NYC °CoolRoofs, an initiative of NYC Service and Department of Buildings, encourages building owners to cool their rooftops with a white reflective coating that reduces energy consumption, cooling costs and carbon emissions. Utilizing the power of volunteers, NYC°CoolRoofs aims to coat 1 million square feet of rooftop each season. The program supports New York City’s goal to reduce greenhouse gas emissions by 30% by 2030. A cool roof has a highly reflective surface, typically white, and releases heat quickly. Roofs are often coated with either a paint-like coating which is rolled or sprayed onto flat roofs, or covered with a white rooftop membrane. Both materials are durable and easily installed without disruption to daily operations.

Save money. Cool roofs can reduce air conditioning costs by 10% to 30% on hot summer days when air conditioning accounts for up to 40% of daily electricity use. Cool roofs can reduce internal building temperatures up to 30%.

Preserve roof structure and cooling equipment. Because cool roofs don’t reach such high temperatures, the thermal shock stress associated with large temperature changes is reduced, thereby prolonging the life of cooling equipment and limiting a roof’s expansion and contraction that results from those temperature changes.

Reduce energy usage. By decreasing summertime peak energy demand, cool roofs help reduce utility grid stress and thus the likelihood of power outages.

Reduce carbon emissions. Cool roofs reduce carbon emissions in New York City at a rate of 0.5 lbs. per square foot of rooftop coated. NYC °Cool5oofs has coated 3.6 million square feet of rooftop, a reduction of 815 metric tons of carbon.

Combat the urban heat island effect. Because cities like New York have greater amounts of dark surfaces, city temperatures are five to seven degrees warmer than surrounding areas on an average summer day. Coating all eligible dark rooftops in New York City could result in up to a 1 degree reduction of ambient air temperature.

Benefits of Cool Roofs

Since NYC °CoolRoofs’ launch in 2010, more than 4,000 volunteers have coated over 3.6 million square feet of rooftop across 415 buildings. NYC °CoolRoofs promotes building owners to cool their own roofs. For more information on how to cool your rooftop, visit nyc.gov/coolroofs and read our ˚Cool It Yourself guide.

 

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