Jason Sanchez, AIA is an architect with Wiss, Janney, Elstner Associates Inc. He has over 13 years of experience with building enclosures including investigation, assessment, and rehabilitation of existing buildings and new construction design review, construction observation, and performance verification.
Within many commonly used exterior opaque wall assemblies, the air and water control layers are provided by a single material with a combined function, indicated as an air and water barrier