If you've been researching metal roofing, you've probably seen the term "Galvalume®" — but what is it, exactly? And why do contractors like Wholesale Metal Roofing specifically recommend it for Florida homes?
Let's break it down clearly.
What Is Galvalume®?
Galvalume® is a brand name for a type of steel coated with an aluminum-zinc alloy. The coating is typically 55% aluminum, 43.5% zinc, and 1.5% silicon, applied to high-strength steel in a continuous hot-dip process.
The name combines "galvanized" (zinc coating) and "aluminum." It was developed in the 1970s and has become the standard material for standing seam metal roofing in the United States.
The key advantage over standard galvanized steel: the aluminum component dramatically increases corrosion resistance, while the zinc component provides the sacrificial protection that stops rust from spreading if the coating is scratched.
How Galvalume® Performs in Florida's Climate
Florida presents specific challenges for roofing materials:
Extreme Heat
Florida's summer heat is intense. Galvalume®'s natural silver-gray surface reflects solar radiation rather than absorbing it, keeping your attic and home cooler. Painted Galvalume® panels are available with cool-roof coatings for even better energy performance.
High Humidity and Moisture
Florida's humidity accelerates corrosion on standard metals. Galvalume®'s aluminum-zinc coating provides far superior protection — outlasting standard galvanized steel by a significant margin in humid environments.
Hurricane and High-Wind Events
Galvalume® standing seam panels can be engineered and installed to exceed Florida's wind load requirements. The interlocking seam design and through-fastened or clip-fastened systems provide exceptional wind uplift resistance.
Heavy Tropical Rainfall
Galvalume® panels shed water rapidly. The smooth surface and sloped installation ensure water moves off the roof quickly, reducing the risk of intrusion during Florida's intense rain events.
Salt Air (for Coastal Areas)
While Polk County is inland, proximity to Florida's coasts means some salt air exposure. Galvalume®'s aluminum coating provides significantly better salt corrosion resistance than standard galvanized steel.
Galvalume® vs. Standard Galvanized Steel
Many homeowners ask about the difference between Galvalume® and galvanized steel. Both have zinc coatings, but Galvalume's aluminum-zinc alloy coating makes it:
- 2–4x more corrosion resistant in most environments
- Significantly better at resisting heat and UV degradation
- Longer lasting — often 40–70 years vs. 20–30 for standard galvanized
- More dimensionally stable in temperature extremes
Why Wholesale Metal Roofing Uses Galvalume®
We've been installing roofs in Polk County since 1999. In Florida's climate, we've seen what works and what doesn't. Galvalume® consistently outperforms other materials in our environment.
We also manufacture certain Galvalume® roofing products in-house, which means we can sell direct to homeowners — cutting out the markup and delivering real savings.
When we recommend Galvalume®, it's not because it's trendy. It's because after 25+ years of working in Florida's demanding climate, it's the material we trust to protect our neighbors' homes.
Ready to Learn More?
Schedule a FREE estimate and we'll walk you through exactly how Galvalume® metal roofing can protect your Polk County home — and what it would cost.