Stormwater Academy: Green Roofs

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Stormwater Academy Green Roofs

Green Roof Design and Operation (Part I) 2006
FSA Annual Conference June 14, 2006
By Marty Wanielista and Mike Hardin
FSA
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Appreciate the support of
UCF Team Marty Wanielista Martin Quigley Jeff
Sonne Clint Finstad Mike Hardin Kelley
Dragon Matt Kelly Jen McDaniel Natalie
Shaber Oscar Robayna Timir Shah Daniel
Broxson Pat Ryan Mikhal Moberg Bryan
Martin Ashley Fierro Rebecca Gallamore Karen
Adams

1. Eric Livingston, FDEP
2. Steve Iwinski, Applied Polymer Systems Inc.
3. Charlie Miller, Roofscapes, Inc
4. SchenkelShultz Architects
5. Burton Braswell Inc, Structural
6. UCF Student Government and students
7. Randy Jones, Hardin Construction Co.
8. Mark Towle, Big River Industries
9. Harvey Harper, ERD

1. Eric Livingston, FDEP
2. Steve Iwinski, Applied Polymer Systems Inc.
3. Charlie Miller, Roofscapes, Inc
4. SchenkelShultz Architects
5. Burton Braswell Inc, Structural
6. UCF Student Government and students
7. Hardin Construction Co.
8. Mark Towle, Big River Industries
9. Harvey Harper, ERD

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OUTLINE OF PRESENTATION Green Roofs

• PART I
• Introductions.
• Green roof basics.
• Benefits
• PART II
• Construction.
• Research as it affects design.
• The state of the industry - practical
  applications and practice.

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OUTLINE OF PRESENTATION Green Roofs

• PART III
• Type of Plants.
• Cost Considerations
• Maintenance.
• PART IV
• Additional Design Considerations.
• LEED Certification.
• Operation Effectiveness.
• The state of the industry - practical
  applications and practice.

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Some Definitions Green Roofs

What is a Green Roof? Covered with
vegetation Active - deep overburden roof
garden or recreation area Passive - thin
overburden no human access
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English Tea Time Green Roofs

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Stuttgart Germany About 60 Years
Over 30 of the roofs are green Photo of the
Mercedes Offices

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Also on Sloped Roofs plus14 of new flat roofs
in the last 5 years
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Active Green Roofs

Deep Growth Media to support deep rooted plant
systems
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Passive Green Roofs

Shallow growth media, note inclined roofs are
also used.
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A US Office View Green Roofs

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Chicagos Aggressive Program
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The New American Home for 2007
Expected completion in November 2006

Integrated bio-retention on the ground with
green roof areas on and at different levels of
the home. Also air conditioner condensate will
be recycled
Design based on post discharge less than pre
discharge or 4 inches of rainfall storage and 95
reuse
www.stormwater.ucf.edu
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Stormwater Academy Green Roofs

TYRONE, PA ROOF PLANTED JULY 2001
In 2005, 2.5 million square feet of green roofs
built in the US ( a 72 increase over last
year) Reference AECWorkForce May 9th 2006.
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Why are Green Roofs Popular in some areas

• Done for at least 30 years in some European
  and Japanese Cities.. an infrastructure..
• Surface Water Quality problems must be solved
• Construction permits are facilitated
• Density Bonus
• Reduction in yearly property taxes (tax credits)
• Additional Revenue stream from rentals
• Improve aesthetics of local community

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Why do Developers and Owners like them?
reduces potable water connection fee,
aesthetically pleasing, useful space, provide
for the highest use of land, reduce air
conditioning cost, lengthen roof life, about
2-3X, improve public image, increase
property value, helps with LEED
certification, reduce stormwater runoff
volume, or reduces land used for ponds.

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What are the values for regulatory and government
interests?

• Post equal Pre Volume and Pollution Control.
• Reduces the CO2 in the air while releasing O2..
• Also trap floating dust particles improving air
  quality.
• Can be part of an energy program because less
  energy is being used in a building.
• Neutralize the pH of acid rain.
• Reduce/meet TMDL standards
• Cistern
• Black Gold NuggetsTM
• Reduce the mass and concentration of pollution in
  stormwater runoff
• Cistern
• Black Gold NuggetsTM
• Easy to check the maintenance and operation.
• Can be used as part of a stormwater management
  program.

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Public Benefits

• Improved Stormwater Management
• Improved Air Quality
• Improved Aesthetics
• Environmental Education
• Job Creation
• Reduced Heat Island Effect
• Sustainability of materials and water (less
  potable water used for irrigation)

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Environmental Impact of Buildings

• 65.2 of total U.S. electricity consumption
• 30 of total U.S. greenhouse gas emissions
• 136 million tons of construction and demolition
  waste in the U.S. (approx. 2.8 lbs/person/day)
• 12 of potable water in the U.S.
• 40 (3 billion tons annually) of raw materials
  use globally
• Commercial and residential

Thus with a green roof, we can reduce electrical
consumption, green house gases, demolition waste
(extend roof life), potable water use and raw
materials.
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Private Benefits

• Increased Property Value.
• Extend Roof Life, thus Less Recurring Cost.
• Less Stormwater Treatment Costs.
• Energy Savings.
• Noise Reduction.
• Less Connection Fees and Water Charges.
• Health and Well Being.
• Higher Rental Rates, Faster Sales.
• Ability to reclaim land for revenue generating
  purposes

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Questions and Comments