Four Barriers for Four Wetting Potentials: How to Design Effective Building Exterior Walls

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Webinar On-Demand
Sponsored by TYPAR
Presented by Len Anastasi

Learning Objectives:

  1. Identify the four wetting potentials that the above grade vertical building enclosure assembly is exposed to.
  2. Determine the four barriers needed to protect the building enclosure assembly from the four wetting potentials.
  3. Explain the basic science and physics of how heat, air and moisture travel through a building enclosure.
  4. Determine how to properly incorporate the four barriers into the building enclosure in order to make it effective.

Credits:

1 AIA LU
0.1 IACET CEU*

This presentation looks at the four wetting potentials that exterior wall assemblies are exposed to due to the climatic difference between the interior and exterior environment. The four barriers needed to effectively separate the two environments and not create moisture problems are identified. The science and physics behind the inclusion and location of these barriers will be discussed. Various exterior wall assemblies will be reviewed and critiqued. The 2012 and 2015 International Energy Code requirements for insulation exterior wall assemblies will also be reviewed and critiqued. Live hygrothermal analyses will run to show assemblies that work, and assemblies that do not work.

Photo of a wall under construction..


Leonard Anastasi. Len Anastasi has worked in the construction industry for over 30 years in masonry, waterproofing and restoration work. He currently owns EXO-TEC Manufacturing Inc., EXO-TEC Solutions Inc. and EXO-TEC Consulting Inc. He is a member of ASTM’s E06 Committee on Building Performance. He is also a member of the Boston Society of Architects’ Building Enclosure Council. And is the past President of the Air Barrier Association of America and current Director and a Fellow, as well as a member of the Construction Specification Institute and the International Concrete Repair Institute.


TYPAR logo. TYPAR® brand products offer performance solutions that help ensure the integrity of wall cavities, and include the well-known TYPAR Weather Protection System—the industry’s most comprehensive lineup of Building Wraps, Flashings, Construction Tapes and accessories. All designed to work together to safeguard homes and structures—and deliver what no other name can: a lifetime limited warranty.* Superior from its core, our system provides the highest levels of performance where it counts the most. TYPAR® Building Wraps shut out air and water, but allow walls to breathe. Plus, exceptional tear strength and UV resistance supply rugged, durable defense. Learn more at typar.com.

 

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