A mix of sedums, fescues, wildflowers, perennials and ornamental grasses resemble an open meadow atop the Multnomah County Building. The green roof, winner of a People’s Choice Award, is highlighted by a public viewing area with interpretation boards describing the design, construction process and environmental benefits.
Portland’s historic downtown library is now a “green building”. We began by conducting a feasibility evaluation on tray and unit type green roof construction products. Our final design for the green roof included a 3-inch thick tray system with built-in irrigation. The plant palette included a variety of extremely drought tolerant sedums.