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Galvalume steel is actually made up of base carbon/iron steel coated with an alloy of aluminum or zinc and forms galvalume steel. Since this material contains aluminum, which is corrosion-resistant, galvalume steel is also very corrosion resistant. This type of metal material is used in metal roof types, such as standing seams, majorly where minimal bending is required.

They are already very corrosion resistant, so they can be either installed, or they are coated with low-cost acrylic clear coat. The homeowners who wish to install shiny and bright roofs with a metallic look can prefer this for residential metal roofing. It is generally not a very expensive option. The 24-gauge thickness of galvalume steel is ideal for standing seam systems. The average weight ranges from 100 to 150 lbs. per square feet. The recycled content generally ranges from 35%.

Galvanized steel – steel is used in the roofing industry as the traditional carbon or other metals are prone to rust when exposed to certain elements. Steel is coated with a specific thickness of another metal or alloy on both sides of the base carbon or steel strip to protect from rusting. The process used to accomplish this is known as the hot-dip process. In this process, steel is run through a molten bath of metal to be applied. This hot-dip process is a comparatively cheaper and a good alternative to expensive electroplating.

The steels are basically classified on the basis of metal that has been applied. Galvanizes steel comprised of iron or carbon steel with a metallic coating of zinc metal. The coating material offers two main kinds of protection – galvanic or barrier. The galvanic type of barrier is a process of the self-sacrificial process where the coated metal gives it up rather than allowing the metal base to corrode. The second protection is a barrier type. In this, the coating type keeps the elements from reaching the base of the metal.

Galvanized steel is most commonly used in the metal roofing industry and is available in a majority of metal roofing profiles. The cost of galvanized steel metal roofing is less than the cost of many other roofing materials. Galvanized steel is strong and has the capability to hold paint. The scratches on galvanic steel are self-protected and or band-aided because of zinc metal that prevents rust. The life span of galvanized steel is largely dependent on the thickness of the coating applied.

The more amount zinc present, the greater will be the life span of the roof. G- 90 is the most common zinc thickness used for residential metal roofing systems. This means that .90 ounces of zinc are coated per square foot of the steel metal roof. Lesser grades include G-60 and G-30, which should be avoided for residential purposes. The specifications must be checked so that you are clear with the details.