How Long Does A Galvanized Steel Roof Last

Metal roofs can last 40 70 years depending on the material.

How long does a galvanized steel roof last.

Metal roofing runs the gamut of price and quality starting around 115 per square for standing seam panels in aluminum or steel. Hot dipped galvanized lasts longer than some of the plated types that also have a polymer coating on top of them. Traditional asphalt roofing materials have an estimated life expectancy of roughly 12 20 years. Metal roofs are attractive durable and can last up to 70 years.

Table 1 below predicts how long galvanized steel will last based on a 30 month corrosion study of environmental factors like wetness humidity and air pollutants in 2004. Which commonly lasts for about 70 years in many different environments. When installed correctly a typical standing seam metal roof will last anywhere from 30 to 50 years. Overall the bed s frame constructed of wood on the outside that is taken care of with regular maintenance should last 30 to 120 years.

The corrosion resistance of hot dip galvanizing varies according to its surroundings but generally corrodes at a rate of 1 30 of bare steel in the same environment. You will never need to install another roof in the future. Metal roofs such as aluminum or steel shingles can last for 50 years and often longer while copper and zinc roofs can often last well over 100 years. Hot dip galvanizing hdg is often used to protect steel from corrosion in some of the harshest environments imaginable yet it provides maintenance free longevity for decades.

A corrugated metal roof is incredibly cost effective durable and sturdy and has long been the preferred material for roofing for agricultural and industrial buildings. Zinc and copper roofs offer 100 years of longevity. Decay rates vary from 0 2 microns to 3 microns per year depending on the variables above. Measurements of the actual consumption rate of the coating during the first few years of service provide good data for projecting a conservative estimate.

Some of them could even get longer. In comparison to an ordinary roof covered with asphalt shingles a corrugated metal roof can last up to three times as long as asphalt or 25 to 60 years. On the other hand metal roofs such as steel shingles or aluminum could last for up to 50 years. This means that a typical metal roof will last about 3 7 times longer than a typical asphalt shingles roof which usually needs to replaced every 12 17 years.

Standing seam is the most popular residential metal roofing system featuring concealed fasteners.