The Roof Be Cool

A cool roof reflects most of the incident sunlight and emits some of the absorbed radiation back into the atmosphere instead of passing the heat on to the building below.

The roof be cool. Compared to the 30 solar reflectance of asphalt shingles that s a dramatic difference. A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. A cool roof prevents heat absorption by reflecting the sun s heat and then emitting its radiation back into the atmosphere.

Cool metal roofing is a popular cool roofing material as it can offer more than twice the solar reflectance of traditional asphalt roofing. In hot climates traditional roofs in the contiguous united states can reach temperatures of 150 to 185 degrees fahrenheit. By doing this cool roofs allow for a more comfortable and controlled indoor environment. A cool roof is a roof designed to maintain a lower surface temperature in bright sunshine than a traditional roof source.

As a result the roof stays cooler maintains a lower surface temperature keeping the building below at a cooler and more constant temperature. The surface of a cool roof reflects more sunlight and releases more heat than a so called hot or dark roof. A cool reflective roof stays 50 to 60 degrees cooler when exposed to the same summer heat.