Earlier this year, Air Vent wrapped up its 15th season presenting its educational Attic Ventilation: Ask the Expert™ seminars. Thanks to the generous participation of more than 27,000 attendees, the program has evolved into a collection of best practices and things to avoid in residential and light commercial attic ventilation. After more than 600 seminars across 44 states and Canada, here’s what we’ve learned about roofing contractors.

Generally, roofers want to do the job right. And when they are unsure or want to confirm their game plan, they ask questions in an effort to better understand the relationship between attic airflow, roof geometry, climate conditions, vent design, etc. The seminar provides a forum to ask those questions in person. Many times fellow roofers (yes, the competition!) participate in the answer. Here are the five most frequently asked questions we continue to hear.