Galvalume Metal Roofing Types

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.

Galvalume metal roofing types. How long do metal roofs last. On average they have a 40 to 70 year life span depending on the type of metal used the harshness of the local climate and the skill of the installer. Use galvalume for a sophisticated metal accent on office buildings rustic and modern homes or in industrial style restaurants. We would not recommend using galvalume panels with exposed fastener steel roofing systems such as corrugated or ribbed steel roofs.

Galvalume steel is best for use in prefabricated metal wall panels and standing seam metal roof applications with concealed fasteners. It is a trademarked name but many people use it as a generic term to describe a metal roofing product consisting of steel coil coated with a metal alloy. This coating helps extends the life of a steel panel and slow the corrosion process. Normally galvalume is offered in both bare and pre coated pre painted versions.

Here s a side by side comparison of metal roofs and other common roofing materials. Galvanized galvalume and weathering steel. Galvalume is a 55 al zn coated sheet steel product that is ideally suited for most types of roofing and siding applications as well as unexposed automotive parts appliances and miscellaneous applications like furniture outdoor cabinetry computer cases gutters pipe etc. Galvalume roofing material combines three of the most important metals used in roofing today steel aluminum and zinc.

That s two to six times the cost of an asphalt roof. Galvanized steel is actually created by using a layer of zinc to protect an inner layer of steel from corrosion. Manufacturers begin with a carbon steel base sheet that is then continuously hot dipped with aluminum and zinc alloys until it reaches a coating consisting of 55 aluminum 43 4 zinc and 1 6 silicone. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel.

That alloy is 45 zinc and 55 aluminum and looks similar to galvanized steel but the visible crystals are smaller and close together giving it a smoother appearance. There are 3 primary types of steel roofing. When selecting a roofing material there are many factors to take into consideration beyond installation cost.