How Long Does a Metal Roof Last

Metal roofs are a popular choice for residential, commercial, and agricultural buildings due to their strength, style, low maintenance, and exceptional longevity. They last significantly longer than other roofing materials. A common question is about the lifespan of metal roofs.

We provide all the details on the lifespan of a metal roofing system to help you make an informed decision before choosing your next roofing contractor.

Different Types of Common Metal Roofing Lifespan

1. Steel Roofing (Lifespan: Average of 40 years)

Steel roofs are versatile and durable, often lasting longer than asphalt shingles. They can mimic the appearance of slate, shingles, or clay, making them a smart long-term investment. Coatings protect steel roofs from corrosion, ensuring their longevity and aesthetic appeal.

2. Aluminum Roofing (Lifespan: Average of 50 years)

Aluminum roofing is the lightest metal option and ideal for coastal areas due to its corrosion resistance, unlike steel. It requires elastomeric coatings for waterproofing. This roofing is energy-efficient, reflecting heat and light to keep homes cool and reduce utility bills. Its light weight also allows for quick installation.

3. Copper Roofing (Lifespan: 50-100 years)

Copper roofing is highly regarded for its durability and attractiveness. It doesn't require paint treatments to prevent decay and is lightweight, making it suitable for smaller dwellings. A copper roof typically lasts 50 to 100 years. The patina that forms over time indicates corrosion but also acts as a protective, waterproof layer.

4. Tin Roofing (Lifespan: Average of 50 years)

Tin roofing is not commonly used today, having been more prevalent before aluminum became the metal roofing standard. To reduce rain noise, add roof underlayment materials.

5. Zinc Roofing

Zinc roofing offers a comparable lifespan to copper but requires a clean atmosphere for longevity. It resists corrosion and can be installed over existing roofs. Zinc is 90–95% recyclable, making it a sustainable choice. Its self-healing ability prevents leaks and reduces the need for professional repairs.

Metal Roof vs Other Types of Roof Lifespan Comparison

Metal Roof vs Shingles

Metal roofing has a higher initial cost but offers long-lasting durability, often exceeding 60 years with minimal maintenance. Many vendors provide a 50-year warranty due to its resistance to environmental factors, insects, mold, and mildew.

Shingle roofs, depending on type, typically require replacement twice in 60 years. They are more vulnerable to hail and wind damage, making them less ideal for areas with harsh weather.

Metal Roof vs Tile Roof

Concrete tiles usually last 50 years, while clay tiles can last over 100 years. Tile roofs require minimal maintenance, but they are brittle and need careful handling. Their longevity can significantly increase a home's market value.

Elements Influencing the Lifespan of Metal Roofs

1. Roof Color

You might be surprised to discover that the color of your roof affects its lifespan. Darker roofs tend to absorb more heat, while lighter-colored roofs reflect heat, reducing indoor temperatures. To keep a dark metal roof cooler, consider using acrylic elastomeric roof coatings.

2. Roof Slope

The slope of a roof refers to its steepness. The longevity of a roof is influenced by its slope, as a steep slope drains water quickly, whereas a low slope allows water to linger. Standing water accelerates deterioration by absorbing and eroding the roof's material.

3. Moss Growth

Moss accelerates roof deterioration. Although not common on metal roofs, organic material on the roof surface can promote moss growth.

For instance, the northern side of the roof often has shaded areas that are perfect for moss growth. A roof surrounded by trees is also more susceptible to moss. While moss isn't typically an issue with metal roofs, physical debris can make them more prone to it.

4. UV Radiation

UV radiation significantly affects the lifespan of a metal roof, deteriorating the material over time, especially in sun-exposed areas.

5. Installation

Proper installation is crucial for a metal roof's longevity. Ensure the contractor follows the manufacturer's instructions, is licensed, and provides warranties on labor and materials.

6. Maintenance

Metal roofs require less maintenance but still need regular inspections by certified roofers to address issues promptly.

How Can You Make Your Metal Roof Last Longer?

Trim trees that are touching your roof.

Tree branches or shrubs that come into contact with your metal roof due to wind can cause dents, cuts, or other damage. Regularly prune your trees and bushes.

Remove debris from your roof.

Rain and snowstorms can wash debris off your buildings. Rainfall can assist in clearing leaves, branches, and other debris from your roof. Use soft-bristled window cleaning tools to remove dirt without harming your roof. Avoid spraying water under the roof's edge to prevent water damage.

Avoid walking on your roof.

Refrain from stepping on your metal roof. Although it can handle some foot traffic, frequent walking can cause damage. If you must climb a metal roof, consult the supplier’s guidelines for safe practices.

Keep your gutters clear of debris.

Neglected gutter debris can harm even metal roofs. If debris clogs your gutters, stagnant water may corrode or rust your roof, reducing its lifespan.

Avoid painting your roof.

Spray paint is particularly harmful to a metal roof. Ensure any painters you hire stay away from your metal roof. Paint can damage the finish and reduce the lifespan of a metal roof.

Elements Influencing the Longevity of Metal Roofs

Various factors affect the lifespan of a metal roof:

Installation Quality

It is crucial that certified, experienced contractors perform the installation correctly. Errors made during installation can cause early failures. Refer to our guide on selecting a roofing contractor.

Weather and Climate

Metal roofs perform exceptionally well in various climates, particularly in severe or coastal areas. Aluminum and zinc are particularly effective at resisting salt air. In coastal regions such as Florida, metal roofs provide outstanding corrosion resistance and durability against hurricanes.

Paint and Protective Finishes

Premium coatings such as Kynar 500 offer protection against fading, UV damage, and corrosion. Discover more about roof coatings.

Roof Design and Slope

Roofs with steep slopes allow water to run off rapidly, minimizing the chance of water accumulation and moss formation, which can shorten the roof's lifespan.

Maintenance

While metal roofs require minimal upkeep, it's advisable to conduct an annual inspection—remove debris, clean the gutters, trim nearby branches, and ensure fasteners are secure. Discover more about metal roof maintenance.

Ventilation

Ensuring adequate attic ventilation is essential to avoid moisture accumulation beneath the roof, which can lead to rust and structural damage. For the best results, refer to our guidance on roofing materials supplier.

Is Investing in a Metal Roof Beneficial?

Yes. Despite the higher initial cost compared to asphalt shingles, metal roofs offer long-term benefits such as:

• Fewer replacements over your home’s lifespan

• Reduced maintenance

• Improved energy efficiency

• Potential insurance discounts

For long-term homeowners seeking a durable, low-maintenance roofing system, metal roofing is a cost-effective choice.

What Are the Benefits of Metal Roofs Beyond Longevity?

• Energy Efficiency: Metal surfaces reflect solar radiant heat, leading to cooling cost reductions of up to 25%.

• Environmental Impact: Fully recyclable at the end of its life, unlike asphalt shingles which contribute to landfill waste.

• Extreme Weather Durability: Metal withstands wind speeds up to 140 mph, effectively sheds snow, and is resistant to fire.

• Solar Compatibility: Standing seam roofs support non-penetrating solar panel mounts, maintaining roof integrity.

• Lightning Safety: Metal roofs do not attract lightning. If they are struck, the electricity is safely conducted across the roof's surface and into the ground.

Takeaway

Metal roofing is an excellent choice for those who wish to install a roof and not have to think about it for many years. While metal roofing offers numerous benefits, its durability is certainly one of the most important. Nonetheless, it's wise to hire a reputable roofing company for installation and upkeep. This can provide you with valuable insights on maintaining your roof to ensure it lasts longer.