Galvalume vs G90 Steel Roofing
Understanding the Steel Beneath Your Metal Roof
The coating beneath a metal roof matters. Galvalume and G90 galvanized steel are both used in roofing, but they are not the same.
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What Is Galvalume?
Galvalume is a coated steel made with an aluminum-zinc alloy. It is commonly used in premium metal roofing because it offers strong corrosion resistance and long-term protection.
What Is G90 Galvanized Steel?
G90 galvanized steel is coated primarily with zinc. It is widely used in construction and roofing, but it performs differently than Galvalume in long-term corrosion resistance.
Key Differences
Corrosion Protection
Galvalume is known for excellent long-term corrosion resistance in roofing applications.
Coating Makeup
Galvalume uses aluminum and zinc, while G90 is primarily zinc-based.
Roofing Performance
Galvalume is often preferred for exposed roofing because of its durability and weather resistance.
Long-Term Value
A better substrate can help improve the long-term performance of the entire roof system.
Why the Steel Substrate Matters
Homeowners often focus on the top colour and profile, but the steel underneath is one of the most important parts of the roof. The coating system helps protect the metal from corrosion and supports the long-term durability of the roof.
Ask What Your Metal Roof Is Made From
Not all metal roofs use the same steel. Before choosing a roofing system, ask about the substrate, coating, gauge, fastening method, and warranty.
Choose the Right Metal Roof System
ROOFNOW™ helps homeowners understand what they are buying before they invest.
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