Air and Vapor Barriers Demystified

with Foster Lyons
1 AIA CES Learning Unit|HSW

An explanation of air control layers, vapor control layers, the differences between them and the important aspects of each with regard to building design and construction.

This course will enable participants to:

1. Properly identify and calculate air exfiltration and infiltration quantities for given air barrier discontinuities and further identify the damaging quantities of water vapor carried by this air that will likely cause reduced material durability, reduced air quality, increased energy use and decreased occupant comfort.

2. Properly identify and incorporate into building design the proper air barrier materials and air barrier assemblies so as to prevent air exfiltration or infiltration and thereby prevent material decay, improve building durability, improve occupant comfort and reduce energy use.

3. Properly identify and incorporate into building design critical vapor control layer location so as to reduce water vapor migration and thereby prevent material decay, improve building durability, improve indoor air quality and reduce building energy use.

4. Properly label - with proper vocabulary and proper design intent - all air control layer materials and vapor control layer materials for optimum project team communication and coordination that will lead to reduced construction defects.

Please click here for additional AIA Continuing Education Provider Information:

Instructional Delivery Method: Live Online Learning Program

Program Level: Introductory

AIA CES Program Approval Expiration Date: August 10, 2024

Provider Number: G193

Provider Statement: The Institute of Classical Architecture & Art is a registered provider of AIA-approved continuing education under Provider Number G193. All registered AIA CES Providers must comply with the AIA Standards for Continuing Education Programs. Any questions or concerns about this provider or this learning program may be sent to AIA CES ([email protected] or (800) AIA 3837, Option 3).

This learning program is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

AIA continuing education credit has been reviewed and approved by AIA CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.


This course will be offered on December 3, 2021 as part of the Health, Safety, and Welfare in Traditional Design day. Course registration is available on the program page here.