Galvalume Vs Galvanized Metal Roof

Instead of 100 zinc the dip is 55 aluminum 43 5 zinc and 1 5 silicon.

Galvalume vs galvanized metal roof.

This is known as a galvanized metal. The zinc ions bond with iron molecules in the steel to create a shiny rust resistant finish on its surface. Aluminum is a metal that naturally resists corrosion and reflects heat too. The coating is created by dipping the straight sheet in hot molten zinc.

Similar to galvanized steel galvalume is produced by a hot dip process. The combination of aluminum and zinc is used once again as a protective layer to the steel. Standing seam metal roofs are commonly made from a material called galvalume which is steel that has been super galvanized this super galvanizing coating is an aluminum zinc alloy. Galvalume is more corrosion resistant than galvanized steel but because aluminum provides barrier protection instead of galvanic protection scratches and cut edges are less protected.

Most galvalume metal roofs come with a 25 year warranty if the metal roofing manufacturer is using galvalume with a full az55 coating. The answer lies in the difference between the two. Typical g90 galvanized metal roofing can cost anywhere from 5 00 to 13 00 per square foot and can fluctuate further based on thickness color installation costs location and more. Studies show that when used on a residential house that a galvalume metal roof will outlast a galvanized metal roof by almost double.

Galvalume is aluminum and zinc coated steel. Galvanized while both products were developed to essentially sacrifice themselves to protect the steel sheeting they coat the above exposure comparison shows that galvalume performs up to nine times better in fighting corrosion as compared to galvanized coating. The zinc acts as a protective layer to iron or steel to prevent rust. Galvalume is offered in both bare and pre coated versions.

Galvalume is roughly twice as resistant to rust and corrosion as the steel used for corrugated metal roofing because of this special galvanizing process. Traditional galvanized metal roofing is a corrugated sheet of carbon steel with a galvanized coating. Zinc bonds with the steel surface to create a barrier to corrosion causing moisture. Iron or steel can be coated with zinc.

Galvalume metal roofs offer better surface protection than galvanized roofs however they re more vulnerable to scratches blemishes and cut edges.