Metal roofing is a popular choice for Nebraska homeowners thanks to its durability, energy efficiency, and modern appearance. But one of the most common questions we hear at ABC Seamless of Nebraska is: do metal roofs rust? While rust is a concern for any metal exposed to the elements, modern metal roofing materials are engineered to resist rust and corrosion, and some metals are better at this than others. Let’s discuss what causes rust, which types of metal roofs are most rust-resistant, and how you can ensure your roof stays strong and rust-free for decades.
The Truth: Do Metal Roofs Rust?
Yes, like any other metal surface, metal roofs can rust, but only under specific conditions. Whether a metal roof rusts depends on the material, protective coatings, exposure to the elements, and how well it is maintained. Again, many modern metal roofing systems are designed with rust prevention in mind, using rust-resistant materials and coatings that dramatically reduce the risk of corrosion.
What Causes Metal Roofs To Rust?
Regular inspections and proper installation are key to preventing rust from developing. Rust forms when iron or steel reacts with moisture and oxygen over time. Common causes of rust on metal roofing include:
- Constant exposure to rain, snow, or humidity
- Improper installation that traps water or debris
- Lack of protective coatings or worn-away finishes
- Harsh weather conditions, especially in high-moisture or coastal areas
- Cheap materials are used for installation
- Inadequate rust protective coatings
Metal Roof Rust vs Corrosion: What’s The Difference
While often used interchangeably, rust and corrosion are not the same.
Rust is a specific type of corrosion that only affects iron and steel. It occurs when these metals react with oxygen and moisture, forming a reddish-brown, flaky substance that weakens the structure over time. If left unchecked, rust can eat through metal, leading to roof leaks or failure.
Corrosion, on the other hand, is a broader term that refers to the gradual deterioration of any metal due to chemical reactions with its environment. This includes oxidation, pitting, patina formation, and galvanic corrosion. Metals like aluminum, copper, and zinc don’t rust, but they can corrode in other ways, such as developing a chalky surface or changing color (like the Statue of Liberty).
Types Of Metal Roofs and Their Rust Resistance
Aluminum
Aluminum is a common metal roofing material that has decent rust resistance. The lightweight metal naturally forms a protective oxide layer that shields it from corrosion. The major con to aluminum roofs is that, because they’re so lightweight, they dent easily. So, installing an aluminum roof in Nebraska might not be the best due to our frequent hailstorms.
Copper
Copper is another high-end option, known for its aesthetic appeal and durability. Over time, however, copper develops a greenish-blue patina that is not always appealing (though it is naturally rust-resistant). Copper is also very expensive and, like aluminum, can dent easily and expand and contract in extreme climates, which can cause structural issues.
Zinc
Zinc is less common in the residential market but prized in high-end architectural applications. Like copper, zinc forms a protective patina over time, which heals minor scratches and resists rust naturally. It performs well in most climates and offers a sleek, modern appearance with minimal maintenance. Again, though, it is not typically used on homes due to the expense and installation complexities.
Seamless Steel
Our seamless steel roofs are made from hot-dipped, G-90 galvanized steel, which is already the most rust-resistant you can get; but we go one step further and finish our steel with a Kynar® finish (a highly durable resin) to add even further resistance to rust, corrosion, and fading. Our systems are measured and cut on-site to fit the exact dimensions of a home, and the seamless design means there are no gaps or points of entry for moisture, which is a primary culprit in rust. We feel that, for the exceptional durability, rust resistance, dent-resistance, affordability, and customizability, you really can’t go wrong with steel for your roof.Â
How To Prevent Metal Roofs From Rusting
Proactive care and professional installation are your best defenses against rust. Chemical coatings can also extend the lifespan and appearance of your roof. Here are a few tips to protect your metal roof from rust:
- Choose high-quality galvanized steel for the ultimate resistance to rust and damage.Â
- Keep gutters and roof valleys clear of debris that can trap moisture.
- Repair damage promptly to avoid exposing bare metal to the elements.
Metal Roofing In Omaha, Lincoln, & Grand Island
ABC Seamless of Nebraska offers rust-resistant seamless steel roofing solutions engineered to last through Nebraska’s toughest weather conditions. Our roofing systems are backed by industry-leading warranties and expert installation and offer peace of mind and long-lasting performance. Contact ABC Seamless of Nebraska today for a free, no-obligation quote and discover the benefits of rust-resistant metal roofing for your home.
