Longevity and durability are the major selling points of a steel roof. With proper coating and installation, a steel roof can last for decades. But, how long does a steel roof last? Well, the average lifespan of a steel roof is about 40 years. This lifespan is for a traditional home roof that gets different experiences and weather during the four seasons.

Steel roof puncture resistance implies that the roof has fewer chances of having leaks. The durability of a steel roof enables it to remain strong even when exposed to harsh weather. Steel roof can lose its original paint during the 40 years. However, a simple repainting is what a steel roof needs to regain its original luster and shine.

Steel Roof Keeps Giving 

The roofing system of your building is important for its overall systemic health. The building provides shelter to the people that occupy it. However, it provides protection to the other components of the building too. By doing this, the roof increases the lifespan of the other components of your building too.

A steel roof can be enhanced with a coating that is designed to meet your geographic location needs as well as accessories like downspouts and gutters. These ensure proper collection of water and channeling down and eventually away from your building and its foundation. These roofing components work together to ensure that your building maintains its structural integrity for years.

Think about a steel roof lifespan this way, the lifespan of asphalt shingles roof is around 17 years. On average, re-roofing a home costs around $12. As such, during the 40 years’ average lifespan of a steel roof, you save about $24,000 on roofing materials. These figures are basically for a small residential building. That means savings will be higher for larger commercial and industrial buildings. It’s not surprising that steel roofing is very common in commercial and industrial buildings.

How to Get the Most from a Steel Roof

Steel roof might not be ideal for all buildings. As such, there are things that you should have in mind if you want to extend the lifespan of your steel roof.

Location or Climate 

Any roofing system should be designed and installed with the local climate in mind. Factors like wind load, snow load, and PH of precipitation should be considered when determining whether a steel roof is ideal for a building. Talk to your roofing contractor about these factors and how they can affect the lifespan of a steel roof to determine if it’s an ideal choice for you.


When it comes to choosing a roofing material, UV rays from the sun should not be ignored. A steel roof with a reflective coating is the best option if you want a roofing system that will enhance your building’s energy efficiency. Such a roof is called a cool roof because it reflects UV rays from the sun thereby protecting the house from heat gain. When the building fails to gain heat from the sun, your heating and cooling bills won’t be affected negatively.


Debris, decaying materials and dirt are some of the things that should be removed from a steel roof regularly to enhance its lifespan. It’s important that you keep leaves, branches, and twigs away from your steel roof as well as gutters during winter and fall. This ensures that rainwater moves down the steel roof to the gutters and downspouts freely. Blockages in this system can cause deterioration of your steel roof.


A coated steel roof comes with a warranty of about 40years. However, you may start noticing corrosion or fading signs on your steel roof when it nears the end of its life expectancy. Instead of tearing off your roof and replacing it, consider re-coating and repairing it. This will extend the life of your steel roof further.

Why Steel Roof Lasts Longer 

Both sides of steel roof have a protective barrier known as a metallic coating. This protects steel roof from rusting. The coating is underneath and it separate from the paint which gives the steel roof its color. Generally, there are two metallic coating types.

These are: 

These coatings provide protection to the iron found in a steel roof from oxidation when exposed to moisture and air. Because zinc is more active than iron, it oxidizes to form zinc oxide which acts as a protective barrier. This happens before iron becomes ferric oxide or rust.

Install Quality Steel Roof on Your Property 

It’s no secret that steel roof lasts longer than most roofing options in the current market. However, to get maximum returns from your investment in a steel roof, you should have a quality roof installed by the right experts. GT Roofing San Antonio Texas has been installing steel roofing structures for years. Our crew is trained, experienced, and equipped with the right tools to install a steel roof on any building.

Call us now to schedule a consultation or installation appointment with the leading steel roof contractors