When homeowners refer to a cool roof, they are not talking about the visual aesthetics of it. Cool roofs are constructed with materials that help reflect the light from the sun and reduce the amount of heat that the material absorbs. By understanding what cool roofs are and how they work, you may be more inclined to get one for your home when you need roof replacement.

What Makes Your Roof Cool?

You should understand that a cool roof is not required to have a specific type of roofing material. It's a term used by the EPA to categorize roofing materials as Energy Star certified.

Cool roofing materials are often manufactured in a color that will reflect the light from the sun, much like how a white vehicle will stay cooler during the hot summer compared to a black vehicle. In addition to color, special pigments can be used that help reflects the infrared light from the sun. Infrared light is light that is invisible to humans, but contributes to causing surfaces to become hot. The pigment can allow darker colors to be reflective as well.

Low-Slope Roofing

You'll often see low-slope roofing on businesses since the flat surface doesn't need replacement to become a cool roof. An existing roof can be sprayed using a coating that will increase how reflecting the existing material is. It can be applied to metal, asphalt, or any other type of roofing material. In some situations, low-slope roofing is covered with a reflective material instead.

Steep-Slope Roofing

If the roof on a building is steep, such as a residential home, cool roofing can be accomplished using an alternative version of the traditional materials. For instance, an asphalt shingle that is designed to reflect the light from the sun or a metal roofing material that has the reflective pigments built into it. Since the reflective properties are built into the material, it requires that brand-new roofing material be installed to see the benefits.

What Makes Cool Roofing Desirable?

There are many reasons to have a cool roof. The biggest difference you'll see is reduced energy costs to cool your home in the hot summer weather. The inside of a home will feel more comfortable.

Cool roofing also combats the heat island effect in cities, by both reducing the surface temperature and reducing emissions caused by cooling a home. This also contributes to less pollution.

For more information on cool roofs, speak to a roofing contractor in your area or go to site.