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.
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.
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.
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.
Hot summer weather poses the opposite problem for maintaining recommended attic temperatures.
Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient.
An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate.
In some cases attic temperatures can reach above the 150 degree mark.
Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.
Hang an outdoor thermometer in your attic making sure its range reaches at least 130 degrees fahrenheit.
However attic ventilation had only a minor effect on roof shingle temperature.