Does metal roofing rust?

Metal roofs are among the most popular roofing materials on the market, favored by both homeowners and business owners for their durability, performance, and longevity. However, metal roofs can be subject to rust if not properly maintained. In this guide, we will explore ways to prevent and treat rust on your metal roof panels.

Does metal roofing rust?

Thanks to advancements in paint systems, finishes, and other technologies, metal roofs can resist oxidation throughout their lifespan. Several factors can influence whether your roof will rust, such as the use of unpainted, plain steel or improper cutting of panel edges.

Rust-Resistant Technologies

Metal roof panels are composed of metal and coated with high-quality paints and finishes, then rigorously tested for rust resistance. The most common types of rust-resistant steel and coatings are as follows:

1. Galvalume Steel: This coating, made from aluminum, silicone, and zinc, provides excellent corrosion and rust protection. Ideal for environments with high temperatures, heavy precipitation, or marine conditions, Galvalume is known for its matte finish.

2. Galvanized Steel: Made of carbon steel and zinc dioxide, galvanized steel panels are secured and protected by the zinc coating for many decades. A clear resin coating adds a smooth, shiny finish to the panels and enhances scratch resistance.

3. Weathering Steel: Weathered Steel, coated with a layer of silicon, copper, and phosphorus, is an excellent choice for steel roofs. Initially rusting when exposed to the environment, once the topcoat is removed, the steel ionizes, preventing further rusting and corrosion. This finish is designed to last as long as any other without rusting.

By choosing rust-resistant materials and ensuring proper installation and maintenance, you can enjoy the benefits of a metal roof without the worry of rust compromising its performance and longevity.

This article was written by a roofing professional at At, we’re determined to be the only one you need to hire for the entire lifespan of your new roof. We take a modern, professional approach to the roofing business in order to ensure our customers in St. Petersburg and the Central Florida region have the best possible experience whenever they choose us. Click Here to learn more!