PHRC Webinars

Control Layers: Vapor Barriers & Retarders

1/28/2021 11:00 AM - 12:00 PM

Instructor: Christopher Hine (Residential Design & Construction Specialist, PHRC)


Link to Webinar:


There are a few control layers within an assembly, and in this webinar, we will look at two of them. Vapor retarders and vapor barriers are distinctly different but are often interchanged. In this webinar, we will review the property differences along with applications of use for each.

Learning Objectives

  1. Understand the reason for control layers and how they can reduce the flow of moisture through and assembly.
  2. Review the difference between Vapor Barriers and Vapor Retarders and how installing the wrong product for the application can reduce the structural integrity of the assembly.
  3. Review why a vapor barrier should be installed in specific applications to increase indoor air quality for the occupant.
  4. Understand the definitions of vapor barriers and vapor retarders and review the correct item to use as your control layer.


Free to attend; $20 for continuing education credit in live webinar

Credit Hours

Live Webinar: 1.0 L&I Contact Hour, 1.0 PDH, 1.0 AIA LU|HSW, 1.0 ICC Contact Hour (0.1 CEU), 1.0 NARI hour/CEU

Tags: Residential Structures and Building Code Requirements



The Pennsylvania Housing Research Center serves the home building industry and the residents of Pennsylvania by improving the quality and affordability of housing.

We conduct applied research, foster the development and commercialization of innovative technologies, and transfer appropriate technologies to the housing community.

Pennsylvania Housing Research Center

219 Sackett Building

The Pennsylvania State University

University Park, PA 16802

Phone: 814-865-2341

Fax: 814-863-7304