Roof Temperatures In Summer

At these temperatures asphalt shingles can melt.

Roof temperatures in summer.

The maximum sheathing temperatures recorded were 168 f 76 c for black shingled roofs and 147 f 64 c for white shingled roofs. What kills shingles isn t so much the temperature. Overall the plywood sheathing in black shingled roof systems tended to be 10 f to 15 f 5 c to 8 c warmer dur ing the midafternoon of a sunny day than the plywood in comparable white shingled roof systems. This fsec study didn t look at shingle lifetime but i think that adding 9 degrees to a temperature of 150 degrees won t make much difference.

A roof without shade might get up to 160 degrees f when the outside air temperature is only 90 degrees. An unshaded roof can reach temperatures of as much as 65 to 90 c. Degrees fahrenheit on a sunny 90 degree day. Different sources report different temperatures.

It s the ultraviolet radiation that they re subjected to all the time. Your roof bears the brunt of the sun s force and is exposed to a lot of heat during the summer. Here s the kind of temperatures you can expect your roof to reach this summer depending on its surface. An unventilated attic can also exacerbate the problem and make damage more likely.

Let s look at the four most important roofing factors that affect the temperature of your home. The average temperature difference through the day was about 2 degrees f. Roofs that absorb more heat in the summer will also absorb more heat in the winter which can actually be a wonderful positive when it comes to melting snow and keeping your home toasty warm in the winter.