Roof Temperatures In Summer

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.

Roof temperatures in summer.

Different sources report different temperatures. The maximum sheathing temperatures recorded were 168 f 76 c for black shingled roofs and 147 f 64 c for white shingled roofs. Your roof bears the brunt of the sun s force and is exposed to a lot of heat during the summer. Degrees fahrenheit on a sunny 90 degree day.

What kills shingles isn t so much the temperature. At these temperatures asphalt shingles can melt. An unventilated attic can also exacerbate the problem and make damage more likely. The average temperature difference through the day was about 2 degrees f.

This also speeds up the damaging effect of the uv rays and causes other problems. A roof without shade might get up to 160 degrees f when the outside air temperature is only 90 degrees. This actually speeds up the effects we looked at in the last paragraph. Here s the kind of temperatures you can expect your roof to reach this summer depending on its surface.

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. Color of your roof. 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.