The Evolution of Water-Resistive and Air Barriers in Commercial Building Envelope Construction

Understanding Integrated Sheathing + WRB-AB System Solutions
Sponsored by Georgia-Pacific Gypsum

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Learning Objectives:

  1. Explain the key functions required by building codes for water-resistive barriers, continuous air barriers, vapor retarders, and thermal barriers in a building envelope/enclosure.
  2. Describe the durability, resilience, energy efficiency, and advantages/disadvantages of the various WRB-AB systems currently on the market.
  3. Describe the differences in manufacturing and performance between coated and fully integrated methods of all-in-one sheathing systems available in the marketplace today.
  4. Design with integrated sheathing products to achieve labor, material, and installation time savings in commercial building envelope construction.


AAA 1 Structured Learning Hour
AANB 1 Hour of Core Learning
AAPEI 1 Structured Learning Hour
SAA 1 Hour of Core Learning
MAA 1 Structured Learning Hour
NSAA 1 Hour of Core Learning
OAA 1 Learning Hour
NLAA 1 Hour of Core Learning
NWTAA 1 Structured Learning Hour
This course can be self-reported to the AIBC, as per their CE Guidelines.
This course is approved as a Structured Course
Approved for structured learning
This course is approved as a core course
Approved for Core Learning
Course eligible for OAA Learning Hours
This course is approved as a Core Course
Course may qualify for Learning Hours with NWTAA
This course can be self-reported for Learning Units to the Architectural Institute of British Columbia

The purpose of this course is, first, to take a look at the evolution of water-resistive and air barriers—we’ll refer to them as WRB-ABs for short—in commercial building envelopes. And second, to introduce new, all-in-one integrated gypsum sheathing and WRB-AB systems as viable alternatives to traditional systems.



Georgia-Pacific Gypsum Dens® Solutions are industry trusted, high-performing fiberglass mat gypsum panels suitable for your wall, roof, ceiling and floor projects. Dens®Solutions carry the mark of our valued heritage in Gold®, our patented color, as a visible standard-bearer of our position as the first manufacturer to create a fiberglass mat board and as a relentless innovator of strength and moisture resistant products for over 30 years. Dens® Solutions answer building challenges with ingenuity.