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Raleigh Roofing: Article About Cool Roofs Are Gaining Popularity

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Just a few years ago, most people didn't want to put cool roofs on their homes because the shingles on these energy-efficient roofs had to be white to reflect sunlight. Many neighborhoods didn't allow people to make additions to their homes that clashed with the style of the rest of the neighborhood, and living in a house with a big, white roof just wasn't very popular. The consequence was that all the homes in a neighborhood had heat-absorbing black roofs that caused a phenomenon known as the urban heat island effect, which makes the local temperatures hotter than surrounding areas. In the summertime, all the homeowners in the neighborhood had higher cooling bills because of this effect, and the cost of air conditioning was made even higher by the extreme rooftop temperatures caused by the heat-absorbing roof materials.

Traditional asphalt, wood and metal roof materials can get to 150 degrees during the hottest parts of the summer, and conduction brings these temperatures into the home through the attic and top-floor rooms. A Raleigh roofing specialist should be able to explain all the modern cool roof options available, including dark-colored roof materials that conform to neighborhood codes. These materials can bring down roof temperatures by up to 15 percent, reducing cooling costs for individual homes as well as entire neighborhoods that adopt the energy-efficient approach.

The roofing experts at Otto's Exteriors of Raleigh NC can assist you with any questions regarding shingle roofing or metal roofing.

The U.S. Department of Energy works together with the Cool Roof Rating Council to rate and recommend cool roof materials so homeowners can follow a simple guide to picking out shingles. The government's Energy Star program recommends cool roofs that reduce energy costs by at least 10 percent, and the CRRC provides two ratings that measure how well a roof reduces heat. The first rating measures solar reflectance, or the amount of solar radiation reflected away by the roof. The second rating measures thermal emittance, or the amount of heat released from the roof after it's been absorbed by the shingles. Both of these ratings have a value between zero and one, with values closer to one being more efficient.

The CRRC is an independent organization that provides these ratings so that agencies, such as the Environmental Protection Agency and the Department of Energy, can help homeowners understand their options and make recommendations. The Energy Star program is an initiative of the EPA and was commissioned by Congress in the 1990s to help consumers pick out the most energy-efficient products and appliances, reducing energy costs and protecting the environment.

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