An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate.
Attic temperature in summer.
Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient.
Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.
An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.
Hot summer weather poses the opposite problem for maintaining recommended 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.
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.
And it can cause your air conditioner to work harder than it needs to and send your energy bills soaring with the temperature.
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.
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.
In some cases attic temperatures can reach above the 150 degree mark.
Hang pencil and paper next to the thermometer and record the outdoor and attic temperatures.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.