About the Presenter: Alex McGowan, Levelton Consultants Alex McGowan has been a building-science consultant for 28 years.  He is a member of ASHRAE Technical Committees 4.4 (Building Materials and Building Envelope Performance), 4.5 (fenestration), and 1.12 (Moisture Control in Buildings).  He is the author of Chapter 26 of the ASHRAE Handbook of Fundamentals (Heat, Air, and […]