Galvalume Roof Coating

A clear organic resin coating is applied to both sides of the substrate using sophisticated reverse roll coaters.

Galvalume roof coating.

Most residential grade galvalume metal roofing products like galvanized steel are coated with kynar 500 or hylar 5000 paint finishes. Galvanization only includes the zinc alloy. 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.

Nearly all steel has a protective coating to prevent corrosion. The aluminum is what differentiates galvalume from galvanized steel. Is the worldwide licensor of the technology and know how associated with 55 aluminum zinc alloy coated sheet steel better known as galvalume. Steel coated with galvalume appears similar to galvanized steel but with a smoother appearance.

Major applications are for metal building components including roofs side sheets and structural members. 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. 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. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel.

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. The coating used on galvalume is very important because it is critical to the length and conditions of the entire warranty of the panel product. Normally the term used is galvanized steel but. 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.

The coating weight of the product is preceded by az which is the designation for galvalume. Galvalume az steel is a coated product contains approximately 55 percent aluminum 43 percent zinc and 2 percent silicon. 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. Galvalume has an excellent performance lifespan in bare exposures unpainted panels as well.