According to the u s.
Attic cold in fall.
The attic is the hottest part of the house in the summer and is cold in the winter hot air rises up to the attic cold falls drops into the living space moisture rises and accumulates in the attic central heating ac systems and ductwork are often in the attic.
Good attic ventilation helps keep temperatures even preventing hot and cold spots that cause damaging ice dams where water can back up and freeze beneath your shingles.
Department of energy doe the average unimproved attic has just r 19 insulation the insulation value of a five and a half inch thick fiberglass batt.
A phenomenon caused by prolonged cold spells and improper ventilation.
Attic flies common this winter by donald lewis department of entomology the large black pesky flies that show up in bed rooms and on window sills from late fall through early spring have been very abundant this year possibly because of the wetter than normal weather we had last summer.
Small attic vents located below the roof peaks provide sufficient ventilation to let the moisture created by heat rising into the.
If your attic is too cold it probably lacks sufficient protection from outside temperatures.
During cold winter months the attic vent fan is not necessary.