Proper airflow is crucial to keeping your house at a moderate temperature, keeping you comfortable and your energy bill affordable. Not only will a hot and muggy attic run up your electricity bill, it will through off the air flow of your house, create too hot of an upstairs and freezing rooms below.

Circulating the air in the attic has a number of beneficial effects on the roof and the house in general. In winter, the circulation allows heat to escape, thus keeping the roof colder and preventing ice dams from forming. In summer, attic ventilation does just the opposite. It keeps the attic cooler and reduces the amount of energy you need to devote to air conditioning.