Aluminum has tremendous corrosion resistance so it will generally corrode more slowly than galvanized steel.
Galvanized steel roofing material.
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The aluminum better protects against corrosion in certain environments than galvanized and also provides a smaller smoother spangle for a more uniformed appearance.
Galvalume steel is similar to galvanized but rather than using a primarily zinc coating galvalume uses a combination of aluminum and zinc.
This coating helps extends the life of a steel panel and slow the corrosion process.
Corrosion is the death of metal roofing as we all know.
Galvanized steel is the most common form of steel roofing material.
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Galvanized steel is a low maintenance product that is known for durability light weight for ease of use or transport.
Galvalume and galvanized steel roofing are affected differently by corrosion.
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Cuts easily with common aviation snips corrugated panels will not rot mildew or warp and can form an effective pesticide free barrier against termites and other insects.
In most cases when someone refers to galvanized metal roofing they are specifically referring to an inner metal layer of iron and carbon alloy steel that has been dipped in a hot zinc bath and is now coated with a thin layer of the material.