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Adding Value with Green Roofs by Kirstin Weeks
1. Adding Value with Green Roofs
Kirstin Weeks, Arup
Green Roof Professional, LEED AP, CEM
1
2. Sir Ove Arup founded his practice in 1946 based
on a belief in ‘total architecture’
integration and interdependence, innovation and
the social purpose of design.
We shape a better world.
9. Benefits and Uses of Green Roofs
Stormwater Management
Roof Longevity
Habitat and Biodiversity
Building Energy Savings,
Improved PV Production
Urban Agriculture
Acoustic Insulation
Air Quality Improvement
Aesthetics and Quality of Life
Job Generation
Urban Heat Island Reduction
Accessible Open Space
Property Value Increase
$
10.
11. Stormwater Performance
• Retains 30% - 100% over the duration of a
storm (up to 3.5”)
• Reduces runoff rate by up to 85% (avg 65%)
• Deeper soil, low slope, retention features and
large roofs improve performance.
12. Heat Island & Energy
• Annual energy savings ~$0.17 per square foot
of roof (varies widely by climate and building
characteristics)
• Community wide energy and peak load
reduction
13. Biodiversity and Habitat
• Governments developing ways to value
natural ecosystems, i.e., Australia’s
BushBroker scheme ($0.42 - $1.46/sf)
16. Quality of Life and Real Estate
• A study showed that access to views of greenery has
increased productivity 2.9%
• Potential real estate value of ~$13 per square foot national
(rents, expenses, vacancy, discount rates, absorption and
lease lengths)
• Green roofs increase premiums of a building (i.e., green
buildings) - ~2.5% nationally
31. Contact Info and Links
Kirstin Weeks, Arup
560 Mission Street, Seventh Floor
San Francisco, CA 94105
direct 415 946 0746
mobile 415 730 6444
kirstin.weeks@arup.com
GSA Report Link: http://www.gsa.gov/portal/category/104999
SPUR Roadmap for SF: www.spur.orggreenroofs