When warm moist air from inside the conditioned living area of a home makes its way into the attic, we need to vent that air out in a quick and efficient manner. This is especially true during the very cold Minnesota winter months. In the picture above, we see frost accumulating on the underside of the roof deck in the attic. The warm moist air that has made its way up from the living area below is not being vented out efficiently. The air contacts the cold roof deck and rel