Metal roofs can last 40 to 70 years, depending on the material quality, climate, maintenance, and other external factors. The durability and energy efficiency of metal roofing make it a popular option for commercial properties and even homes in Mankato, MN.
In this post, we discussed the longevity of metal roofs, factors affecting its lifespan, and signs that it needs to be replaced. Keep reading and see if your metal roof is still in tip-top condition!
What is the lifespan of a metal roof?
On average, a properly installed and maintained metal roof can last between 40 and 70 years. In fact, high-quality metal roofing systems can even reach up to 100 years of service life.
This impressive lifespan is much longer than other roofing materials, such as asphalt shingles, which typically last 15 to 30 years, or traditional clay or concrete tiles, which may last 50 to 100 years.
Still, not all metal roofs are made equal. Here’s a quick roofing materials comparison based on type and lifespan:
- Steel. Galvanized steel roofing lifespan range from 40 to 70 years.
- Aluminum. When it comes to the lifespan of aluminum vs. steel roofing, aluminum lasts a few years less for about 40 to 60 years.
- Copper. When choosing between aluminum roofing vs. copper roofing, you should consider copper roofs since they last for 70 to 100+ years.
- Zinc. Zinc roofs have a self-healing property that prevents rust and allows them to last for 80 to 100+ years.
- Tin. Tin roofing lasts for 40 to 50 years, much shorter than other metal roofs since it’s more prone to corrosion.
- Lead. Mainly used for detailing and flashing, lead roof materials last for 50+ years.
What affects the durability of a metal roof?
Just like any roofing material, metal is not invincible to damage. Here are some of the factors that impact its longevity:
1. Weather
How does the weather impact the lifespan of a metal roof? The combination of rain, moisture, snow, UV exposure, and winds will accelerate any metal roof’s degradation.
This is very evident in Mankato and Madison Lake, which get very harsh winters that can easily rust a low-quality metal roof. The weather resistance of metal roofs in Minnesota should be a major consideration when getting a replacement.
2. Coating
Added metal roof coatings and sealants are some of the best ways on how to prevent corrosion on this roof material. Coatings like zinc, aluminum-zinc, PVDF, and paint help reduce the impact of extreme outdoor elements.
Generally, zinc or galvanized metal roofs have the least level of rust protection. Meanwhile, powder and Polyvinylidene Fluoride (PVDF) coatings help metal roofs last the longest.
3. Maintenance
Does a metal roof need maintenance? Yes, and a lack of it can speed up its deterioration in a few years. For example, letting debris like leaves and dirt sit on a metal roof for long will trap moisture and harbor rust.
At the same time, putting off repairs will expose your metal roof to further damage, especially in extreme weather.
4. Installation
Installation factors that affect roof longevity include seam and joint quality, proper fastening, flashing installation, and panel alignment, among others. If not done properly, these components will compromise the metal roof’s integrity and overall lifespan.
This is also the same reason why you should hire a professional roofing company for metal roof installation in North Mankato, MN. Licensed local roofers will ensure your metal roof is installed to last.
5. Roof design
Metal roofs with flatter slopes tend to trap rainwater and ice dams, which will increase the risk of corrosion. Also, metal roofs with many joints, valleys, and penetrations have more potential leak points that will reduce their lifespan.
Aside from that, attic ventilation also impacts a metal roof’s risk for corrosion. Good ventilation wicks away moisture to minimize rusting.
6. Physical impact
Understanding how hail affects metal roof durability will give you a better idea of Mankato’s weather impact to metal roofs. It can cause dents, cracks, and coating damage, which will expose bare metal to corrosion and faster deterioration.
At the same time, falling debris, such as tree branches, will also reduce the lifespan of your metal roof. The same goes for improper snow removal, which is very common during Minnesota winters.
Signs that a metal roof needs replacement
Metal roofs last long, but some may need replacements faster than others. Here are some tell-tale signs that you need to start contacting local roofers for metal roof replacement in North Mankato, MN:
1. Heavy physical damage
Physical damage from storms, falling debris, or foot traffic can cause punctures or tears in your metal panels. This will eventually cause leaks and exposure to harsh elements that will worsen the damage. In this case, you should start scouting for the best metal roofing companies in North Mankato, MN, like Boelter Is Better.
2. Widespread rust and corrosion
Small rusted spots aren’t usually a major problem for metal roofs. However, widespread corrosion weakens the metal panels, leading to holes and leaks. Spotting rust early can sometimes mean repairs are possible, but widespread corrosion usually means it already needs a replacement.
3. Recurring leaks indoors
Water stains, mold, or dampness inside your home often point to leaks in your metal roof. These leaks typically occur due to damaged seams, fasteners, flashing, or rusted areas. Recurring and major leaks suggest your roof’s protective barrier is already damaged, which may require a full replacement.
4. Old roof age
Residential metal roofing in North Mankato, MN, lasts for about 40 to 70 years. If your metal roof is already older than this range, you should consider investing in a full replacement. This is to ensure that your roof is in the best shape before the next winter season.
5. Warping or sagging panels
Warped, buckled, or sagging panels suggest structural issues or water damage to the roof deck. These problems can compromise your metal roof’s ability to ward off harsh outdoor elements and could mean that a replacement is necessary.
How to extend the life of a metal roof
To ensure that your metal roof will stand the test of time, you should keep the following roof lifespan maintenance tips in mind:
- Regular inspections. You should schedule annual inspections with licensed metal roofing contractors in Madison Lake, MN, or Mankato, MN. This way, roofers can spot early signs of damage before they get worse.
- Keep the roof clean. Regular cleaning is one of the simplest yet most effective ways to extend the life of your metal roof. Dirt, debris, leaves, and organic material can accumulate on the roof’s surface, trapping moisture and promoting corrosion or rust. Make sure you clean them up or hire a professional to do it for you.
- Apply protective coatings. Coatings such as elastomeric paint or silicone sealants create a barrier against moisture, UV rays, and chemical pollutants. These coatings are effective for rust prevention for metal roofs, helping extend their lifespan.
- Avoid walking on metal roofs. If possible, avoid walking on your metal roof as this causes dents, warping, and damage to the coating. If you have to perform minor repairs, always walk on support points to minimize damage. Or better yet, consider hiring a local metal roofing repair in Madison Lake, MN.
Looking for long-lasting metal roofs?
When it comes to durable and affordable metal roofing services in North Mankato, MN, Boelter Is Better is the trusted choice. We’ve been in the industry for 30+ years and have transformed thousands of houses in Southern Minnesota with our exteriors made to last.
At Boelter Is Better, you can get long-lasting roofing, windows, and siding without the huge upfront cost. We offer financing options via PowerPay, so you can get your dream home improvement with affordable monthly payments. Contact us today to get your rate!
Metal roof longevity FAQ
Can a metal roof last 50 years or more?
Yes, most metal roof materials can last for over 50 years with proper maintenance and installation. Still, you should note that external factors, such as weather, will impact your metal roof’s longevity.
Do metal roofs last longer than shingles?
When it comes to the lifespan of metal roofing vs. asphalt shingles, metal roofs tend to last longer. On average, shingle roofs last for 20 to 30 years, while metal roofs can last for 100+ years.
Do metal roofs fade over time?
Yes, metal roofs are prone to fading, especially when exposed to direct sunlight. UV rays will break down its coating, causing it to fade and look dull.
Does color affect metal roof lifespan?
Yes, the color of a metal roof can affect how long it lasts because it changes how much heat the roof absorbs. Darker colors soak up more sunlight, making the roof hotter. This extra heat causes the metal to expand and contract more, which, over time, can wear out the roof’s materials, paint, and fasteners quickly.
Is a metal roof a good long-term investment?
Yes, a metal roof is generally a good long-term investment. Metal roofs are known for their durability and can last 40 to 70 years or more with proper care. Also, the excellent fire resistance of metal roofs makes it more durable than other materials.
How long do standing seam metal roofs last?
Standing seam metal roofs usually last around 40 to 70 years, and with good care, they can last even longer. Their design has raised seams that lock together, which helps keep water out and protects the roof from bad weather.
Do metal roofs rust over time?
Metal roofs can rust over time, but it really depends on the kind of metal and how you take care of it. A lot of metal roofs are made from materials like aluminum, stainless steel, or steel with a special coating that doesn’t rust easily.
