When the temperature fluctuates and there are changes in weather, all roof systems will expand and contract. During the heat of the day, it is not uncommon for most roof substrates to reach 150 degrees. When the sun goes down the roof will cool down to the ambient air temperature. If the temperature at night is 75 degrees, this creates a 75-degree difference that causes a lot of expansion and contraction. Our bright white topcoat has UV reflective properties and will typically be within 10 degrees of the ambient air temperature. On a 95-degree day this can reduce the day to night temperature difference.
In addition to a 45-degree temperature differential, our system also has elastic properties that allows it to expand and contract so it will not fail.