"Today the Board of Supervisors unanimously approved Supervisor Scott Wiener’s legislation to create the country’s most comprehensive green roofs requirement. This legislation, which along with Supervisor Wiener’s previous solar roofs ordinance, creates a broad Better Roofs Program for new developments in San Francisco.
The new legislation builds on the existing solar requirement authored by Supervisor Wiener, which requires that at least 15% of new roofs in buildings up to 10 stories in height must have solar installed. The green roof option will allow developers to replace solar with green roof at a rate of 2 square feet of green roofs for every 1 square foot of solar. That means that instead of doing 15% of the roof area at solar, developers can do 30% of the roof area as green roofs, or, more likely a combination of the two.
“Green roofs are a major tool in our fight against climate change and to improve sustainability,” said Supervisor Wiener. “Our rooftops are a largely untapped resource that we need to put to work in our dense urban environment. Green roofs will make our air cleaner, our buildings more energy efficient, and our environment healthier. I’m proud that we are continuing to advance aggressive and innovative solutions to fight climate change in San Francisco and serve as a model for the entire country.”
"This fall, researchers at the Stevens Institute of Technology in Hoboken, New Jersey, are launching a “living laboratory” on the roof of a new campus building, with hopes of learning what types of green roofing materials work best.
The lab consists of various green roof setups, rain gardens and planters designed for optimal stormwater management called “bioretention” planters. The four planters are tricked out with soil sensors to monitor how much water, flowing out of a downspout, is captured by the “medium,” the mix of sand or soil that the plants take root in."
Love this idea.
Scott Weiner pushing this at the state level now 🙌
"Now, more than ever, California must lead on climate. In that spirit, today I’m introducing legislation to make California the first state in the nation to require solar panels on new buildings. Previously, as a member of the San Francisco Board of Supervisors, I authored similar solar legislation, making San Francisco the first large American city to adopt a solar rooftop requirement. The San Francisco legislation required installation of solar panels on the roofs of all new residential and commercial buildings between one and ten stories."
In a few weeks, the Trump Administration will take over Washington and bring with it a bevy of climate deniers — people in the pocket of…
Good news ... Supervisor Weiner proposed legislation that will add green roofs, also known as living roofs, as an option to meet existing solar mandate requirement, making San Francisco the first city in the country with a comprehensive solar and green roof requirement.
"France approved a law last week that requires the roofs of new commercial buildings be covered—at least in part—by either solar panels or plants."
Great PDF roadmap for green roofs in SF prepared by SPUR »
A local delegation reports on a recent visit to Switzerland to study the covering of thousands of buildings with living roofs. The Swiss model of green roofs is lighter, cheaper and richer in biodiversity than many American counterparts. How can we learn to develop a sustainable, affordable model to better reap the benefits of green roofs?
+ Laura Tam / SPUR
+ Mary Ellyn Johnson / Swissnex
+ Kay Cheng / San Francisco Planning Department
+ Lisa Lee Benjamin / EvoCatalyst
+ Jeff Joslin / San Francisco Planning Department
It's embarrassing that we have all this wasted space above our heads. Understanding that not every roof is reinforced properly, I think there should be a push for uses on roofs.