If you are looking to replace your roof and are searching for different roofing materials to replace it with, you might have come across metal roofs as an option. These roofs are durable, last long, and appealing.
With metal roofs, you get advantages that you wouldn’t get with other traditional materials, however, that doesn’t mean they’re not without imitations. One that you might have heard of is the problem of rusting. So, do metal roofs rust in Oklahoma, or is it just another myth like metal roofs attracting lightning?
Metal Roofs and Rust: Is This Still True?
Back in the day, having a metal roof most likely meant it was going to rust. This was mainly due to lower-quality metals being used to manufacture roofing panels. But do metal roofs still suffer these problems even today?
Rust forms when metal is exposed to moisture and oxygen for extended periods of time, leading to a process called oxidation. However, modern metal roofing materials are engineered to withstand oxidation via protective coatings, specialized treatments, and rust-resistant alloys.
Here are the most common types of metal used for roofing systems and their level of rust resistance:
Steel
While steel is known for its strength and affordability, it requires protective treatments to prevent rusting. Galvanized steel options are coated with a layer of zinc, which acts as a barrier against moisture and oxidation. Another highly effective option is Galvalume steel, which features a combination of aluminum and zinc coatings, providing superior resistance to corrosion.
Aluminum
Aluminum naturally resists rust because it doesn’t contain iron, which is the element responsible for oxidation. Even when exposed to constant moisture, aluminum develops a protective oxide layer that prevents corrosion. This makes it an excellent option for homes in humid or coastal environments where other metals may struggle. While aluminum can be more expensive than steel, its rust-resistant properties and low maintenance make it a worthwhile investment.
Copper
Unlike other metals that rust, copper undergoes a natural aging process that results in a greenish patina rather than traditional rust. This patina actually enhances copper’s ability to resist corrosion, creating a self-protecting surface that can last for over a century with minimal maintenance. However, it is important to note that copper roofs are an investment.
Zinc
Zinc is another highly corrosion-resistant metal that, like copper, forms a self-protective patina over time. This patina not only prevents rust, it also allows minor scratches and imperfections to repair themselves naturally. Zinc roofs are known for their long lifespan, which often exceeds 80 years, and require very little upkeep.
How to Prevent Rust on a Metal Roof
Preventing rust starts with selecting the right materials and following best practices for installation and maintenance. Here are some examples of how to keep your metal roof in top shape:
Choose Rust-Resistant Metal
When installing a new metal roof, choose rust-resistant metals such as the ones we described above. These materials provide enhanced resistance to corrosion and last significantly longer than untreated metal.
Ensure Proper Installation
An incorrect installation can lead to moisture buildup, which accelerates rust formation. Work with a reputable roofing company (like ours!) to ensure your roof is installed with precision, using high-quality fasteners and sealants to prevent leaks and corrosion.
Apply Protective Coatings
Most metal roofs come pre-coated with protective layers, but over time, these coatings can wear down. Reapplying coatings such as specialized roof sealants or rust-inhibiting paints can add an extra layer of protection against rust.
Which Coating Is The Best For My Metal Roof?
There are several types of roof coatings that enhance the durability and UV resistance of a metal roof. Silicone and elastomeric roof coatings are amongst the most sought-after coating options. To know more about special roof coatings for metal roofs, read our guide: What Is The Best Metal Roof Coating?
How To Treat Metal Roof Rust
Modern metal roofing materials are generally rust-resistant. But if you have been living in a home that had a metal roof long before you moved in, then there is a chance that the roof could rust.
If this situation sounds familiar, you have two options:
Repair Rusted Metal Roofing Panels
If you notice rust on your metal roof, don’t panic — it doesn’t necessarily mean you need a full replacement. In many cases, rust can be managed with timely repairs.
Surface rust can often be treated and sealed without major repairs. But if your roof is very old, there is a possibility that deep rust or corrosion has set in under the panels. If it’s the latter, it is advisable to call a professional roofing contractor.
If only a part of the roof is rusting, here are the steps you can take:
- Use a wire brush or sandpaper to gently remove rust from affected areas.
- Wipe away debris and clean the area with a mild detergent solution.
- Apply a high-quality metal primer before sealing the area with a protective coating.
Can I Paint Over A Rusted Metal Roof Directly?
You cannot paint directly over rust. If you do, it will lead to poor adhesion and premature paint failure. As mentioned above, rust must be properly addressed before painting to ensure the best results. Simply painting over rust without proper preparation will trap moisture underneath, potentially causing the rust to continue corroding the metal panels.
Roof Replacement
While minor rust spots can be treated, severe corrosion may require a roof replacement. Here are signs that it’s time to consider a new metal roof:
- Rust has caused holes or leaks.
- Large areas of corrosion have weakened the structure.
- Panels are warping or deteriorating beyond repair.
A metal roof replacement is an investment in your home’s long-term protection. As we already discussed, newer metal roofing materials come with advanced rust-resistant coatings so you get decades of worry-free performance.
Which Is The Best Paint For A Rusted Metal Roof?
The best paint for a rusted metal roof is one that is considered a high-performance, weather-resistant paint specifically designed for metal surfaces.
One of the top choices is Kynar 500®, a fluoropolymer-based paint known for its exceptional durability, UV resistance, and long-term protection against rust and corrosion. Acrylic-based metal paints are also a solid option, offering a cost-effective solution with good adhesion and flexibility.
Whichever paint you choose, ensure it is specifically formulated for metal roofing and contains rust inhibitors to prevent further oxidation. By selecting the right paint and applying it correctly, you can extend the lifespan of your metal roof while keeping it looking fresh and well-protected against Oklahoma’s harsh climate.
Get Quality Metal Roof Installation With The Experts At A. Fricker Roofing & Waterproofing
So, do metal roofs rust in Oklahoma? While metal roofing systems are highly resistant to rust, they’re not completely immune, especially if coatings wear down over time. The best way to protect your investment is through proper material selection, regular maintenance, and timely repairs.If you’re experiencing rust issues or are considering a metal roof for your home, our team of experts at A. Fricker Roofing and Waterproofing is here to help. Contact us today at (918) 402-7167 for a consultation, and let’s ensure your home stays protected for decades to come.
