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.

How long does a galvanized steel roof last.

A properly installed metal roof typically will last as long as the house with an expected lifespan of 40 to 70 years and often a 30 to 50 year manufacturer s warranty to boot. Some of them could even get longer. Hot dipped galvanized lasts longer than some of the plated types that also have a polymer coating on top of them. When installed correctly a typical standing seam metal roof will last anywhere from 30 to 50 years.

Standing seam is the most popular residential metal roofing system featuring concealed fasteners. Decay rates vary from 0 2 microns to 3 microns per year depending on the variables above. 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. Which commonly lasts for about 70 years in many different environments.

On the other hand metal roofs such as steel shingles or aluminum could last for up to 50 years. Measurements of the actual consumption rate of the coating during the first few years of service provide good data for projecting a conservative estimate. Premium metals such as stainless steel titanium zinc and copper can last well over 100 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.

Galvanized steel intended for prolonged outdoor use should be hot dipped galvanized steel. 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. Traditional asphalt roofing materials have an estimated life expectancy of roughly 12 20 years. Metal roofs can last 40 70 years depending on the material.

Metal roofs are attractive durable and can last up to 70 years. 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. 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. 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.

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.