Crews and GCs ask us all the time: what’s the difference between Galvalume and Galvanized? Both are steel coatings made to protect panels from rust. Both work. But they’re not the same — and picking the right one can save headaches down the line.
What Is Galvanized Steel?
Galvanized steel is coated with zinc. That zinc layer fights rust by forming a barrier between the steel and the elements.
Pros:
- Good protection in most conditions
- Strong choice for hidden areas or short-term builds
- Often cheaper up front
Cons:
- Doesn’t always hold up as long in wet or coastal areas
- Can lose shine and color faster in Texas sun
For more detail on zinc-coated steel, see American Galvanizers Association.
What Is Galvalume Steel?
Galvalume steel is coated with a mix of zinc and aluminum. The aluminum helps it resist rust longer and keeps panels looking better in harsh weather.
Pros:
- Better corrosion resistance, especially in Texas heat
- Smoother surface and cleaner look
- Longer life expectancy in most environments
Cons:
- May cost more up front
- Can be less forgiving if cut edges aren’t handled right
Learn more from the Metal Construction Association.
Which One Fits Your Job?
- For long-term roofing in Texas: Galvalume usually wins. It holds up against heat, rain, and sun.
- For trim, interior, or short-term jobs: Galvanized can do the job at a lower cost.
- For architects and specs: Galvalume is often the default choice for exposed roofing panels.
Check our coils and flats for Galvalume and Galvanized options in stock.
Tips for Crews
- Always confirm gauge and finish when you order.
- Ask for PVDF or SMP coatings if color stability matters. PPG Duranar PVDF finishes are one example.
- If you’re unsure, call the yard — we’ll check availability and give straight answers.
FAQs
Q: How long does Galvalume last compared to Galvanized?
Galvalume often lasts 40–50 years. Galvanized can last 20–30 depending on conditions (Metal Roofing Alliance).
Q: Do both come with paint warranties?
Yes, when coated with PVDF or SMP finishes. Ask for warranty docs with your order.
Q: Can I mix Galvalume and Galvanized on the same job?
Yes, but confirm specs first. Some architects want consistency across the project.
Bottom Line
Both Galvalume and Galvanized protect steel. But Galvalume often goes further in Texas heat and weather. If you’re not sure which fits your job, call us. We’ll walk through stock, lead times, and warranties so you can keep your crew moving.