Green Roofs on the Rise! September 12, 2013 Jordan Richie, GRP Director, Education and Accreditation Green Roofs for Healthy Cities
ABOUT GRHC Member-based non-profit industry association established in 1999. Big Sur Award of Excellence 2009 Winner: Fred Ballerini Phoenix Convention Center Phoenix, AZ Award of Excellence 2011 Winner: Ten Eyck Landscape Architects, Inc. Mission To increase the awareness of the economic, social and environmental benefits of green roofs and green walls, and other forms of living architecture in North America through education, advocacy, professional development and celebrations of excellence.
EDUCATION AND ACCREDITATION Green Roof Professional (GRP) Accreditation Program Integrated Water Management training series Green Walls 101 Living Architecture and Sustainable Energy Rooftop Urban Agriculture Advanced Green Roof Maintenance Ecological Green Roof Design [NEW COURSE MANUAL IMAGE TK]
UPCOMING EVENTS Toronto Green Roof Boot Camp September 19 th to 21 st Three full-day courses Guest speakers Project tours Earn continuing education credits For more info and to register: www.greenroofs.org/education ESRI Canada Toronto, ON Award of Excellence 2010 Winner: Scott Torrance Landscape Architect Inc.
OUR ACTIVITIES: CONFERENCES Policy, Design & Case Studies, and Research presentation tracks Trade show GRP and specialized half-day training courses Awards of Excellence ceremony Green roof and wall tours Student design charrette www.citiesalive.org A Conference on the Economics of Green Infrastructure Interactive engagement-streams led by industry leaders, designed for learning and knowledge exchange Trade show & product exhibits Professional development training Green infrastructure tours www.greytogreenconference.org
OVERVIEW OF GREEN ROOFS Definition a.k.a. vegetated roof, living roof, garden roof, eco-roof A green roof is a contained green space on top of a human-made structure below, above, or at grade. Nathan Phillips Square Podium Green Roof Toronto, ON Award of Excellence 2011 Winner: PLANT Architect Inc. & Perkins+Will Canada Source: PLANT Architect Inc.
Square Footage Installed Per Year GROWTH IN NORTH AMERICA 1960s West Germany 1989 1 million m 2 Stimuli: legislation, regulation, incentives Strong growth rates over the past decade in North America 24% more green roof area installed in 2012 vs. 2011 Leading cities are Washington, Chicago, New York, Toronto Estimated Growth of the North American Green Roof Industry 25,000,000 20,000,000 15,000,000 10,000,000 5,000,000 0 2004 2005 2006 2007 2008 2009 2010 2011 2012 Year
GREEN ROOF BENEFITS Stormwater management Energy efficiency and urban heat island reduction Improved air quality Increased biodiversity Aesthetic improvement New amenity spaces Increased property values and marketing opportunities Educational opportunities
STORMWATER MANAGEMENT Source: US Environmental Protection Agency Source: West Virginia Department of Environmental protection (with artist s permission)
GREEN ROOF BYLAWS AND INCENTIVES Toronto Eco-Roof Incentive Program $75 per square meter New and retrofit projects Toronto Green Roof Bylaw Requires green roofs on new commercial, institutional and residential over 2,000 m 2 Nathan Phillips Square, Toronto 2011 Award of Excellence Winner (Extensive Institutional)
GREEN ROOF CATEGORIES Extensive Semi-intensive Intensive Halifax Seaport Farmer s Market Halifax NS Award of Excellence 2012 Winner: Lydon Lynch Architects Mill Valley Hillside Mill Valley, CA Award of Excellence 2010 Winner: McGlashan Architecture Macallen Building Condominiums Boston, MA Award of Excellence 2009 Winner: Landworks Studio, Inc.
GREEN ROOF COMPONENTS Green roof cross-section
GROWING MEDIUM Green roof growing medium is made up of four components: Mineral or inorganic material (a.k.a. aggregate) Expanded slate, clay, shale, vermiculite, volcanic rock, coarse sands, pumice stone, scoria, zeolite, diatomaceous earth, perlite, crushed roofing tile, and rock wool. Organic material (usually compost) Straw, saw dust, wood, grass, leaves, clippings, agricultural waste, worm castings, peat or peat moss, and manures. Water Air
GROWING MEDIA COMPONENTS Close-up: Expanded slate Source: Chuck Friedrich, Carolina Statlite Company Close-up: root establishment in growing medium Source: Rooflite
GROWING MEDIA COMPONENTS Source (l r): Rooflite Source: Chuck Friedrich, Caroline Stalite
FILTER FABRIC 1 2 Source : (top right) Tremco; (left; bottom) Kerry Ross 3 4
GREEN ROOF GROWING MEDIA Example of a manufacturer s criteria for compost in green roof growing media: The finer the better, but not dusty Maximum particle size less than 12.5 mm ph below 7 and above 5.5 No bio-solids Lower in phosphorous levels
GREEN ROOF GROWING MEDIA What do green roof growing media providers look for when sourcing compost: Maturity of supply Consistency of feedstock Seal of Testing Assurance (STA) Program or Compost Quality Alliance (CQA) participant
GROWING MEDIA TESTING J.C. Raulston Arboretum Raleigh, NC Source: Chuck Friedrich, Carolina Stalite
ROOFTOP URBAN AGRICULTURE Brooklyn Grange Navy Yard Farm
QUESTIONS? Halifax Seaport Farmer s Market 2012 Award of Excellence Winner (Extensive Commercial/Industrial)
UPCOMING EVENTS Toronto Green Roof Boot Camp September 19 th to 21 st Three full-day courses Guest speakers Project tours Earn continuing education credits For more info and to register: www.greenroofs.org/education ESRI Canada Toronto, ON Award of Excellence 2010 Winner: Scott Torrance Landscape Architect Inc.