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Atlanta Roofing: Article About White Roof

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People have to do their part to protect the planet. For homeowners, this means reducing the amount of energy they use. One of the easiest ways for them to combat global climate change is to simply change the color of their roof. Atlanta roofing experts recommend that homeowners paint their roof white to achieve a positive impact on their power bill.

However, saying that painting a roof white will reduce the energy bill of a home is one thing; homeowners want to know why this is. If they were to step outside their house right now and look up at the roofs of homes in an urban area, they would notice that most of the roofs are black. This is a huge roofing flaw because black surfaces absorb heat. Over time, this starts to heat up the building itself, especially with homes that are located in the South.

To make matters worse, nearly everything else in urban areas are black too, including bridges, roads, sidewalks and parking lots. All of these elements absorb heat, which is why urban areas tend to be 15 to 20 degrees Fahrenheit hotter than suburban areas. This effect is often referred to as "hot spots.

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" While the rise in heat is annoying, it also has lasting consequences such as increased pollution, a strain on the power grid, breathing problems and a quicker deterioration of roofs.

In school, many people learned that black absorbs heat while white reflects it away. Some people even experience it when they get into a black car during the summer. These same principles can be applied to roofing. Experts say that a black tar roof can reach temperatures of 180 degrees Fahrenheit on a 90 degree day. In general, the roof may be twice as hot as the outside temperature because it's absorbing heat from the sun.

Roofers also say that the reflectivity of a surface is based completely on its solar reflective index. This rating is a measurement of the ability of a surface to not only reflect solar heat but to also emit what heat is absorbed. Black roofs have nearly no reflective properties. White roofs can reflect nearly 90 percent of the sun's solar rays and can emit 100 percent of the thermal energy absorbed.

The real question is: How does this help homeowners? First of all, it helps homeowners by saving them money on their cooling costs. If the roof isn't absorbing as much heat, the cooling unit doesn't have to work as hard to cool down the house. It also prevents the roofing materials from breading down as quickly and cracking. This means that the homeowners will have to deal with less leaks caused by the deterioration of their roof covering.

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