Galvalume coated steel roofing panels are protected by layers of metallic and polymer coatings. Industry studies have repeatedly shown them to outperform the corrosion resistance of other coated metals. They are available with warranties as long as 40 years not to crack, chip, peel or fade.
Metal roofs are painted with high-performance polymers that have exceptional weathering properties. Over time you might notice a slight change in color due to the settling of airborne contamination, but occasional rain or washing the roof with a garden hose (from the ground) will keep the roof looking like new. There is also a 25 year warranty on corrosion.
Metal roofing is no more susceptible to lightning than any other roofing material. Lightning most frequently strikes the highest point in any terrain; and if your roof is at the highest point of the surrounding terrain, you can install lightning rods. A metal roof is the most fire safe roof. It is classified as a noncombustible roofing material with a Class “A” rating – the highest rating given.
Usually not if you’re installing the metal roof over existing asphalt shingles (maximum of one layer thick). In most situations, the metal roof can be installed directly over the old roof, adding an extra layer of insulation.
Galvalume is 55% AI-Zn (aluminum – zinc) coated sheet steel that is ideally suited for most types of roofing applications. An estimated 40 billion square feet of galvalume now covers buildings in all kinds of climates and environments throughout the United States, Canada and Mexico, as well as Europe, Asia and Australia. Galvalume is an ideal material for roofing because of its extraordinary outdoor corrosion resistance and resulting long life. It is extremely popular due to its versatility, ease of use, aesthetics and long-term performance.