Attic Temperature Vs Outside Temperature

Table 1 shows the calculation for the example in figure 1.

Attic temperature vs outside temperature.

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. A good sign is when you open your attic in the winter and you don t see any frost on the nails poking through. Your insulating and heating cooling the house not the attic.

A check the temperature an hour before sunrise. Simply undertstand that the insulation in your inner envelope ceiling attic floor must insulate the inner envelope of your house living area against whatever temp is in your attic. Should there be a difference between a 78 degree day and a 98 degree day. Warner is right that the attic should be close to the outside temp.

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. I hit 130 degrees in my attic when the outside temperature was. 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.

What should be the difference between outside inside temperature of an attic on a summer day versus a winter day. The technique applies to any number of component layers in an assembly. Ideally you don t want it any hotter than it is outside but reality generally prevent this from happening.