A dark San Antonio roof can hit 180 degrees on an August afternoon, and that heat drives both cooling costs and material fatigue. Here is how solar reflectance and thermal emittance work, what reflective coating systems can and cannot fix, and how to tell whether your roof is a candidate.

A dark low-slope roof in San Antonio can hit 190 degrees on an August afternoon, and your cooling system pays for every bit of it. Here's what reflective roof coatings actually save, how solar reflectance and thermal emittance work, and when recoating makes more sense than living with a hot roof.