Galvalume vs Galvanized Metal Roof
By 
selkoshairi on October 8, 2024
When choosing a roofing option for your home or any other building, it should meet two things, i.e., your budget and maximum life span. On that note, it is crucial to know the different material types, their costs, durability, and resistance to harsh conditions. Your roof protects you and your belongings; thus, you must be mindful before selecting a metal roof. Hence, to help you make the best choice, we have compared the types of materials: Galvalume vs Galvanized metal roof.
While they look quite similar, they have some differences that you must pay attention to. Here, you’ll learn everything you need to know about these two materials, which will help you make the best choice for your home or business.
What is Galvalume?
In the 1970s, U.S. shipbuilding company Bethlehem Steel experimented by adding metals to melting zinc. They were trying to make a mix that could provide even more protection. They eventually found a perfect combination, and later named it Galvalume.
Galvalume steel, known for its exceptional corrosion resistance, combines three common roofing metals: aluminum, zinc, and silicon. Galvalume has 55% aluminum, 43.4% zinc, and 1.6% silicon as its coating layer on steel sheets, offering strength and superior rust prevention.
Galvalume Properties and Uses
Galvalume stands out among roofing materials because it can resist corrosion better than others. Galvalume’s composition is one of its major advantages, as aluminum provides corrosion resistance, zinc offers protection, and silicon helps the coating adhere to its base even when cut or rolled into corrugated shapes.
Its sleek appearance lends a contemporary appeal, ideal for architects and homeowners looking for functionality and style.
Galvalume suits extremely harsh environments, hurricane zones, or places with high rain or snowfall. Some common uses include:
- Residential Building
- Government Offices
- Warehouses
- Factories
- Barns, etc.
Benefits of Galvalume Metal Roofs
Galvalume Metal Roofs have many benefits that are worth considering for you:
Super Corrosion Resistance
Galvalume Roofing provides superior corrosion resistance because of its aluminum-zinc coating compared to other roofing materials.
Longevity
A Galvalume Roofing typically lasts 40+ years when properly cared for. It can outlast many other metal roof materials.
Energy Efficiency
Galvalume metal’s reflective surface helps buildings remain cooler so you can save on energy consumption.
Aesthetic Appeal
Galvalume metal provides a modern look and aesthetic charm to the infrastructure of the building.
What Is Galvanized Metal?
It’s been over 200 years that the construction industry has been using galvanized metal. The term was first used in France in 1836 when the inventor Stanislas Sorel filed a patent for the galvanizing process. Even today, galvanized steel is made just as it was at the time of Sorel.
Galvanized metal refers to steel coated in an anti-rust layer by dipping it in hot molten zinc; the process is known as galvanization. This results in the formation of a bond between steel and zinc. The zinc layer protects the metal from rusting and degradation thus it’s good for outdoor uses.
Common Uses of Galvanized
Galvanized metals can’t handle the harsh conditions of coastal environments, such as buildings on shorelines with breaking surfs or large bays and marshes. Saltwater in the air can degrade the galvanized coating, leading to premature rusting and causing destruction to the structure.
Galvanized metal roofing is still being used in construction projects due to its affordability and ease of availability. Residential homes, agricultural buildings, and carports all use it today.
Galvanized Metal Roof Benefits
Galvanized metal roofs have some benefits that you should be aware of:
Affordability
Galvanized metal is cheaper than its alternatives, making it the perfect solution if you’re looking for a durable and long-lasting option at the lowest price in the metal roofing category.
Good Durability
Although not as corrosion-resistant as Galvalume roofing materials, galvanized roofing still provides good protection from weather elements.
Versatility
You can easily paint or coat galvanized roofs for additional protection and versatility. So, you can maximize safety and enhance style.
Galvalume Vs. Galvanized Metal Roof
Now that you understand each material to some extent, let’s compare their relative qualities against one another for better understanding.
Durability Comparison
Galvalume stands alone for its superior rust resistance and longevity even in moist environments like coastal regions with high rainfall. Galvanized metal, although durable, tends to rust more over time in harsh environments.
Galvalume roofs can last almost 4 decades with regular care and maintenance, while galvanized roofs need repair or replacement within 20-30 years.
Cost Analysis
Galvanized metal is cheaper, making it the go-to material for budget projects. But if you think about it, Galvalume will offer greater long-term value due to reduced maintenance requirements and longer lifespan. So even though its initial costs might be higher, its longevity makes it a smart choice.
Aesthetic Differences
Both materials have aesthetic qualities that are different from each other. Galvalume roofing has sleek and shiny surfaces suitable for modern buildings or residential homes. On the other hand, Galvanized metal has traditional matte surfaces ideal for classic designs or rural settings.
Performance in Different Climates
Due to its superior corrosion resistance, Galvalume excels in coastal environments or those experiencing heavy rainfall or snowfall.
Galvanized metal is better suited for less aggressive climates like inland areas with a lower risk of corrosion. If your home or factory falls near coastal or harsh regions, Galvalume could be your go-to choice.
Pros and Cons of Galvalume Metal Roof
Pros
Corrosion Resistance
Galvalume has the best corrosion resistance compared to galvanized metal, as its reflective surface helps buildings stay cooler by decreasing energy costs.
Energy Efficiency
It has a reflective surface that keeps buildings cooler, thus saving energy costs. It can reflect and release about 25% of solar radiant heat.
Low maintenance
It doesn’t require frequent repairs, thus saving both time and money over the years.
Cons
Cost
It’s more expensive than galvanized metal, which doesn’t make it an ideal choice for tight-budgeted projects. Therefore, some people avoid galvalume even though it’s superior in quality.
Potential Issues in Coastal Environments
Although Galvalume has high corrosion resistance, excess exposure to saltwater can still cause rust. Not frequently, but still, you’ll have to care for and maintain it when needed.
Recommended Uses of Galvalume
Galvalume metal roofing sheets are an excellent choice for homes, commercial buildings, or warehouses, especially if you live in someplace exposed to rain, snow, or salt water. Their robust durability makes them popular in contemporary designs with sleek features.
Pros and Cons of Galvanized Metal Roofs
Pros
Affordability
Galvanized metal is the best choice for people looking for durability at a pocket-friendly cost. It’s also an ideal choice if rust and corrosion are not a big issue in your area.
Good for less corrosive environments
In inland environments where rust is not a big problem, galvanized metal roofing will offer greater versatility. It’s easier to install and also further repaint or add an extra layer of coating for added protection.
Cons
Prone to Rust
Galvanized roofs absorb moisture faster and lead to corrosion over time. They also erode quickly under extreme weather conditions, such as places near the ocean or areas with extreme rain or snowfall.
Shorter Lifespan
They need frequent repainting and repairs as compared to galvalume metal roofing solutions.
Recommended Uses of Galvanized
Galvanized metal roofing sheets are ideal for budget-minded projects and places where rusting won’t be an issue. Perfect conditions include dry environments that don’t experience regular precipitation.
Cost Comparison: Galvalume vs Galvanized Metal Roof
Galvalume costs more initially but can save money over time as it requires little maintenance and is durable. On the other hand, galvanized metal may initially seem cheaper; however, it will frequently need repairs over time. If long-term savings are your aim, Galvalume should be your choice, especially in harsher climates.
Durability and Lifespan of Galvalume vs Galvanized Metal Roof
Galvalume roofs outperform galvanized metal in terms of longevity. Galvalume’s corrosion resistance is two to four times better than galvanized steel due to its unique coating of 3 strong components.
Galvalume roofs typically last 10 years longer than galvanized metal which lasts for about 20-30 years. If you live in a place with frequent rainfall or near a sea or ocean, Galvalume may save you from frequent repairs and replacement costs.
Installation and Maintenance of Galvalume vs Galvanized Metal Roof
Both roofing materials are easy to install, although Galvalume tends to be simpler due to its lighter weight. As for maintenance, Galvalume needs less attention. In contrast, galvanized metal may require frequent attention and care.
Conclusion
Suppose you are still confused after reading the comparison of Galvalume vs Galvanized Metal Roof. In that case, it ultimately boils down to three main considerations: budget, location, and expected longevity.
A galvanized roof is a better bet for an affordable option that won’t corrode quickly in low-corrosion environments; otherwise, Galvalume roofing provides superior performance and longevity over its counterpart at a higher cost.
Galvalume vs Galvanized FAQs
1. Which metal roof type offers greater long-term value?
Due to its longer lifespan and reduced maintenance expenses, Galvalume metal roofing offers greater overall cost-savings even with its initial higher upfront costs.
2. Can Galvalume and galvanized metal roofs both be painted?
Yes, both types can be customized to complement your building’s design; Galvalume tends to hold paint better due to its smoother surface.
3. Which metal should I choose for coastal environments?
Galvalume roofing metal provides superior corrosion protection compared to galvanized metal when applied near marine environments.
