When temperatures peak, air conditioners work overtime. According to real estate developer Marcus Hiles, traditional roofing insulation is the culprit to blame for this. A home’s roof takes in the sun’s radiant energy, heating the attic and air ducts and increasing cooling costs. Hiles has determined that highly reflective radiant barrier roof panels installed in the attic will instead reflect the heat, reducing heat transfer from the roof’s underside up to 97 percent. “This cheap trick will keep your attic up to 30 degrees cooler,” he says.

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