Galvalume Roof Coating

A measure of the success of this program is the fact that virtually all of the major steel companies worldwide have become licensees of biec.

Galvalume roof coating.

The coating weight of the product is preceded by az which is the designation for galvalume. Normally the term used is galvanized steel but. Galvalume has a coating of aluminum over the steel and will likely take more time for rust to occur at the exposed locations of the panel. Galvanization only includes the zinc alloy.

Is the worldwide licensor of the technology and know how associated with 55 aluminum zinc alloy coated sheet steel better known as galvalume. However wear occurring along the roof s drip edge where all the water and snow run off will eventually wear away the aluminum coating once the paint finish fails and rust will ensue. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel. Normally galvalume is offered in both bare and pre coated pre painted versions.

Nearly all steel has a protective coating to prevent corrosion. A clear organic resin coating is applied to both sides of the substrate using sophisticated reverse roll coaters. Galvalume az steel is a coated product contains approximately 55 percent aluminum 43 percent zinc and 2 percent silicon. Galvalume is created using a 55 to 45 ratio of aluminum to zinc alloy with a small amount of silicon to ensure durable and even adhesion.

Before the introduction of galvalume to the metal roofing industry in the late 20th century using galvanized sheet and coil was a common practice. 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. Arcelormittal galvalume plus is an unpainted steel sheet product that starts with our galvalume substrate and its highly corrosion resistant 55 aluminum 45 zinc alloy hot dipped coating. Most residential grade galvalume metal roofing products like galvanized steel are coated with kynar 500 or hylar 5000 paint finishes.

Steel coated with galvalume appears similar to galvanized steel but with a smoother appearance. Galvalume has an excellent performance lifespan in bare exposures unpainted panels as well. Coated metal roof panels have progressed from a single coat straight polyester paint system in the early years to poly vinyl idene fluoride pvdf acknowledged as the premium resin for coil coatings. The aluminum is what differentiates galvalume from galvanized steel.