Home Attic Temperature

What should the attic temperature be relative to the outside and house temperatures assuming a new supposedly well insulated house.

Home attic temperature.

These images came from a presentation danny parker gave pdf on fsec s cool roof research the third graph shows attic temperatures from the middle of the attic for several different types of roofing as well as a sealed attic. Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. When the attic becomes part of the home to be.

A standard powered exhaust vent turns on when the temperature inside the attic reaches a pre set limit and runs until the temperature drops. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner. A check the temperature an hour before sunrise. If it s 90 degrees outside the attic temperatures shouldn t exceed 110 according to home inspector jamison brown of amerispec home inspection services in poquoson.

If your attic soars above 100 degrees and reaches the 150 mark its time to consult. If your attic has less than r 22 insulation 7 inches of fiberglass or rock wool or 6 inches of cellulose you should add more. Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside. The white roof lowered the attic temperature by about 20 f.