You should consider getting steel panels with a zinc aluminum or galvalume coating.
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Some specifics to keep in mind.
Avoiding galvanized corrosion starts with your choice of metal roofing.
The primary metals of concern in terms of galvanic corrosion contact with copper are aluminum and zinc.
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By replacing the galvanizing process in metal roofs galvalume allows for a better more effective protective layer that eliminates the potential for corrosion.
Copper is another metal that does not react well with galvanized metal panels used in many metal roofing systems.
According to roofing experts there are three kinds of metals that can kick start galvanic corrosion.
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Built for beauty durability and value the metal built for beauty durability and value the metal sales classic rib is a hard working roof panel that performs in all seasons.
Corrugated ribs give this metal roofing panel strength and structural integrity.
Galvalume has an excellent performance lifespan in bare exposures unpainted panels as well.
Avoid using treated lumber or cables that have copper wiring instead of aluminum.
Copper is a metal that doesn t react well with galvanized metal panels it s important that you keep the contact between them to a minimum.
Two popular roofing materials that use this process of binding two or more dissimilar metals are referred to as galvanized and galvalume each of which use steel as the base metal.
This is known as a galvanized metal.
Most residential grade galvalume metal roofing products like galvanized steel are coated with kynar 500 or hylar 5000 paint finishes.
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The zinc acts as a protective layer to iron or steel to prevent rust.
The first is copper.
Don t use treated lumber which has copper in it.
Also avoid using copper and some brass fasteners with aluminum zinc and most ferrous metal.
Large differences in the thermal expansion rate between copper and these metals may cause additional problems.
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