Attic Temperature Vs Outside Temperature

Your insulating and heating cooling the house not the attic.

Attic temperature vs outside temperature.

Table 1 shows the calculation for the example in figure 1. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. A check the temperature an hour before sunrise. 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.

If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals. For an indoor temperature of 68 f and an outdoor temperature of 8 f the temperature at the interface between the batt and the foam will be 27 f effect of indoor and outdoor air films is omitted. I hit 130 degrees in my attic when the outside temperature was. Warner is right that the attic should be close to the outside temp.

However more often than not. The technique applies to any number of component layers in an assembly. Should there be a difference between a 78 degree day and a 98 degree day. I have recently added a ridge vent to my roof and have also been taking temperature readings.

What should the attic temperature be relative to the outside and house temperatures assuming a new supposedly well insulated house. A good sign is when you open your attic in the winter and you don t see any frost on the nails poking through. Ideally you don t want it any hotter than it is outside but reality generally prevent this from happening.