Attic Temperature Differential

Freezing and excessively hot outdoor temperatures rain and high.

Attic temperature differential.

Your insulating and heating cooling the house not the attic. Ideal attic temperatures and humidity settings aren t always easy to maintain. Attic temperature 0 f outdoors calculated difference. In reality however variables get in the way.

A good sign is when you open your attic in the winter and you don t see any frost on the nails poking through. Warner is right that the attic should be close to the outside temp. Ideal attic temperature and humidity settings. 63 9 f as was the case for the ceiling cavity and eave space temperatures total r value does not tell the whole story.

Installing attic vents if you don t already have them is another way to assist in the movement of hot and cold air out of your attic. Attic temperature depends on the amount of solar radiation construction details and the rate of ventilation. The layer of continuous insulation in the 2 4 wall shields the highly conductive steel stud from exposure to near outdoor temperature. Calculations indicate that on a july day in texas a ventilation rate of one air change per minute for a typical attic using 95 degree f air will lower the peak attic temperature to about 101 degrees f.

Snow acts as an insulator. 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. The frost is frozen condensation from the warm air meeting the cold air and not ventilating if that. In an ideal world the attic temperature would be the same as the outside temperature.