Galvalume Vs Galvanized Metal Roof

Galvalume is offered in both bare and pre coated versions.

Galvalume vs galvanized metal roof. For example a galvalume section that is 16 x3 known as a classic rib steel roof panel is 29 gauge steel and comes with a 25 year warranty. Details about galvanized metal roofing are at galvanized steel roofs. Also galvalume costs more than galvanized metal roofing but the fact that a galvalume metal roof will last up to twice as long as a galvanized roof of the same thickness could make up the difference. Galvalume metal roofing system properties.

Also sold under the trade names zincalume and galval galvalume was developed in the early 1970s. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel. Galvalume steel comes in various gauges that determine the quality and price. Az55 galvalume mill finish acrylic coated is what we use to manufacture at buy metal roofing direct.

Paint finish warranties are key to understanding the expected longevity of a galvanized or galvalume metal roof. For these reasons galvalume metal roofs are much more popular. Final thoughts on galvalume vs. Paint does not adhere as well to galvalume so the aesthetics may not be as good.

Az55 is the galvalume thickness required to carry a 25 year warranty. The rust on galvanized will just continue to spread and get worse because it doesn t have that self healing property. The big difference is that aluminum will oxidize chalk if exposed to the elements but the aluminum will not look unsightly and continue on with a. Most galvalume like galvanized steel is coated.

Aluminum roofing comes with paint finishes as well and have their own warranties. But galvalume has an excellent performance life in bare exposures as well. The problem with galvanized metal painted or not is that once it starts to red rust it doesn t eventually stop as galvalume does. Via abc metal roofing.

Also see complete list of types properties of metals used in roof systemsfor more about galvanized steel roofing. As stated by some of the world s leading steel companies glavalume has at least twice the corrosion resistance over galvanized coatings of the same thickness and. Both galvanized steel and galvalume weigh 100 to 150 pounds per 100 square feet and contain about 35 recycled materials. The one exception is when the coating is penetrated scratched or chipped by falling or blowing debris for example.

Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel. Galvalume and galvanized steel roofing are affected differently by corrosion.