| For angles exceeding the critical angle, the refracted waves are evanescent and the reflectivity is very close to unity. |
| It has good electrical and thermal conductivities and high reflectivity to both heat and light. |
| This is because metal performs well when it comes to both emissivity and solar reflectivity. |
| Because of the lower roof surface temperature on roofs with a high emissivity and high reflectivity, urban heat islands can be reduced with widespread use of cool roofs. |
| Because it has a tacky surface, it attracts dust, which reduces its reflectivity somewhat. |
| Adds another R4.7 to the total insulation value including the reflectivity performance of the aluminum facer. |
