Arizona Attic Temperature

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.

Arizona attic temperature.

The air inside your attic can reach temperatures upwards of 180 degrees far hotter than it actually gets outdoors. The result is excessive wear on your ac unit along with increased utility costs. Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient. This crazy heat can make you uncomfortable increase energy bills and damage your roof all while possibly voiding your roof s warranty.

During the summer it is like having an oven on top of your home that continues to work against your air conditioning s efforts to cool your home. Our attics in phoenix can reach over 180 degrees and then drop down to 50 degrees or lower in the winter. But newer homes in central and southern arizona are insulated to ratings of r 30 to r 38 while newer homes in northern arizona generally have attic insulation at r 60 because of colder winters. Expansion and contraction and those.

Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. 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. The maximum sheathing temperatures recorded were 168 f 76 c for black shingled roofs and 147 f 64 c for white shingled roofs. If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals.