This course examines how modern building codes and airtight construction practices are increasing the importance of moisture-aware roof design in cold-climate environments. Participants will explore building code requirements and the growing risk of moisture entrapment in roofing assemblies. The course introduces hygrothermal modeling as a predictive tool, using WUFI to analyze roof assemblies’ long-term performance. Through comparative analysis using real-world case studies, attendees will gain a clear understanding of how vapor-permeable underlayments enhance drying potential and provide greater moisture management compared to vapor-impermeable membranes, supporting more durable and resilient roof system design decisions.

Learning Objectives:

1. Identify the relationship between current building codes and the increased risk of moisture entrapment in airtight building envelopes.
2. Understand the role of hygrothermal analysis (WUFI) in predicting the long-term performance of roof assemblies in cold climates.
3.  Analyze the difference between vapor-permeable and vapor-impermeable membranes regarding drying capacity and “moisture safety margins.”
4. Assess WUFI case studies to understand how vapor-permeable underlayments improve moisture performance compared to vapor-impermeable underlayments.

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Scott Wood, Senior Building Scientist, VaproShield

Mr. Scott Wood has decades of experience in building science and infrared thermography as an instructor and consultant. As the Senior Building Scientist for VaproShield he operates the FrogLab, testing and evaluating AB/WRB systems and associated accessories. He provides technical support for the company’s representatives, client inquiries, and assists in development – updating product literature and creating VaproShield’s AIA presentations. His expertise has provided numerous papers and presentations in both the building and thermography sciences.
His credentials and memberships span a large array of specialties including B.S. in Microbiology with an emphasis in biochemistry and molecular biology, trained in WUFI, fire/mold-water/asbestos/odor remediation, Level III Thermographer, memberships in ASTM C06 & C16 committees, BEC, IACT, AUPTA, ABAA.