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.
Lifespan galvanized metal roof.
Metal roofs are attractive durable and can last up to 70 years.
This is especially true when you invest in a metal roof engineered from galvanized steel.
The expected lifespan of a metal roof is 30 to 50 years in florida with an average of 40 years.
When the base materials oxidize they create a protective patina.
The lifespan for unpainted galvanized roofing is 15 25 years depending on climate less where oceanic salt spray is common.
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.
The galvanized roof depending on climatic factors might show a light rust hue.
This is the result of the zinc layer wearing away leaving the steel substrate exposed.
Unpainted galvalume has a lifespan up to 40 years.
Roofing of this kind has many advantages over asphalt roofs and has a life span from 20 to 100 years depending on grade.