Completed this past October, the new living roof atop 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…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.
Cost of construction: $3 million over 10 months, compressed to under 3 minutes below:
∙ One South Van Ness Roof Replacement/Living Roof Project [sfdpw.org]