Aluminum coating 0.61 0.25 48°F 50 White-coated gravel on built-up roof 0.65 0.9 28°F 79 White coating on metal roof 0.67 0.85 28°F 82 White EPDM 0.69 0.87 25F 84 White cement tile 0.73 0.9 21F 90 White coating, 1 coat. 8 mils 0.8 0.91 14F 100 PVC white 0.83 0.92 I IF 104 Wh