Galvalume Or Galvanized Roof

Galvalume metal roof and siding panels are coated with a mixture of zinc and aluminum and siliconized coating to help resist scuffs and fingerprints better than a bare metal product.

Galvalume or galvanized roof.

Most galvalume like galvanized steel is coated. The one exception is when the coating is penetrated scratched or chipped by falling or blowing debris for example. For these reasons galvalume metal roofs are much more popular. Typically galvanized sheet roofs are used mainly for agricultural buildings where rust is less of an issue and costs must be kept low.

Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel. Galvanized while both products were developed to essentially sacrifice themselves to protect the steel sheeting they coat the above exposure comparison shows that galvalume performs up to nine times better in fighting corrosion as compared to galvanized coating. Galvalume and galvanized steel roofing are affected differently by corrosion. The zinc acts as a protective layer to iron or steel to prevent rust.

Galvanization or commonly referred to as galvanized is a protective zinc coating that is applied to a steel or iron substrate through a hot dip galvanizing process. Galvalume is more corrosion resistant than galvanized steel but because aluminum provides barrier protection instead of galvanic protection scratches and cut edges are less protected. Before the introduction of galvalume to the metal roofing industry in the late 20th century using galvanized sheet and coil was a common practice. From galvanized steel roofing to galvalume metal roofs both finishes reinforce metal s strength performance and increase its longevity.

Galvalume is offered in both bare and pre coated versions. Galvanized metal roofs may also be used by architects looking for a traditional rusted appearance in a new building. Most galvalume metal roofs come with a 25 year warranty if the metal roofing manufacturer is using galvalume with a full az55 coating. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel.

This is known as a galvanized metal. Galvanized metal and galvalume metal both create stunning looks on interior and exterior metal projects.