What to Know About Galvanized Steel Roofing Vs Galvalume Steel Roofs
The main difference between Galvalume and galvanized steel is the protective coating around each steel sheet. Galvanized steel is coated in zinc, while Galvalume is coated in zinc, aluminum, and silicone.
Whether you're buying a metal roof for your home, barn, or business, it’s important to understand the type of material you’re purchasing. Your roof protects you and your possessions from the elements, so selecting the best material for your specific needs is crucial. This requires knowledge of the different types of metal roofing available.
When you start the process of outfitting your building with a metal roof, you will likely encounter many unfamiliar terms. Two common ones are galvanized steel and Galvalume. Which one is best for your structure?
Galvanized Steel
Galvanized steel has been used in construction for nearly 200 years. The term was first used in France in 1836 when inventor Stanislas Sorel filed a patent for the galvanizing process.
Today, galvanized steel is created much the same way it was in Sorel's time. A piece of steel is cleaned and then dipped into molten zinc. The zinc hardens onto the steel, forming an extra protective coating. This coating helps the steel resist rust, corrosion, nicks, and dents.
Prepainted matt steel
Galvalume
In the 1970s, the U.S. shipbuilding company Bethlehem Steel decided to build upon Sorel's galvanizing process. They experimented with adding metals to molten zinc to create a mixture that would provide even greater protection. This experimentation led to the development of Galvalume.
Galvalume consists of a coating that is 55% aluminum, 43.4% zinc, and 1.6% silicone applied to a steel sheet. This coating offers superior protection against the elements, allowing Galvalume to outlast traditional galvanized steel.
In addition to its durability, Galvalume has a self-healing feature. If the steel begins to rust along a cut or exposed edge, the coating can prevent the rust from spreading, ensuring long-term resilience.
Galvalume steel coil
Galvanized vs Galvalume Roofing
The main difference between Galvalume and galvanized steel is the protective coating around each steel sheet. Galvanized steel is coated in zinc, while Galvalume is coated in zinc, aluminum, and silicone.
Both are excellent for roofing, and each has pros and cons. Galvalume is a much longer-lasting material, with a lifespan about twice that of galvanized steel. Galvanized steel tends to cost less (while still delivering great protection), making it a suitable choice for buyers on a budget.
What's the Right Choice: Galvanized vs. Galvalume Roofing?
When choosing between galvanized steel and Galvalume roofing for your roofing project, it's crucial to ensure that your structure is suitable for a metal roof and that you're using the material appropriately.
Galvanized Steel
Galvanized steel is ideal for agricultural spaces such as barns or storage buildings, as well as residential homes. Its extra durability offers superior protection from the elements. Additionally, galvanized steel can be painted to match your building's design or aesthetic.
Galvanized steel coil
Galvalume Steel
Galvalume steel is also excellent for residential homes, commercial buildings, and agricultural spaces. It is particularly beneficial in areas prone to extreme weather conditions. The enhanced protection from Galvalume ensures your roof remains in good condition despite years of exposure to snow, rain, high winds, and varying temperatures.
Consulting an Expert
It's always best to consult with a local expert experienced in both Galvalume and galvanized steel. An experienced professional can provide the best recommendation based on your building's intended use and the local weather conditions.
Conclusion
Regardless of your choice, a steel roof will last longer and offer more protection than wood or asphalt shingles. With a steel roof, whether galvanized or Galvalume, you can enjoy durability, safety, and energy efficiency for years to come.
