Educational Event

Advanced Air Barriers for the Building Envelope


AIA Milwaukee

Everything you were afraid to ask about air barriers but didn’t. One of the main discussion points is identifying and eliminating air loss into or out of buildings envelope. Air/water penetration occurs through dissimilar material connections, transitions, MEP, penetrations, etc. that penetrate the envelope. Discussion of best practices to help prevent energy loss along with air, moisture and water infiltration/exfiltration are made.

Extended building service life of is the net goal of properly designed and installed air barrier systems. Industry drivers for air barrier and air barrier systems such as codes (IBC, IRC, IECC), performance aspects for specifications using ASTM are also examined. Additionally, this seminar addresses misconceptions of moisture accumulation and early envelope failure caused by vapor diffusion through wall assembly components as opposed to the real culprit of bulk air movement caused by improper or absent treatment of penetrations.

Learning Objectives:

  • Explore Vapor barrier history that includes a discussion of peripheral connections, including roofing and foundation systems and envelope continuity.
  • Identify definitions for Air Barrier, Vapor [Retarder] Barrier, Air Barrier System (assembly) & Water Resistive Barrier (“WRB”).
  • Discover where and when to use permeable versus non-permeable membranes.
  • Examine Industry Codes, drivers and practices and the importance of specifications. Explore examples (images) of the good, the bad, the ugly and the I just don’t care.


Lunch is included. Registration is required.


Scott Wolff, Henry Company


Image credits