Attic Temperature In Summer

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.

Attic temperature in summer.

Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient. Hang an outdoor thermometer in your attic making sure its range reaches at least 130 degrees fahrenheit. An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate. When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.

However attic ventilation had only a minor effect on roof shingle temperature. An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be. Hang pencil and paper next to the thermometer and record the outdoor and attic temperatures. Hot summer weather poses the opposite problem for maintaining recommended attic temperatures.

In some cases attic temperatures can reach above the 150 degree mark. 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. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. 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.