE Wednesday, September 9, 2009
  • 78. Green Roof Resources Green Roofs for Healthy Cities Wednesday, September 9, 2009
  • 79. Note: This is not a complete program Robert Thiele, Architect A.I.A. LEED AP Wednesday, September 9, 2009
  • 80. Wednesday, September 9, 2009
  • 81. Wednesday, September 9, 2009
  • 82. Wednesday, September 9, 2009
  • 83. Wednesday, September 9, 2009
  • 84. Wednesday, September 9, 2009
  • 85. Wednesday, September 9, 2009
  • 86. Wednesday, September 9, 2009