Galvanized vs. Galvalume A Comparison

If you're considering a metal rooftop for your home, you're already well on your way to improving your property's value, durability, and even style, as metal roofing is rapidly growing in popularity.

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Metal roofing offers an incredible level of strength, making it one of the most durable and long-lasting roofing options available. Today's market has diversified significantly, meaning that many of the old concerns about rust and aesthetics are no longer applicable. Therefore, there is little to cancel out the benefits.

However, deciding which type of metal roof to choose can be challenging. There are many considerations and great options available. A common dilemma for homeowners is whether to go with galvalume or galvanized metal roofing.

So which is better? What does each do better than the other? Do the differences even matter much? Read on to answer these questions and get a better picture of what route to take.

Galvalume Roofing Often Trumps Galvanized

Galvalume metal roofing is a composite coating material primarily made of aluminum. A 50-55% aluminum makeup is accompanied by a mixture of zinc and silicon. Metal sheets treated with galvalume typically have the same thickness as galvanized steel.

This type of coating has been around since the 1970s and continues to be a leading choice on the market due to its many benefits.

Galvanized steel, on the other hand, has a simple construction. It is coated with pure zinc and therefore much more susceptible to deterioration.

Superior Corrosion Resistance & Longevity

The particular elemental makeup of galvalume roofing makes it especially resistant to corrosion. You can expect it to last twice as long as galvanized roofing in most environments due to the natural rust resistance offered by its mainly aluminum composition.

This is even more noteworthy in a humid climate like Southwest Florida, where roofing tends to degrade quickly due to excess moisture. However, it's important to note that despite the extraordinary endurance offered, galvalume can still be at risk on the coastline. Direct exposure to sea spray can weaken the composite. Experts often recommend that coastal properties consider pure aluminum roofing instead.

Galvanized steel is prone to rusting, especially along the edges of the panels. Over time, this rust will spread inward, wearing away the integrity of your panels. Choosing panels with galvalume coatings minimizes this problem. The edge-based rusting will barely form, and it certainly won't creep in through the main body of the panels. This quality is referred to as "self-healing" in the roofing industry.

All of this makes it sensible that galvalume roofing comes with strong warranties. Its intense durability means it can be relied upon for many years. Compare this to the alternative, where the vulnerability of galvanized steel makes warranty coverage a rarity.

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Interestingly, galvanized roofing isn't much cheaper than superior galvalume most of the time. In fact, it can often be more expensive. This adds another strike against galvanized roofing, at least in Florida.

Galvanized steel can be a great choice in dry climates, where moisture exposure is limited. It has been known to last many decades in those conditions. But for homeowners in America's tropics, it just won't hold up.

Choosing the Right Metal Rooftop for Your Home

Hopefully, this quick rundown has painted a clearer picture of which type of metal roofing is better for your property. But if you're still uncertain, there's no need to stress. Our experts can help you determine the optimal choice.

We'll walk through your specific needs, as well as any influencing factors that may arise from your home's current condition. Our team is even available to conduct a free inspection to gain further insight. You'll receive a product recommendation and an official quote, giving you full transparency on what's entailed in choosing a particular roof type.

If you're ready to start talking and schedule your inspection, we're ready to pencil you in. Contact us today to reserve your appointment.

Galvanized steel is a type of steel that has been coated with a layer of zinc. This process, known as galvanization, protects the steel from corrosion. The zinc coating creates a barrier between the steel and the surrounding environment, preventing rust and other forms of corrosion. Galvanized steel is often used in outdoor structures such as fences, roofs, and gutters, as it can withstand harsh weather conditions.

Galvalume, on the other hand, is a type of steel that has been coated with a mixture of zinc, aluminum, and silicon. This coating provides better protection against corrosion compared to galvanized steel. Galvalume is also more durable and can withstand extreme weather conditions, making it a popular choice for roofing and siding.

One of the main differences between Galvalume and Galvanized steel is the composition of the coating. Galvanized steel has a pure zinc coating, while Galvalume has a mixture of zinc, aluminum, and silicon. This composition gives Galvalume better corrosion resistance and durability than Galvanized steel.

Another difference is the appearance. Galvanized steel has a shiny silver finish, while Galvalume has a matte gray finish. This difference in appearance is due to the composition of the coating. The aluminum and silicon in the Galvalume coating give it a duller appearance.

When it comes to cost, Galvanized steel is generally cheaper than Galvalume. However, Galvalume's superior corrosion resistance and durability make it a better long-term investment, especially for structures exposed to harsh weather conditions.

In conclusion, Galvanized steel and Galvalume are two popular types of steel commonly used in construction and manufacturing. While they might seem similar, there are significant differences between the two. Galvalume has better corrosion resistance and durability, but it is more expensive than Galvanized steel. When choosing between the two, it is essential to consider the specific application and the environmental conditions the steel will be exposed to.

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