Attic Temperature In Summer

An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.

Attic temperature in summer.

Hang an outdoor thermometer in your attic making sure its range reaches at least 130 degrees fahrenheit. Hang pencil and paper next to the thermometer and record the outdoor and attic temperatures. Attics can reach temperatures of 150 to 160 degrees f during a summer day although outside air temperatures are only 95 to 97 degrees f. Of course some environments are much hotter than others so this will be the perfect time to measure out how warm your attic will get during the most heated of seasons.

Summer attic air temperatures with old terra cotta colored asphalt shingles peaked at 140 to 145 at 18 above the blown in fiberglass insulation layer at the attic floor. If you ve ever had to go digging through your attic in the summer to try and find something you realize immediately the temperature in your attic is noticeably hotter. When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees. Hot summer weather poses the opposite problem for maintaining recommended attic temperatures.

An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate. The results of this study showed that during the summer in illinois attic ventilation could lower attic air temperature by 28 f 15 5 c and sheathing temperature by almost 10 f 5 5 c. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. However attic ventilation had only a minor effect on roof shingle temperature.