White Barrel "S" Tile
Roof testing by the Florida Power & Light Company in the hot, sunny and humid conditions of Florida shows that white s-shaped tiles made from concrete are very effective at keeping heat from the sun out of homes. They reflect about 74 percent of the sun's energy away from the roof [source: Better Homes and Gardens].
White barrel "s" tiles resemble traditional terra cotta designs and require similar installation techniques, and they take advantage of the same raised arch design, which allows for air circulation. S-shaped concrete tiles in bright white reflect more solar rays than traditional terra cotta, though, by about 40 percent [source: Better Homes and Gardens].