Galvalume Or Galvanized Roof

Studies show that when used on a residential house that a galvalume metal roof will outlast a galvanized metal roof by almost double.

Galvalume or galvanized roof.

For these reasons galvalume metal roofs are much more popular. 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. This is known as a galvanized metal. From galvanized steel roofing to galvalume metal roofs both finishes reinforce metal s strength performance and increase its longevity.

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. Galvanized metal roofs may also be used by architects looking for a traditional rusted appearance in a new building. Galvalume and galvanized steel roofing are affected differently by corrosion. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel.

The zinc acts as a protective layer to iron or steel to prevent rust. The one exception is when the coating is penetrated scratched or chipped by falling or blowing debris for example. Iron or steel can be coated with zinc. Most galvalume like galvanized steel is coated.

Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel. Before the introduction of galvalume to the metal roofing industry in the late 20th century using galvanized sheet and coil was a common practice. Two popular roofing materials that use this process of binding two or more dissimilar metals are referred to as galvanized and galvalume each of which use steel as the base metal. Galvalume is offered in both bare and pre coated versions.

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. Most galvalume metal roofs come with a 25 year warranty if the metal roofing manufacturer is using galvalume with a full az55 coating.