Cool Roofs

Approximately $40 billion is spent annually in the United States to cool buildings, one-sixth of all energy consumed annually. Black and dark-colored roofing materials can dramatically increase a building's cooling load. Energy-efficient roofing systems, also called cool roofs, can reduce roof temperature by as much as 100°F during the summer, and thereby reduce the building's energy requirements for air conditioning. Cool roofs reflect the sun's radiant energy before it penetrates the interior of the building.27 In fact, keeping the building roof cool helps reduce the urban heat-island effect, in which cities are markedly (4°F to 8°F) warmer than the surrounding countryside, leading to greater use of energy for summertime air conditioning.

Cool roofs provide a number of potential immediate and long-term benefits to building owners, including lower utility bills for air condition

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