Galvalume Vs Galvanized Roofing

While galvalume can initially show signs of corrosion faster than galvanized it has a sacrificial property that will prevent the corrosion from growing whereas once corrosion has started on a galvanized panel it can continue to corrode until panel integrity is lost.

Galvalume vs galvanized roofing.

Galvanized metal and galvalume metal both create stunning looks on interior and exterior metal projects. Galvalume is offered in both bare and pre coated versions. Most galvalume like galvanized steel is coated. For these reasons galvalume metal roofs are much more popular.

When we looked gavalume vs galvanized roofing it s important to note galvanized metal roofing is similar to galvalume metal roofing in that the galvanized coating is protecting the steel underneath it from corrosion and rusting. Before the introduction of galvalume to the metal roofing industry in the late 20th century using galvanized sheet and coil was a common practice. Galvalume also has improved corrosion resistance but it also has better heat resistance thanks to the aluminum and silicone. The zinc acts as a protective layer to iron or steel to prevent rust.

Typically galvanized sheet roofs are used mainly for agricultural buildings where rust is less of an issue and costs must be kept low. From galvanized steel roofing to galvalume metal roofs both finishes reinforce metal s strength performance and increase its longevity. Galvanized metal roofs may also be used by architects looking for a traditional rusted appearance in a new building. Galvanized coating accomplishes this with the use of just zinc.

Galvalume is similar to galvanized steel but instead of coating the steel in zinc oxide it is hot dipped in a mixture of zinc aluminum and silicone. Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel. However because of the superior durability and corrosion resistance of galvalume 90 percent of the metal roofing and wall industry in the early 2000s transitioned from galvanized substrates to a galvalume substrate. This is known as a galvanized metal.

The one exception is when the coating is penetrated scratched or chipped by falling or blowing debris for example. Galvalume and galvanized steel roofing are affected differently by corrosion.