Extending the Life of the Roofing Assembly

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Webinar On-Demand
Sponsored by VaproShield
Presented by Scott D. Wood

Learning Objectives:

  1. Describe the history of roofing underlayments and define the roof assembly barriers: heat, air and moisture.
  2. Discuss the difference between asphalt felt and synthetic underlayment.
  3. Show how the mechanisms of vapor-permeable roof underlayments extend the life of the roof assembly.
  4. Articulate why a breathable roofing underlayment provides superior drying capacity over conventional roofing underlayments, and understand key details when installing a roofing underlayment.


1 AIA LU/Elective
As an IACET Accredited Provider, BNP Media offers IACET CEUs for its learning events that comply with the ANSI/IACET Continuing Education and Training Standard.
This test is no longer available for credit

This presentation provides detailed information on how breathable, vapor-open roofing underlayments mitigate water intrusion—extending the life of the roofing assembly. We will also examine how a breathable roofing underlayment can provide drying and ease installation.

Extending the Life

Illustration courtesy of VaproShield


Scott D. Wood is a Senior Building Scientist at VaproShield, and is responsible for product QA/QC on manufactured materials and investigation/testing of properties for new product development. He provides technical support for the company’s representatives, client inquiries and assists in development—updating product literature and creating VaproShield’s AIA presentations.


VaproShield VaproShield designs and manufactures high-performance water resistive air barrier wall membranes, roofing underlayments, and accessories to protect the wall and roofing assemblies from moisture and air infiltration.


Originally published in June 2021