Is there a significant difference in heat absorption between light and dark roof colors?
Ruth writes from Davis, California: “Is there a significant difference in heat absorption between light and dark roof colors? If I am looking at Oakridge Pro shingles; will the material absorb heat even if it is light colored?” Answer: The surface reflectance of asphalt shingles could range from 4 to 26 percent based on the color of the shingle. And yes, even the lightest and brightest colors of roofing materials absorb heat. If your real concern is saving energy and reducing the cost of cooling your home, there are other factors to be considered as well, such as ventilation and insulation. Attic and/or roof deck ventilation are an important factor in reducing heat buildup in the attic. For an unconditioned attic, air should be able to move freely through the space from the soffit to the ridge of the roof. If there is conditioned living space in the attic there should be a minimum of one inch of space under the roof deck and ventilation that flows in through the soffit and out through
