New 2025 National Building Code of Canada BOCA Engineering Publication

BOCA is pleased to announce the issuing of BOCA Engineering Evaluation Report 0064-32 to Westlake DaVinci Roofscapes, one of the first comprehensive roofing evaluation reports developed specifically for compliance with the recently released 2025 National Building Code of Canada (NBCC). The report provides an independent engineering evaluation of polymer composite roofing systems and serves as a technical resource for the design and specification of roofing products throughout Canada. 

Developed for architects, engineers, roofing consultants, specifiers, contractors, and building officials, this evaluation report goes beyond simply listing tested assemblies. It provides the engineering rationale, code references, design methodologies, and performance analyses necessary to support informed roofing system selection and demonstrate compliance with the latest Canadian building code requirements. In addition to the 2025 NBCC, the report also recognizes several provincial building codes, making it a valuable resource for projects across multiple Canadian jurisdictions. The evaluation addresses all major performance aspects of roofing systems, including:

• Fire classification 
• Wind uplift resistance 
• Wind-driven rain performance 
• Structural and environmental loading 
• Material durability and long-term weathering 
• Impact resistance 
• Installation requirements and design limitations 

One of the report's most significant features is its discussion of the wind load design procedure changes introduced in the 2025 NBCC. It explains how the revised wind design methodology has evolved to more closely align with ASCE 7, providing practical engineering guidance for determining design wind pressures, wind speeds, and roofing system selection under the updated code provisions. The report includes engineering commentary, design tables, and supporting calculations to assist professionals in confidently applying these new requirements in practice. 

At BOCA Engineering, our objective is to produce evaluation reports that function as architectural and engineering design resources, stepping beyond the basic compliance documents. By combining independent engineering analysis, third-party testing, and detailed code evaluations, our reports provide design professionals with the technical information needed to specify products confidently, reduce project risk, and demonstrate compliance with the performance objectives of the National Building Code of Canada. 

Click here access the full BOCA Engineering Evaluation Report.

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