Copper roofing itself doesn’t have a fire rating like typical roofing materials because metal is non-combustible by nature. This means copper won’t catch fire or contribute to the spread of flames during a fire, which is a significant safety advantage. However, the fire performance of a copper roof depends on the underlying materials, such as the decking and underlayment, which can be combustible. It’s important for homeowners to ensure that the entire roofing system complies with their local fire code requirements. Diagnosing fire resistance concerns is usually straightforward—if your building code requires a specific fire rating, you should check the entire roofing assembly, not just the copper panels. A simple DIY check involves looking under your roofing material in an attic accessible area to see what type of underlayment or insulation is installed, but avoid damage or unsafe conditions while doing this.
If you notice any signs of wear on the underlying materials or if you are unsure about the assembly, it’s best to call a professional roofer who is familiar with fire-rated roofing systems. Ask your contractor how the fire rating of your existing or planned copper roof system complies with local regulations, and whether the underlayment and deck meet class A, B, or C fire ratings. Inquire specifically, “How does this copper roofing system integrate with fire-resistant materials below to meet code?” and “Can you provide documentation for the fire rating of the full roof assembly, not just the metal panels?” Roofers experienced with metal roofing and fire codes will ensure your roof installation is both safe and within warranty guidelines.