News & Events

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

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. The new portal features information on urban vegetation, cool roofs and cool pavements on The website also includes information for individuals to learn more about what are and how to install cool roofs. 

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

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.

HIG researchers uncover potential for cool roofs in Chinese cities

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." Their work characterizes the potential for heat island mitigation, energy use, energy cost, and ambient air quality as a result of replacing dark gray roofs with aged white roofs in seven Chinese cities.

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

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 simple tools he has been able to influence state and national energy policy over the years. But for now they stay tucked away as he enjoys the scenery. "I get a pretty good view of San Francisco," Rosenfeld says.

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

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 International Energy Conservation Code, and California’s Title 24, not to mention LEED. The concept even has its own bill in the U.S.

EPA's webinar: Keeping Your Cool: How Communities Across the Country are Reducing the Heat Island Effect

June 18, 2014

EPA's Heat Island Reduction Program invites you to join our webcast on June 26, 2014 ; please see the details below.

Keeping Your Cool: How Communities Across the Country are Reducing the Heat Island Effect

Heat Island Group researcher Rosado takes 2nd place in Big Ideas@Berkeley competition

May 12, 2014

BERKELEY — Every year, thousands of students come to Berkeley with vague ambitions to change the world. The annual Big Ideas@Berkeley competition is inspiring some of them to do just that — by launching globally life-changing innovations even before they graduate.

Early bird registration now open for the International Roof Coatings Conference (IRCC)

April 07, 2014

The Roof Coatings Manufacturers Association (RCMA) has opened early bird registration for the International Roof Coatings Conference (IRCC). The IRCC will take place at the Royal Sonesta Harbor Court Hotel in Baltimore, Maryland on July 14-17, 2014. This conference will highlight the latest technological advancements and emerging issues of relevance to the roof coating, building envelope, green building, cool roofing, research, and architectural communities.

Heat Island Group's Mandel responds to EPDM Roofing Association's critical analysis of research

April 06, 2014

In light of recent criticism of a study authored by several Heat Island Group researchers by the EPDM Roofing Association, the Heat Island Group's Benjamin Mandel (a coauthor of the study) has submitted a response to Today's Facility Manager.

EETD's Stephen Selkowitz is Engineering News-Record's 2014 Award of Excellence Recipient

April 03, 2014

The editors of Engineering News-Record magazine have given Stephen Selkowitz is the 2014 Award of Excellence "for relentlessly working to reduce the carbon footprint of buildings and for moving the nation toward better building performance, as well as for being the master of commercializing energy-efficient building technologies and the mastermind of FLEXLAB®," the Facility for Low-Energy eXperiments in Buildings located at Berkeley Lab.

Stephen Selkowitz

New Heat Island Group research compares economics of white, green, and black flat roofs in the United States

January 19, 2014

Looking strictly at the economic costs and benefits of three different roof types—black, white and "green" (or vegetated)—Lawrence Berkeley National Laboratory (Berkeley Lab) researchers have found in a new study that white roofs are the most cost-effective over a 50-year time span.

The Heat Island Group begins the year with two new publications

January 14, 2014

Two new papers to be published in early 2014 showcase recent Heat Island Group research efforts to improve the measurement and prediction of roofing albedo.

Green Light New York Releases Living Lab RFI

January 08, 2014

Green Light New York and Lawrence Berkeley National Laboratory have partnered to develop a pair of "Living Lab" demonstration projects that will deploy innovative lighting, daylighting and shading systems in working New York City office spaces. The team has secured the participation of two Fortune 100 companies, each of which have committed to using an individual floor of their flagship NYC buildings as test beds for high performance systems.

Looking south over lower New York City.

Cooling Los Angeles, from the roof down (A|N blog)

December 31, 2013

What's the coolest place in Los Angeles? It may be right over your head. Starting in 2014, thanks to an update of the Municipal Building Code, all new or refurbished buildings will be equipped with "cool roofs." A cool roof is built of reflective rather than absorptive material. Compared to traditional roofs, cool roofs can be as much as 50 degrees cooler on the roof surface, and can lower interior building temperatures by several degrees.

IEA's Technology Roadmap for Energy Efficient Building Envelopes features cool roofing

December 16, 2013