The American Society of Landscape Architects builds a green roof for others to emulateGreenroofs are much less common in America than they are in Europe. So, inthe hope that it can serve as vehicle for change and make green roofsmore commonplace in America, the American Society of LandscapeArchitects built an inventive green roof on their Washington DCheadquarters that will make even European’s envious. Designed by Boston-based landscape architect, Michael Van Valkenburghand Associates, the 3300 sq ft roof is replete with diverse plantingsand surface materials. It even has its own topography. At the entrance to the roof, Van Valkenburgh has created two elevated“waves” formed by rigid insulation and covered with a green roofsystem. While these forms provide visual interest they also serve themore practical function of hiding the building’s HVAC units.Surrounding the waves is a green roof system with aluminum grating thatallows visitors to walk on the roof without damaging it. Chairs andtables are placed to encourage visitors to make the journey up.
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