A metal roof’s life expectancy varies by its type. For example, standing seam metal roofs last between 50 and 75 years. In contrast, a screw-down panel metal roof lasts only 20-30 years.
Of course, dozens of additional variables influence a metal roof’s longevity, which we’ll outline in this post.
Key Takeaway
Metal roofing life expectancy is 75 years for a standing seam metal roof. Other metal roof types, like screw-down panel roofs, last only 20-30 years.
Metal Roofing Life Expectancy by Type
The first thing you should know is that there are different types of metal roofs. Each type has a different life expectancy because of how it is built and can withstand conditions.
So, let’s take a brief look at each one and their average life expectancy:
Standing Seam Metal Roofs
A standing seam metal roof consists of metal roofing panels joined at an underlying seam. Its vertical, trapezoidal legs conceal the seam underneath, which gives this type of roofing its name. The design also offers this type of metal roofing, which is incredibly durable.
You can expect a standing seam metal roof to last for at least 30 years. Most standing seam metal roofs last for much longer than that, though. Under the right conditions, expecting your standing seam metal roof to last between 50 and 75 years is not outrageous.
Screw-Down Panel Metal Roofs
Screw-down panel metal roofs are usually made of corrugated steel or aluminum and feature a series of exposed screws. It’s the screws that hold the metal panels to the roof decking. Because the screws are exposed, screw-down panel metal roofs aren’t as durable or reliable.
Panel metal roofs also don’t perform as well as standing seam roofs because the metal panels aren’t allowed to expand and contract. Generally, you can expect 20-30 years from a screw-down panel metal roof.
Screw-down panel metal roofs also don’t look as clean, modern, or nice as standing seam metal roofs. While installing a standing seam metal roof may cost you a bit more, it’s better if you can afford it.
Why Choose A Metal Roof?
You may have thought that metal roofs were just for barns, silos, and commercial buildings. And if this were 1990, you would have been right.
Today, metal roofs are a viable option for residential buildings. There are many benefits to metal roofing, including:
Eco-Friendly
Some metal roofing products contain as much as 95% recycled metal. And once a metal roof needs to be replaced, 100% of the materials can be recycled.
As a result, metal roofing is one of the most environmentally responsible roofing materials, making it an excellent choice for anyone who is conscious or concerned about their impact on the environment.
Wind-Resistant
If you live in an area pounded by high winds, you may want to consider metal roofing. On average, a metal roof can withstand winds up to 140 mph.
However, some types of metal roof systems and materials can withstand winds as fast as 180 mph!
Flame-Retardant
Metal roofing can withstand wind, fire, and hail. It is also flame-retardant, so it guards against spreading flames in a fire, which can also benefit your insurance.
A metal roof in some regions of the country is estimated to save you up to 30% on your homeowner’s insurance policy a year.
Other Factors That Contribute to the Lifespan of A Metal Roof
We touched on it a bit in the previous section, but now it’s time to take a detailed look at what can affect the lifespan of a metal roof:
Installation
The installation is the most critical contribution to the lifespan of your metal roof – whether that lifespan is long or short. Standing seam metal roofs especially need to be installed very carefully and meticulously.
You should always work with a licensed and experienced roofing contractor for standing seam metal roof installation. Furthermore, you should make sure that the contractor you are considering hiring has specific experience with standing seam metal roofs.
Paint
Some metal roofs can be coated with a Kynar 500 finish. In layman’s terms, it’s pretty much just paint. But it can significantly increase the lifespan of your metal roof.
Usually, Kynar 500 is only used on standing seam metal roofs, yet another reason to choose this roofing over screw-down panel metal roofing.
Even the application of the finish is essential, though. While applying, the contractor should clean the paneling at the end of each day to prevent rusting.
Ventilation
The ventilation in your attic will significantly affect any roof you have on top of it, including metal roofing. If your attic is improperly ventilated, it can strain the roofing materials more.
As a result, it may expand and contract more than usual, develop ice dams, or be exposed to moisture.
You should inspect your attic regularly to ensure that the insulation strips are intact and there are no signs of moisture damage, and check for leaks.
Weather
The weather will significantly impact how long your metal roof lasts. If you live in an area with mild weather (no high winds, little to no hail, moderate rain, little to no snow, and moderate heat), your metal roof can last well over 50 years.
Conversely, if your area experiences extreme weather, you should expect to repair or replace your metal roof after about 30 years.
Maintenance
Most experts agree that you should have your roof inspected once a year. Does this apply to standing metal seam roofs, too? Yes, it does. You can’t see certain things that a professional inspector will notice.
Regular maintenance will ensure that your metal roof (if installed correctly) will go the distance – even if you live in an area that experiences extreme weather.
Conclusion on Metal Roofing Life Expectancy
Metal roofing can last up to 75 years when installing a standing seam metal roof. Other types of metal roofs, like screw-down panel roofs, age faster and last only 20-30 years. Ultimately, your roof’s longevity will depend on variables like installation, ventilation, climate, and weather.
