Sharpening flashing requirements across all roof systems

By Jesse Sanchez. 

Gain clearer guidance on how updated code language standardizes flashing practices and reinforces manufacturer-aligned installation. 

Roofing contractors preparing for upcoming projects will need to take a closer look at the changes made to flashing requirements in the 2026 9th Edition of the Florida Building Code, scheduled to be implemented starting December 31, 2026, as outlined by the Florida Roofing and Sheet Metal Contractors Association (FRSA). While flashing has always been central to protecting roof systems from moisture intrusion, the latest revisions move decisively to eliminate ambiguity and establish a more consistent standard across all roof types. 

The code continues to define flashing as the component used to seal roofing systems where they are interrupted or terminated. What has changed is how clearly that responsibility is communicated. Updated language in Section 1503.2 reinforces flashing’s role in safeguarding the entire roof assembly, extending beyond traditional areas such as wall intersections and parapet walls to include penetrations, joints and system transitions. The result is a more comprehensive expectation: flashing is not limited to isolated conditions but is essential to the integrity of the full roofing system. 

This clarification directly addresses a gap that existed in previous editions. In some roof covering sections, flashing was not explicitly referenced, which led to inconsistent interpretations in the field. The 2026 update resolves that issue by introducing a uniform requirement across a wide range of systems, including metal panels, shingles, built-up roofing, modified bitumen and photovoltaic assemblies. Each now specifies that flashing must comply with both the code and the manufacturer’s installation instructions. 

That alignment with manufacturer guidance strengthens both installation practices and code enforcement. In parallel, the revisions refine where flashing must be installed, adding clearer direction around roof edges, penetrations and transitions between materials. New exceptions further distinguish between steep- and low-slope applications, offering more precise, condition-based guidance for contractors. 

The code also expands into adjacent systems. A new section addressing lightning protection systems reinforces that any roof penetration or attachment must maintain proper flashing integration, ensuring continuity across all components. 

These updates establish a clearer, more enforceable baseline. For contractors, that clarity supports better planning, more consistent execution and improved long-term performance as the industry adapts to evolving building code requirements. 

Learn more about how updated Florida Building Code flashing requirements impact installation practices, compliance standards and long-term roof system performance!