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Air Barriers, Vapor Barrier and Water-Resistive Barriers Start Simple and End Up Being Complex

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Air Barriers, Vapor Barrier and Water-Resistive Barriers Start Simple and End Up Being Complex

May 26, 2022 @ 1:00 PM - 2:00 PM EDT

Live webinar sponsored by the Air Barrier Association of America

Air barrier, vapor barrier and water-resistive barriers are control layers and each has a simple function to perform. Using them in a building assembly quickly turns very complex. Many have different definitions for the terms and some say the term is a verb and not a noun. Why does these simple terms when used in a building assembly turn very complex? Why does the building codes add to the confusion? Why does the test methods used to determine material properties add more confusion? The presentation lays out the reasons for the confusion and outlines a way to reduce the confusion and understand why there are differences.

Learning Objectives:

  1. Outline the four control layers.
  2. Determine why different terms can be used for a material.
  3. Explain why material testing may not give you design values.
  4. Describe why assembly testing provides more accurate information.

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Laverne Dalgleish Executive Director | ABAA Management Team | Air Barrier Association of AmericaLaverne Dalgleish

Mr. Laverne Dalgleish is the Executive Director of the Air Barrier Association of America (ABAA). As such, he works to champion energy conservation in buildings while educating the building owners and designers about the benefits of energy conservation such as durability, comfort, reduced maintenance, reduced HVAC equipment costs and the positive impact on the environment.

Mr. Dalgleish travels North America on a weekly basis to educate building owners and designers on the benefits of effective and working air barrier systems in buildings. This education mission includes working with standards development organizations, training and education groups, government policy departments, and quality assurance program developers for the construction industry. Mr. Dalgleish is the Secretariat of two ISO Committees, ISO TC61 SC10 Cellular Plastics and ISO TC163 SC3 Thermal Insulation Products. He is also Chair of the ULC Thermal Performance in the Building Environment Standards Committee.

Mr. Dalgleish was the key developer of the ABAA Quality Assurance Program for the installation of air barrier systems in buildings. This program is based on ISO9000 and ISO 12576-2 but brings the ISO requirements together with practical applications for the air barrier industry.


May 26, 2022
1:00 PM - 2:00 PM EDT
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