JOSEPH LSTIBUREK, B.A.Sc., M.Eng., Ph.D., P.Eng., is a principal of Building Science Corporation and an Adjunct Professor of Building Science at the University of Toronto. He is a building scientist who investigates building failures and is internationally recognized as an authority on moisture related building problems and indoor air quality. He is an ASHRAE Fellow. The Wall Street Journal referred to him as “the dean of North American building science. Fast Company magazine called him “the Sherlock Holmes of construction”. Dr. Lstiburek is a noted authority on energy efficient construction techniques and heads one of the Building America program teams for the U.S. Department of Energy. He is the developer of ADA (the Air Drywall Approach to air barriers). He is a former Director of Research of the Housing and Urban Development Association of Canada. Dr. Lstiburek has written numerous books and technical papers on building construction and has conducted forensic investigations and served as an expert witness on building failures all over the U.S. He is an expert in the areas of rain penetration, air barriers, vapor barriers, air quality, durability and construction technology. Dr. Lstiburek received an undergraduate degree in Mechanical Engineering from the University of Toronto, a master’s degree in Civil Engineering from the University of Toronto and a doctorate in Building Science at the University of Toronto. Dr. Lstiburek has been a licensed Professional Engineer since 1982.