Metal roof flue pipe flashing creates a weather-resistant seal where a vent or chimney passes through a metal roof. The right assembly depends on the pipe type, roof profile, slope, and manufacturer’s instructions—not just the pipe’s outside diameter. Choosing compatible parts and maintaining required clearances helps prevent leaks, roof damage, and fire hazards. This guide explains how to identify the correct flashing, what a proper installation involves, and when the work calls for a qualified roofing or chimney professional.
Product-specific instructions are essential because flashing assemblies differ. Useful starting points include the vent or chimney manufacturer’s installation manual, the appliance manual, and the metal-roof manufacturer’s technical details. For general code context, the International Code Council publishes model codes that jurisdictions may adopt or amend; the locally adopted code and local officials govern the project.
- International Code Council (ICC) — model building and residential code information.
- Chimney Safety Institute of America (CSIA) — consumer education and chimney-safety resources.
- National Fire Protection Association (NFPA) — fire-safety standards and educational information.
These references do not replace a product listing, manufacturer instructions, or local code approval. For a safe, durable result, the flashing must be compatible with both the roof and the exact flue system it serves.