Addressing Condensation in Low-Slope Roof Assemblies

In basic roofing design, vapor retarders and air barriers play a crucial role in reducing air leakage and enhancing the performance of the roof system. However, their benefits extend beyond simple air sealing. This course explores the impact of new innovative technologies, including permeable vapor retarders and air barriers, on moisture management, energy efficiency, and wind uplift resistance in low-slope roofing assemblies. Attendees will gain insights into moisture infiltration, air movement, and the risks associated with condensation buildup, material degradation, and loss of R-value in the roofing assembly. The presentation will cover strategies for the proper design and placement of a permeable vapor retarder to mitigate condensation buildup and premature roof failures. Recent research findings will highlight how advanced moisture control solutions, such as permeable vapor retarders, enhance long-term roof resiliency and durability, lowering the total cost of ownership.

Learning Objectives:

1. Understand the function of vapor retarders, permeable vapor retarders, and the main component layers in low-slope roof assemblies.
2.  Examine vapor drive and how moisture vapor moves through roofing systems.
3.  Assess the impact of permeable vapor retarders and air barriers on condensation buildup, thermal performance, and wind uplift resistance.
4.  Identify common misconceptions about air and moisture control layers and how to effectively mitigate moisture-related roof assembly failures.

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Scott Wood, Senior Building Scientist, VaproShield

Scott D. Wood is the Senior Building Scientist with the VaproShield team. He provides lab testing and evaluations on competitor and VaproShield’s products including investigation/testing of properties for new product development and quality control. Mr. Wood provides technical support for the company’s representatives, client inquires and assists in development – updating product literature, AIA presentations and numerous publications. Scott has provided decades of building science thermography level I & II certifications to thousands and numerous construction defect investigations. His extensive background in building science has supported the many excellent presentations and papers he has provided domestically and internationally.