Certainteed-landmarksolarisroofing_HEROThis hybrid roofing material from CertainTeed contains advanced granules that reflect the sun’s rays. Bob Kayser, purchasing manager at Gentry Homes, tells BUILDER that he installs the cool roof technology regularly: “We’re always looking for the latest and greatest in energy-efficient building materials. [In Hawaii,] we’re looking at 35 cents per kilowatt-hour.” The steep-slope, solar-reflective asphalt shingles can reduce a roof’s temperature by as much as 20 percent in the summer, according to the firm. The line’s rich colors all meet Energy Star standards for solar reflectance and thermal emissivity.