A cool roof is designed to reflect more sunlight and absorb less heat than a standard roof, improving energy efficiency and reducing cooling costs. It features special reflective materials or coatings to minimize heat transfer into the building. Fire-retardant shingles are treated to resist ignition and slow the spread of flames, with Class A-rated shingles providing the highest level of protection. Many cool roof shingles also have a Class A fire rating, making them both energy-efficient and fire-resistant.