Galvalume Or Galvanized Roof

From galvanized steel roofing to galvalume metal roofs both finishes reinforce metal s strength performance and increase its longevity.

Galvalume or galvanized roof.

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. 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. Most galvalume like galvanized steel is coated. Galvalume and galvanized steel roofing are affected differently by corrosion.

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. Iron or steel can be coated with zinc. The one exception is when the coating is penetrated scratched or chipped by falling or blowing debris for example. 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.

Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel. This is known as a galvanized metal. Galvanized metal roofs may also be used by architects looking for a traditional rusted appearance in a new building. For these reasons galvalume metal roofs are much more popular.

Galvanized metal and galvalume metal both create stunning looks on interior and exterior metal projects. Most galvalume metal roofs come with a 25 year warranty if the metal roofing manufacturer is using galvalume with a full az55 coating. Galvalume is offered in both bare and pre coated versions. 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 is more corrosion resistant than galvanized steel but because aluminum provides barrier protection instead of galvanic protection scratches and cut edges are less protected. Studies show that when used on a residential house that a galvalume metal roof will outlast a galvanized metal roof by almost double.