Painting black tar roofs with a white, solar-reflective coating is a low cost, quick and tangible way to reduce the risk of power grid ‘brown-outs’, save millions of dollars in energy costs, and curb climate change. The statistics are as simple as they are staggering: A roof covered with solar-reflective white paint reflects up to 90% of sunlight as opposed to the 20% reflected by a traditional black roof. On a 90°F day, a black roof can be up to 180°F. That heat has a major impact on interior building temperature, potentially heating your room to between 115 – 125°F. A white roof stays a cool 100°F. Plus the inside of the building stays cooler than the air outdoors, around 80°F in this example, reducing cooling costs.
White roofs also reduce the “urban heat island” effect in which temperatures rise in dense urban areas because of the proliferation of heat-radiating, black tar surfaces. For example, the Urban Heat Island effect causes New York City to be about 5 degrees warmer than surrounding suburbs and accounts for 5 to 10 percent of summer electricity use.
In New York City alone, 12% of all surfaces are rooftops. It’s estimated that implementing a white roof program in 11 metropolitan cities could save the United States 7 gigawatts in energy usage. That’s the equivalent of turning off 14 power plants, and a cost savings of $750 million per year.
What’s more? There is already momentum behind white roofs. President Obama supports them, and the American Recovery and Reinvestment Act (stimulus) provides funding for green jobs including weatherization and initiatives like white roof painting that both create jobs and curb climate change.
So why isn’t every roof white? We’d like to know that too. You can help us fix the problem.
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Al Jazeera on White Roof Project
White Roof Project Mini-Documentary
DIY: How to Paint a Roof White
03.2013. | Take Part: Op-Ed: White Roofs Are the White Knight We Need to Slay Climate Change
07.2012. | Earth Easy: White Roofs Offer a Simple Strategy to Help Combat Global Warming
07.2012. | New York Times: So Cool! La Mama Theater in NYC Gets White Roofs
07.2012. | Times Square Magazine: The White Roof Project Aims to Cool the City’s Heat and the World’s
05.2012. | SPARK Speaker Series | Juan Carlos, Highlight
04.2012. | TEDX Seton Hall Talk | White Roof Project
01.2012. | Scienceline: Paint the town white, White Roof Project
07.2011. | Reuters: Painting Bill Clinton’s “white roofs” into reality, White Roof Project Op-Ed
08.2011 | Crain’s NY: 20 Manhattan roofs go green with coat of white
08.2011 | DNA Info: East Village Roofs Painted White To Keep Cool and Save Money
08.2011 | The Epoch Times: Volunteers Paint the Town White
08.2011 | FAB YouTube: White Roof Project and FABnyc launch Model Block with Scott Stringer
08.2011 | Reuters: Can We Crowdsource a Solution to Climate Change?
08.2011 | Inhabitat: Help the White Roof Project Paint the Rooftops of An Entire East Village Block
08.2011 | Re-Nest: A Cooler Planet, One Roof at a Time
07.2011 | The Daily Beast: Painting the Roof White
07.2011 | Reuters: Painting Bill Clinton’s “white roofs” into reality
07.2011 | Yes! Magazine: White Roofs Project Helps NYC Beat The Heat
07.2011 | Ecopreneurist: White Roof Project: Cools NYC One Roof At A Time
04.2011 | Be Social Change: NYC Be Social Changer of the Week, Juan Carlos Pineiro Escoriaza
10.2010 | Belgrave Trust: The White Roof Project: Curbing Climate Change in NYC, One Roof at a Time
09.2010 | So Fresh & So Green: Paint It White: Curbing Climate Change In The City
09.2010 | TreeHugger EarthKeepers: Clinton Global Initiative: Commitments for Positive Change
09.2010 | The Huffington Post: Going Green by Going White