Roof Temperatures In Summer

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.

Roof temperatures in summer.

At these temperatures asphalt shingles can melt. This actually speeds up the effects we looked at in the last paragraph. Your roof bears the brunt of the sun s force and is exposed to a lot of heat during the summer. This also speeds up the damaging effect of the uv rays and causes other problems.

An unventilated attic can also exacerbate the problem and make damage more likely. It s the ultraviolet radiation that they re subjected to all the time. The average temperature difference through the day was about 2 degrees f. Degrees fahrenheit on a sunny 90 degree day.

The maximum sheathing temperatures recorded were 168 f 76 c for black shingled roofs and 147 f 64 c for white shingled roofs. Color of your roof. An unshaded roof can reach temperatures of as much as 65 to 90 c. What kills shingles isn t so much the temperature.

A roof without shade might get up to 160 degrees f when the outside air temperature is only 90 degrees. 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. Let s look at the four most important roofing factors that affect the temperature of your home.