The City and County of San Francisco‘s Real Estate Department(RED) working in partnership with the San Francisco Department of the Environment, and the Department of Public Works designed and installed a living, vegetated (green) roof at One South Van Ness, as part of a larger roof replacement program.
The living roof at One South Van Ness percolates storm water, reduces peak runoff, reduces cooling loads and energy use within the building, provides a suitable habitat for butterflies & honey bees, and a beautiful park-like view from neighboring buildings. The living roof is 9,500 square foot and captures, stores, and delivers rainwater for irrigation via a 6,500 gallon tank and pump system; which will help reduce the use of potable water during the summer or dry months. The plants on the living roof include a variety of California native and adopted plants including Buckwheat, Stonecrop, Tufted Hair Grass and San Bruno Mountain Manzanita. In addition to the greenery and environmental benefits, the project team prioritized the reuse of roofing and insulation materials. River rock ballasts were reused around the edges of the living roof, provided by the Park and Recreation Department, and the pathways were made out of existing concrete roof pavers. The living roof was designed with consultant Rana Creek Living Architecture, the designer of the living roof at the California Academy of Sciences.
Click on the link for a time-lapse video taken during the construction process showing 10 months work in 2 ½ minutes.
Location
One South Van Ness Avenue
Schedule
Construction completed October 2010
Cost/Funding
Living Roof Cost: $400,000. Total Construction Cost: $3 million. Funding for this project was provided by the Real Estate Division, under the General Services Agency.
Project Team
Bureau of Architecture (BOA)
Bureau of Engineering (BOE)
Bureau of Construction Management (BCM)
Real Estate Division (RED)
Contractor
Western Roofing
Green Building
The installation of the green roof at One South Van Ness will help the building obtain and become LEED (Leadership in Energy and Environmental Design) certified.
Contact
Glenn Hunt, Architect
glenn.hunt@sfdpw.org
(415)557-4782
