Why do you need to vent the attic?
Attic ventilation is extremely important as the combination of roof vents and soffit ventilation helps keep the attic dry by having the roof vents draw fresh air from the soffit and exhaust this air. When the fresh air is picked up it mixes with potential air with moisture in it from the house that has escaped into the attic and rids it out the roof vents. Venting will stop excess moisture build up and premature building material degradation in your attic. It could also prevent mold from forming.