Santa Rosa Beach Roofing: Article About Solar Radiation
Dark colored roofs absorb a lot of heat from the sun's radiation. Roofing materials transfer this heat through conduction. The outcome is hot air trapped in attics that acts very much like an oven, transferring heat to attics and interior living spaces. Even lighter colored roofing materials experience this problem, especially in warm, sunny climates. Higher utility bills result as cooling systems are forced to work harder to maintain an adequate comfort level. Santa Rosa Beach roofing companies offer an easy way to offset some of that heat gain with radiant barrier insulation.
Radiant barriers made from aluminum, resemble the aluminum foil found in a kitchen, except it is much stronger. Another type of radiant barrier, radiant paint, combines latex paint with powdered aluminum. Both types come under the category of reflective insulation systems. The heavy duty foil type of radiant barrier reflects nearly 100 percent of the radiant heat. The paint type or radiant barrier is less efficient, reflecting about 75 percent. The extra efficiency of foil types comes from the installation method. Paint is simply sprayed on the inside surface of a roof, preventing the creation of the air space that foil types form when attached to the bottom of rafters.
Reflective foil occasionally finds use between floors and crawl spaces, but only after attics receive attention.
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Used for floors, the barriers reflect heated air back into living spaces. The property of heat that causes it to rise negates the advantage in this application.
Garages with uninsulated ceilings represent an ideal opportunity for both types of radiant barrier, followed by attics. Installation is simple, especially for garages with open ceilings. Cathedral ceilings present an obstacle, unless radiant barrier installation takes places during construction. Garages that do have finished ceilings require the same amount of labor as most attics, but uninsulated garages frequently get very hot over the course of a day. Air temperatures in garages can easily exceed those of interior spaces by 40 degrees or more. That high temperature air transfers its heat to living spaces attached to the garage and continues to do so long after the sun goes down, especially in second story bedrooms extending partially over a garage.
From a financial perspective, radiant barriers make good sense. The initial cost remains fixed, unlike energy costs, which continuously increase. Once installed a radiant barrier will seldom need maintenance of any kind unless punctured. Even then, simple repairs restore them to peak effectiveness and provide energy savings for the life of the home.