Green Roofs - Living Architecture Monitor - Fall 2010 - (Page 22)

AWARDS OF EXCELLENCE SPECS CATEGORY: Intensive Institutional PROJECT: ASLA Headquarters Green Roof, Washington, District of Columbia, 3,000-square-feet, most recent planting April 2006 AWARD RECIPIENT: Conservation Design Forum, Elmhurst, Illinois (landscape architecture consultant & green roof design) Image courtesy ASLA CLIENT: American Society of Landscape Architects (ASLA) DESIGN TEAM: Project Lead, Landscape Architecture Michael Van Valkenburgh Associates Architect DMJM Structural Engineer Robert Sillman Associates General Contractor Forrester Construction A GREEN ROOF THAT WORKS WITH SPACE FOR YOGA CLASSES AND COCKTAIL PARTIES, STORMWATER MANAGEMENT, HVAC NOISE BUFFERING, REDUCED ENERGY DEMAND, RESEARCH FACILITY AND A LIVING CLASSROOM — THERE IS NO QUESTION THAT THIS GREEN ROOF DELIVERS ON ITS PROMISE AS A SHOWCASE OF MULTIPLE BENEFITS ompleted in spring 2006, the ASLA headquarters green roof was undertaken to demonstrate the environmental and aesthetic benefits of green roofs and to encourage more widespread use of green roofs. A retrofit project, the green roof replaced the original membrane roof on the 12-year-old headquarters building. One of the signature elements of the design is the use of two 25’-wide elevated “waves” formed by a structural skeleton filled with rigid insulation and covered with a green roof system. The waves rise to 6’2” and 5’4” above the walking surface, which positions flowering plants at eye level and creates an intimate, semi-enclosed space. The waves also effectively block the view of and noise from the building’s HVAC units, which were relocated as part of the project. The north wave cantilevers over one of the larger HVAC units. Another innovative feature of the design is the use of an aluminum grating walking surface over an extensive green roof system, which provides usable space and easy maintenance access while maximizing environmental benefits. Use of the grating increases the total greened area of the roof by 30 percent. The grating “floats” three inches above the soil surface. As the plants mature, they grow up through the grating. The action of walking on the grating trims the Sedums back to the height of the grating in high traffic areas, revealing circulation patterns. In addition to this being a retrofit and its unusual design, judges commented on the amount of research done on the plant palette and the fact that the roof is not only accessible, but is actually in frequent use for everything from yoga classes to tours to the public. This roof’s extensive multimedia educational component is critical, especially in its effort to “educate members of a profession who have an important role to play in green roofs,” demonstrating leadership on the part of the ASLA. To learn more about this green roof, please visit the COST: USD $117 per square foot/$350,000 total “ 22 USE OF THE GRATING INCREASES THE TOTAL GREENED AREA OF THE ROOF BY 30 PERCENT. LIVING ARCHITECTURE MONITOR FALL 2010 C

Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Fall 2010

Green Roofs - Living Architecture Monitor - Fall 2010
From the Founder - Urban Agriculture
Strata - T.O.’s New Green Roof Construction Standard
On the Roof With…Richard Conlin
Project - Farming for the City
Beekeeping - Diary of an Urban Apiarist
Exemplary Design - GRHC’s 2010 Awards of Excellence Winners
A Green Roof That Moves
Steeped in Ecological Design
Creating Community
A Model of Municipal Leadership
A Green Roof That Works
Like a Grassland Stream
Prairie in the City
Recycling Rainwater
Research - Increasing Urban Food Security With Extensive Green Roofs
Economic Valuation of a Rooftop Food Garden
Grhc Update - Macro-Scale Food Production
New Corporate Members
New GRPs
On Spec - Urban Agriculture — Hero or Hype?

Green Roofs - Living Architecture Monitor - Fall 2010