Skip to main content

Resource Center

About American Hydrotech
Not logged in. Login

Project Details

American Society of Landscape Architects Headquarters

Location: Washington , DC
Completion Date: 2006
Size: 3,800 sqft.
Market Sector: Office
Renovation:Yes

Project Team

Owner: American Society of Landscape Architects
Architect: DMJM Design
Landscape Designer: Michael Van Valkenburgh Associates, Inc.
Contractor: Forrester Construction Company

Product Info

Garden Roof Type: Mixed
Garden Roof Size: 3,800 sqft.
Products: Slope, GardNet

Award Winning

Awards Won: 2010 Green Roofs for Healthy Cities Award of Excellence - Intensive Institutional Category

Additional Details

When the American Society of Landscape Architects (ASLA) wanted a high profile location to best demonstrate how landscape architects play a central role in green roof design and construction, it needed to look no further than a top its own headquarters building. And, when ASLA wanted an engineered assembly that would allow it to show how environmental and aesthetic benefits of a green roof can best be maximized, it needed to look no further than the Garden Roof® Assembly from American Hydrotech.


The previous black tar surfaced roof of the ASLA headquarters building in Washington, DC, is now a landmark demonstration project, containing six distinct Garden Roof conditions, representing extensive, semi-intensive, and intensive systems ranging in growing media depths of 3 - 18 inches. Two “waves” dominate the design and allow for the greatest green coverage possible for the 3,800 square-foot roof surface. Surrounding these is a third green roof system, covered by metal grating that allows visitors to walk over the planted material. The Garden Roof Assembly plays an integral and essential role in the roof’s design.


"We chose this assembly because of its stormwater management capabilities as well as its ability to improve the building’s energy efficiency,” Nancy Somerville, executive vice president and CEO of ASLA, said of ASLA’s decision to go with the Garden Roof Assembly. “American Hydrotech lends a great deal of technical expertise to its projects and provides an outstanding warranty.”


MM6125®EV-FR, a seamless waterproofing/roofing membrane is protecting the integrity of the overstructure. And, to effectively confine and stabilize the growing media on the sloped “waves” GardNet™ was installed. This unique component of the Garden Roof Assembly allows design professionals to expand beyond traditional flat roof applications, up to a 7:12 roof pitch.

Additional Office Projects

Madison Plaza
Madison Plaza
901 Cherry Avenue (The Gap)
901 Cherry Avenue (The Gap)
NorthPark 400
NorthPark 400
Zlote Tarasy
Zlote Tarasy
Pacific Bell Administration Office Complex
Pacific Bell Administration Office Complex
Proctor & Gamble Headquarters
Proctor & Gamble Headquarters
Pennzoil Place
Pennzoil Place
Canary Wharf (Multiple Buildings)
Canary Wharf (Multiple Buildings)
601 Congress
601 Congress
550 West Adams
550 West Adams
555 W. Monroe Street
555 W. Monroe Street
2000 Avenue of the Stars
2000 Avenue of the Stars
AT&T Corporate Center
AT&T Corporate Center
Gates Foundation Campus
Gates Foundation Campus
Royal Bank of Scotland
Royal Bank of Scotland
Gap, Inc. Headquarters
Gap, Inc. Headquarters
Lowe's Corporate Headquarters
Lowe's Corporate Headquarters
One Bryant Park (Bank of America)
One Bryant Park (Bank of America)
Sears Tower Renovation (now Willis Tower)
Sears Tower Renovation (now Willis Tower)
Russell Investments Center
Russell Investments Center
Morton International Building
Morton International Building
Johns-Manville World Headquarters
Johns-Manville World Headquarters
Project Honor - SC Johnson Tribute Building
Project Honor - SC Johnson Tribute Building
Greenway Plaza
Greenway Plaza
American Society of Landscape Architects Headquarters
American Society of Landscape Architects Headquarters
World Wide Fund for Nature Headquarters
World Wide Fund for Nature Headquarters
TWA Corporate Headquarters Building
TWA Corporate Headquarters Building
Lake Ridge Square
Lake Ridge Square
Bow Valley Square
Bow Valley Square
Centennial Place
Centennial Place
Center for Sustainable Development
Center for Sustainable Development
Corus Entertainment Building
Corus Entertainment Building
MCI WorldCom Network Information Center
MCI WorldCom Network Information Center
Raleigh Convention Center
Raleigh Convention Center
SAS Corporate Headquarters
SAS Corporate Headquarters
SSQ Tower
SSQ Tower
564 Beatty Street
564 Beatty Street