Recent News & Events

New “Cool Roof Time Machine” Will Accelerate Cool Roof Deployment

Tuesday, April 14, 2015
Standards body approves Berkeley Lab’s method to mimic natural soiling of roofing materials.

Cool roofs can help keep buildings cool, thus lowering the building’s energy use, while also mitigating the urban heat island effect by reflecting sunlight

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Sharon Chen sprays roofing material with soiling mixture.

HIG scientist, Ronnen Levinson, featured in new video describing cool roofs as one of the Lab's 8 Big Ideas

Wednesday, November 19, 2014

Berkeley Lab scientists, including the Heat Island Group's Dr. Ronnen Levinson, each presented one of the Lab's 8 Big Ideas in front of a packed house in Oakland, CA on 8 October, 2014. His presentation, "Cool Roofs through Time and Space", featured 

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USA TODAY cites California's cool pavements bill (AB296) as leading example of nation's best climate preparedness

Tuesday, October 7, 2014

California has completed the highest number of goals to prepare for climate change, followed by Massachusetts and New York, according to a first-of-its-kind 50-state tracking tool unveiled Thursday.

In the last five years, there's been a burst

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HIG members use aerial imagery to map roof albedo across entire cities

Saturday, September 27, 2014

How cool is your roof? If you live in the California cities of Bakersfield, Long Beach, Los Angeles, San Francisco, or San Jose, you may be able to find out.

Scientists from the Department of Energy's Lawrence Berkeley National Laboratory (

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Ronnen Levinson discusses the new interactive rooftop reflectance map with Southern California Public Radio listeners

Saturday, September 27, 2014

Ronnen Levinson, Heat Island Group leader and staff scientist, was recently interviewed by Southern California Public Radio to discuss the new interactive rooftop reflectance map for California cities. 

You can view the article and listen to the

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Top 35 Global Innovator: George Ban-Weiss taps his creativity to distinguish himself academically and musically.

Wednesday, September 10, 2014

Whether playing fusion, bebop or modern jazz, bassist George Ban-Weiss loses himself in the passion, creativity and freedom of music, finding transcendence in his art.

His willingness to push boundaries has made him a much in-demand musician.

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The Heat Island Group developed a new web portal for local governments to learn more about Cool Communities on CoolCalifornia.org

Wednesday, September 10, 2014

The Heat Island Group, with support from the California Energy Commission and California Air Resources Board, developed a new web portal for local governments to learn more about the science and implementation of cool community strategies in California

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HIG researchers uncover potential for cool roofs in Chinese cities

Thursday, August 21, 2014

After three years of collaborative investigation, Ronnen Levinson and Jing Ge of LBNL's Heat Island Group co-authored a paper with Chinese researchers titled, "Cool roofs in China: Policy review, building simulations, and proof-of-concept experiments

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Cool roofs offer a salve for hot cities — and the climate, too

Sunday, June 29, 2014

From his office in the Berkeley hills, Art Rosenfeld looks out on the heart of California's Bay Area. The 87-year-old scientist keeps a pencil and a small notebook in his breast pocket, ready to jot down a quick note or make a calculation. With these

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Are cool roofs green? The answer's not black and white

Saturday, June 28, 2014

Cool roofs—those with reflectance and emissivity that make them good at keeping out the sun’s heat—are recommended widely without much regard for climate or project specifics. They’ve been adopted into multiple energy codes, including ASHRAE 90.1, the

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