Galvalume adds a protective coating to steel sheet. Combining aluminum, silicon, and zinc, galvalume provides outstanding rust protection. Galvalume metal roofing and metal paneling are two of the most common building products for galvalume metal, but it can also be used in other outdoor applications. Whatever the outdoor environment, galvalume metal shows superior resistance to corrosion than standard galvanized steel. It also resists corrosion when exposed to snow, ice, and rain. In effect, galvalume increases both the durability and longevity.
GNEE Steel supplies galvalume grades CS-A, CS-B, grade 50 and grade 80. CS Type A and CS Type B are both commercial steels with a carbon, phosphorous, manganese, sulphur, and iron chemical composition. G50 and G80 are both zinc-coated on both sides. These two grades are the most popular galvalume metals for building products. The numbers 50 and 80 reference the zinc coating weight using the unit ounces per square foot (oz/ft2). Of these two galvalume metal grades, grade 80 provides enhanced corrosion resistance.
Galvalume metal coil
Advantages:
Resistance to corrosion is the main advantage of galvalume metal. Its signature, high performing zinc-aluminum-silicon coating holds up in rain, ice, snow and where high temperatures are common, surpassing the protection provided by galvanized and galvannealed metal. Galvalume metal roofing and galvalume metal paneling are best suited for industrial and residential applications.
Disadvantages:
Galvalume metal roofing should not be used in coastal environments, high contact environments with animals or animal waste, and it should not be placed in or near concrete, copper, bricks, or treated lumber which might cause galvanic corrosion. Consequently, when selecting galvalume for your metal roofing it's recommended that you ensure material compatibility with any surrounding components.