![]() Steels that have more zinc in the metallic coating, therefore, will get this protection faster and to a larger degree. Over time, this builds up and protects that edge from rust. When rainwater washes down the cut edge, zinc ions from the exposed metallic coating go into solution with hydrogen from the water and are deposited on the bare carbon steel edge. When a cut is made in the steel, bare carbon is exposed but so is the corrosion-resistant metallic coating. While painted AZ50 Galvalume steel also meets industry standards, the coating on this metal still has less protective zinc in it than galvanized steel has. I am a fan of G90 galvanized steel for corrosion resistance. The more of this coating that is on the steel, the better cut edge protection will be. Steels are categorized or graded based upon the amount of this metallic coating that is on the steel. ![]() This coating is usually an alloy of zinc and/or aluminum. The steels used in metal roofing have a corrosion-resistant metallic coating on both sides of the core carbon steel. Read on to find out how that steel is protected from rust. The key to a rust-free edge is a sharp and crisp cut that exposes as little bare carbon steel as possible. ![]() Field-cut edges, due to the lack of precision that often exists on job sites, are at considerable risk of rust. First of all, it’s important to realize that there really is no difference between factory edges and edges made from cuts on the job site. Most of them have been misleading at best. Over the years, we have heard all kinds of explanations for how cut edges are protected on steel roofing. Ensure that a steel roof is right for your environment Cut Edge Protection for Steel Roofing But how do you keep a ferrous metal like steel from rusting?ģ. Steel roofing can offer certain desirable attributes for some homes, and often at a lower price point. Home | Roofing Information | Rust: Steel Roofing Can Be Protected Rust: Steel Roofing Can Be ProtectedĪug| Filed under: Roofing Help, Roofing Installation, Roofing Materials, Uncategorized ![]()
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