When the base materials oxidize they create a protective patina.
Lifespan galvanized metal roof.
Metal roofing runs the gamut of price and quality starting around 115 per square for standing seam panels in aluminum or steel.
While other roofing materials typically need replacement every 10 to 20 years properly installed steel roofs should last as long as you own your home.
Materials used in corrugated metal roofing corrugated metal roofing is normally made from metals such as stainless steel copper zinc and aluminium.
The most common metal roof material we see in this area is galvalume which is a steel sheet with an electrolytically applied coating of a combination of zinc and aluminum to extend the lifespan.
Roofing of this kind has many advantages over asphalt roofs and has a life span from 20 to 100 years depending on grade.
The lifespan for unpainted galvanized roofing is 15 25 years depending on climate less where oceanic salt spray is common.
The galvanized roof depending on climatic factors might show a light rust hue.
Metal roofs are attractive durable and can last up to 70 years.
The expected lifespan of a metal roof is 30 to 50 years in florida with an average of 40 years.
Unpainted galvalume has a lifespan up to 40 years.