CSA A123-21 Dynamic Wind Uplift Resistance
February 11, 2026 12:00 PM - 01:00 PM
Session Description:
Wind uplift remains one of the most critical—and often misunderstood—forces acting on roof and building envelope systems. This session provides a practical, standards-based overview of wind uplift resistance, with a focus on the CSA A123.21 Dynamic Wind Uplift Resistance standard and its application in contemporary building design.
Participants will gain a clear understanding of what wind uplift is, how it affects roof assemblies, and why inadequate resistance can lead to premature failures, costly repairs, and life-safety risks. The session will trace the evolution of CSA A123.21, placing it in context with related standards and explaining how and why dynamic testing has become essential for accurately assessing system performance.
A detailed comparison between CSA and FM testing protocols will highlight key methodological differences, performance criteria, and implications for product selection and compliance. The session will also explore how wind pressures are determined, including calculation methods, safety factors, and how recent NBCC revisions influence design requirements.
Through real-world examples, attendees will learn how to apply CSA A123.21 results on actual projects—how to interpret test reports and publications, select compliant assemblies, and properly reference wind uplift requirements in specifications. By the end of the session, building envelope professionals will be equipped to confidently evaluate wind uplift performance and integrate CSA-compliant solutions into design and construction documentation.
Learning objectives
After the session, attendees will be able to:
- Understand differences in testing and conformance between FM and CSA
- Use the online calculator to determine uplift pressures for a specific project
- Understand differences in the compliance path when design parameters change
- Identify alternative compliance paths for different scenarios
Guillermo Cordero
B.Arch., MRAIC, CTR, BSS, CSP
Director of Specifications, Soprema Canada
Guillermo brings decades of experience in architecture, building science, and high-performance building envelope systems. His work spans design, technical evaluation, and specification development, with a strong focus on durability, constructability, and risk mitigation in complex building assemblies. Throughout his career, Guillermo has collaborated closely with architects, engineers, and building envelope specialists to bridge the gap between design intent and real-world performance. His background allows him to translate technical requirements into practical solutions that support long-term building resilience.
- BSAO Member: $28.00
- OAA Member: $28.00
- Non-Member: $45.00
- Student: $28.00
Continuing Education Credits
- 1 BSS Credit
- 1 OAA Core Learning Hour
- Session may Qualify for PEAK CPD
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