Energy-saving roofs, designed to reduce cooling costs and enhance sustainability, vary in type and cost for a 1,500 sq. ft. roof: cool roofs ($1,000–$15,000) use reflective coatings or light-colored materials to reflect sunlight; metal roofs ($7,500–$22,500) offer durability and reflectivity; green roofs ($15,000–$37,500) provide insulation with vegetation; solar roofs ($22,500–$45,000) generate electricity; clay/concrete tile roofs ($12,000–$30,000) ensure natural ventilation; and cool asphalt shingles ($6,000–$15,000) improve efficiency affordably.