What is Galvalume and Galvalume Plus?
Galvalume is the name of the coating applied to bare sheet steel products that acts as a two-punch barrier to the elements. It is comprised of 55% aluminum, 1.6% silicon and 43.4% zinc. The coating is applied to the base metal in a continuous hot dip method. The product is described in ASTM-792, coating classes of AZ 50, AZ 55 and AZ 60. These classes equate to an average minimum coating thickness of .50, .55 and .60 ounces per square foot.
Why is Galvalume better than galvanized coated steel sheets?
After 23 years of continuous exposure to the real world of: severe marine, agricultural, industrial and rural environments Galvalume® proved more durable than comparably coated G-90 galvanized steel products. (G-90 = .9 oz. coating per sq. ft. of zinc) It actually out performed G-90 galvanized products in the same environments by two to four times. In other words, they resisted corrosion that much better.
Old Towne Gray