Galvalume Roof Rusting

On top of the galvalume is a layer of stone texturing coated with acrylic resin that ensures a completely nonporous water proof uv resistant surface that won t rust or corrode.

Galvalume roof rusting.

Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel. 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. Corrosion is the death of metal roofing as we all know.

The one exception is when the coating is penetrated scratched or chipped by falling or blowing debris for example. Consequently galvalume and galvalume plus will resist rust the elements and fire while providing a sturdy and protective covering. 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.

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. Galvanized metal roofs may also be used by architects looking for a traditional rusted appearance in a new building. If your roof were to rust and it s under warranty then attempting to clean off or coat the rusted area may void your roof s. Via abc metal roofing.

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.