Well, hopefully once I open up all the soffit vents there will be some airflow. You know what's funny? The original builder of the house (and the other 4 homes on the street) lives two doors down and his house is the only one that doesn't get ice dams. All built in 2002. I should walk over there and see if he would send a guy up on the roof to check the vent installation. The house between us gets wicked bad ice dams - basically the same house as mine but with a gable roof instead of hip. That house has a double-hung window on each end of the house in the attic and they are wide open all winter and still gets ice dams. This cobra vent must not be installed right on any of our houses on the street. Nice.