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How Long Does a Metal Roof Last?

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How Long Does a Metal Roof Lasts in Canberra?

Metal roofs are known for their durability and longevity. On average, a properly installed and maintained metal roof can last 40 to 70 years or even longer. The lifespan of a metal roof can be influenced by various factors, including the type of metal used, the quality of installation, local climate conditions, and how well it is maintained.

Why Choose a Metal Roof?


Metal roofs are known for their durability and longevity. They can withstand a variety of weather conditions, including rain, snow, hail, and high winds. The durability of metal roofing reduces the need for frequent repairs and replacements, providing long-term value.

Long Lifespan:

Metal roofs often have a longer lifespan compared to many other roofing materials. They can last 40 to 70 years or more with proper maintenance. Choosing a long-lasting roofing material and experienced roofing experts can save money in the long run and reduce the environmental impact of frequent replacements.

Weather Resistance:

Metal roofs are resistant to water, snow, and ice. They also provide effective protection against embers due to forest fires in Canberra and are less prone to rot or insect damage. Weather-resistant properties contribute to the overall durability and reliability of a metal roof.

Energy Efficiency:

Metal roofs can reflect sunlight, helping to keep your home cooler in hot climates. Some metal roofs have reflective coatings that enhance energy efficiency. Improved energy efficiency can lead to lower cooling costs, making metal roofing a sustainable and cost-effective choice.

Aesthetic Variety:

Metal roofs come in a variety of styles, colors, and finishes, allowing for customization to match your home’s aesthetics. The versatility in design enhances the curb appeal of your property, providing both durability and visual appeal.

Low Maintenance:

Metal roofs require minimal maintenance compared to some other roofing materials. Regular/periodic inspections by certified roofers and occasional cleaning are generally sufficient. Reduced maintenance efforts contribute to the convenience and overall cost-effectiveness of metal roofing.

Environmentally Friendly:

Metal roofing materials are often recyclable, and some may contain recycled content. Additionally, the long lifespan reduces the need for frequent replacements. Choosing a sustainable roofing option contributes to environmental conservation.

Resale Value:

The durability, longevity, and energy efficiency of metal roofs can enhance the resale value of a home. Homebuyers in Canberra often perceive metal roofing as a desirable feature, potentially increasing the market value of the property.

Considering these factors can help you make an informed decision when exploring roofing options. It’s also advisable to consult with roofing professionals and consider your specific climate conditions and budget constraints. 

Different Types of Metal Roofing and How Long They Last

Here are some general estimates for the lifespan of different types of roofs:

Aluminum Roofing:

Aluminum is lightweight, corrosion-resistant, and does not rust. It is commonly used in coastal areas due to its resistance to salt corrosion. Aluminum roof sheet is known for its longevity and low maintenance requirements. It can last 30 to 50 years or more. 

Steel Roofing:

Steel is a common and durable metal roofing material. It is often coated with protective layers to enhance its corrosion resistance. Steel roofing is known for its strength and affordability. It typically lasts 20 to 40 years.

Galvanized Steel Roofing:

Galvanized steel is coated with a layer of zinc, which provides corrosion resistance to the underlying steel. It is shiny with a spangled appearance. It provides effective corrosion protection, especially in moderate environments. It is commonly used for roofing, gutters, and other exterior applications. Galvanized steel roofing can last for several decades, typically around 20 to 30 years or more, depending on factors like climate and maintenance. It is widely used in residential and commercial roofing applications due to its affordability and corrosion resistance.

Galvalume Steel Roofing:

Galvalume steel has a coating composed of zinc, aluminum, and silicon, forming a corrosion-resistant alloy. It provides an exceptional matte finish and enhanced corrosion resistance, making it suitable for more challenging environments, including coastal areas. It is known for its durability and longevity and can last for 40 years or more with proper maintenance. It is commonly used in residential and commercial roofing where increased corrosion resistance is desired. It is particularly suitable for areas with harsh environmental conditions.

Tin Roofing:

While the term “tin roofing” is commonly used, modern tin roofing is often made of galvanized steel or other metals, not pure tin. Historically, tin-plated iron sheets were used, but not used anymore. Modern tin roofing is typically made of steel sheets coated with a thin layer of tin or other metals. This coating helps provide corrosion resistance. It often has a shiny or silvery appearance, especially when the metal is exposed. It provides good durability and resistance to the elements.

Corrugated Metal Roofing:

Corrugated metal roofing is made from thin sheets of metal, usually steel, aluminum, or galvanized iron. These sheets are corrugated or folded into a series of parallel ridges and grooves. The corrugated design adds strength and rigidity to the metal sheets. These corrugations create channels for water shedding, enhancing the roof’s ability to handle rain and snow. It is available in various metals, finishes, and colors, providing versatility in design. It is commonly used in agricultural, industrial, and residential roofing. It’s known for its durability, cost-effectiveness, and ease of installation.

Colorbond Roof:

Colorbond is a brand of coated steel roofing material that is popular in Australia. It is known for its durability, versatility, and wide range of color options. It is made from pre-painted steel with a zinc/aluminum alloy coating for corrosion resistance. The color is bonded to the steel, providing long-lasting vibrancy. Colorbond roofs are lightweight, strong, and can withstand harsh weather conditions. They are often used in residential, commercial, and industrial applications. It is known to have a lifespan of around 40 years or more.

Copper Roofing:

Copper is a premium and aesthetically pleasing metal roofing material. It is highly durable and resistant to corrosion. Over time, copper develops a natural patina that adds to its visual appeal. Copper roofing is often chosen for its distinctive look and long lifespan.

Zinc Roof:

Zinc is another metal used for roofing, known for its corrosion resistance and durability. Like copper, zinc develops a protective patina over time. Zinc roofing is valued for its unique appearance and environmental sustainability. It is known for its longevity and can last 50 years or more.

Asphalt Shingle Roof:

Asphalt shingles are made from a base mat of fiberglass or organic materials, coated with asphalt and mineral granules. They are not metal; instead, they are a type of composite roofing material. Asphalt shingle roofs are popular for residential applications due to their affordability, ease of installation, and variety of styles and colors. It typically lasts between 20 to 30 years, depending on factors like climate, shingle type, and proper maintenance.

It’s important to note that these estimates are general guidelines, and the actual lifespan can vary. Regular maintenance, such as inspecting and addressing any issues promptly, can contribute to extending the life of a metal roof.

Additionally, factors like the quality of the installation, proper ventilation, and protection against harsh weather conditions can influence the longevity of a metal roof. If you’re considering a metal roof for your property, consult with a professional roofing company such as Rebel Roofing ACT Canberra which chooses high-quality materials to ensure the longevity and performance of your roof. 

Factors That Can Decrease The Longevity Of A Metal Roof?

While metal roofs are known for their durability, several factors can contribute to a decrease in their longevity. Understanding and addressing these factors can help maximize the lifespan of a metal roof. Here are some key factors to consider:

Poor Installation:

Incorrect installation practices, such as improper fastening, inadequate sealing, or lack of proper ventilation, can compromise the performance of a metal roof. Poor installation may lead to leaks, premature corrosion, and other issues that can significantly reduce the lifespan of the roof.

Lack of Maintenance:

Neglecting regular inspections and maintenance can allow small issues to escalate, leading to more significant problems over time. Accumulated debris, damaged panels, or unaddressed issues may contribute to corrosion and reduce the overall longevity of the metal roof.

Accumulation of Debris:

Leaves, branches, dirt, and other debris can accumulate on the roof, leading to moisture retention and potential corrosion. Excessive debris can impede water drainage and contribute to the deterioration of the metal surface, affecting the roof’s longevity.

Harsh Environmental Conditions:

Exposure to extreme weather conditions, such as frequent hailstorms, intense UV radiation, or coastal salt spray, can accelerate the aging of metal roofing materials. Metal roofs in areas with harsh environmental conditions may experience faster corrosion or coating degradation, reducing their lifespan.

Incompatible Materials:

Using incompatible materials, such as different metals that can cause galvanic corrosion, can compromise the integrity of the roof. Galvanic corrosion occurs when dissimilar metals come into contact, leading to accelerated corrosion. Proper material selection is crucial to avoid this issue.

Unaddressed Rust or Corrosion:

If rust or corrosion is present, especially on exposed fasteners or damaged coatings, it needs prompt attention. Unaddressed rust or corrosion can spread and compromise the structural integrity of the metal roof, reducing its lifespan.

Foot Traffic and Damage:

Frequent foot traffic or accidental damage, such as falling branches, can dent or scratch the metal surface. Physical damage may compromise the protective coating and expose the metal to corrosion, affecting the overall longevity of the roof.

Neglecting Coating Maintenance:

Many metal roofs have protective coatings. Neglecting routine inspections and recoating as needed can expose the metal to corrosion. Coating breakdown can lead to accelerated corrosion and reduce the lifespan of the metal roof.

Regular inspections, timely repairs, proper maintenance, and attention to environmental factors are crucial for preserving the longevity of a metal roof. It’s advisable to consult with roofing professionals to address any issues promptly and ensure the proper care of the metal roofing system.

Effective Maintenance Tips to Prolong the Life of Your Roof

Here are some effective maintenance tips to help prolong the life of your roof, whether it’s a metal roof or another roofing material:

Regular Inspections:

Conduct visual inspections of your roof at least twice a year, preferably in the spring and fall. This helps identify potential issues early, allowing for timely repairs and preventing more significant damage.

Clean Gutters and Downspouts:

Keep gutters and downspouts free of debris, such as leaves and twigs. Proper drainage prevents water buildup on the roof, reducing the risk of leaks and water damage.

Remove Debris:

Clear debris, such as leaves, branches, and other materials, from the roof surface. Accumulated debris can trap moisture and contribute to the corrosion or deterioration of roofing materials.

Check for Moss and Algae:

If you notice moss formation or algae growth, especially in shaded areas, consider using zinc or copper strips to prevent further growth. Moss and algae can trap moisture and accelerate the deterioration of roofing materials.

Trim Overhanging Branches:

Trim tree branches that overhang the roof to prevent potential damage during storms. Overhanging branches can cause physical damage to the roof and contribute to debris buildup.

Inspect Flashing and Seals:

Check the flashing around chimneys, vents, and skylights. Ensure seals are intact. Damaged or loose flashing and seals can lead to water penetration. Replace or repair as needed.

Look for Signs of Leaks:

Check the attic for signs of leaks, water stains, or mold growth. Early detection of leaks helps prevent water damage to the interior structure and insulation.

Monitor for Rust and Corrosion (Metal Roofs):

Inspect metal roofs for signs of rust or corrosion, especially around fasteners and seams. Addressing rust or corrosion promptly helps maintain the integrity of the metal roofing system.

Address Ice Dams in Winter:

In cold climates, take measures to prevent ice dams, such as improving attic insulation and ventilation. Ice dams can lead to water backup and leaks, causing damage to the roof and interior.

Professional Roof Inspection:

Consider hiring a professional roofing contractor for a comprehensive inspection every few years. Professionals can identify potential issues that may not be visible during routine inspections and provide expert recommendations.

Remember, regular maintenance is key to prolonging the life of your roof. If you’re unsure or uncomfortable performing certain tasks, it’s always a good idea to consult with roofing professionals for guidance.

Concerns To A Metal Roof?

It’s important to be aware of potential concerns related to metal roofs. While metal roofs offer numerous benefits, understanding these concerns can help you make informed decisions and effectively manage your roof. Here are some common concerns associated with metal roofing:


Upfront costs for metal roofing materials and installation can be higher compared to some other roofing options. While the initial investment may be higher, the long-term durability and reduced maintenance costs can make metal roofing a cost-effective choice over the life of the roof.


Some people associate metal roofs with increased noise during rainfall or hailstorms. Proper insulation and the use of sheathing materials can minimize noise concerns. Many modern metal roofs are designed to be as quiet as other roofing materials.


Metal roofs can potentially dent if struck by large hail or heavy objects. Choosing thicker-gauge metal and impact-resistant coatings can help minimize denting. Proper installation also plays a role in impact resistance.

Expansion and Contraction:

Metal expands and contracts with temperature changes, which can lead to noise, fastener movement, and potential stress on seams. Properly installed metal roofs account for thermal movement. Using clips or other fastening systems that allow for expansion and contraction can mitigate these concerns.

Mismatched Repairs:

If repairs are needed, mismatched materials or coatings may affect the aesthetics of the roof. When repairing a metal roof, it’s advisable to use matching materials and coatings to maintain a uniform appearance.

Galvanic Corrosion:

Galvanic corrosion can occur if dissimilar metals come into contact, leading to accelerated corrosion. Ensure that materials such as fasteners and flashing are compatible with the metal roofing material to prevent galvanic corrosion.

Scratching and Scuffing:

Metal roofing surfaces can be susceptible to scratching during installation or maintenance activities. Handle metal roofing materials with care, and take precautions during installation to avoid unnecessary scratching. Protective coatings can also help prevent surface damage.

Color Fading:

Over time, exposure to UV radiation can cause color fading in some metal roofing materials. Choose high-quality coatings that are UV-resistant to minimize color fading. Regular maintenance and cleaning can also help preserve the appearance of the roof.

Improper Installation:

Incorrect installation practices can lead to issues such as leaks, poor performance, and reduced longevity. Hiring a qualified and experienced roofing professional is crucial for ensuring proper installation. Follow manufacturer guidelines and building codes.

Snow and Ice Accumulation:

In areas with heavy snowfall, snow and ice accumulation on a metal roof can pose safety hazards and potentially lead to damage. Installing snow guards or using other preventive measures can help manage snow and ice buildup on the roof.

By being aware of these concerns and considering the suggested precautions, you can better navigate potential challenges and enjoy the many benefits that metal roofing has to offer. If you have specific questions or concerns about your metal roof, consulting with roofing professionals is always advisable.

Frequently Asked Questions (FAQs)

Q 1: What is the average life expectancy of a roof in Australia?

The life expectancy of a roof in Australia can vary depending on material, climate, and maintenance factors. Generally, a well-maintained roof can last between 20 to 70 years.

Q 2: What considerations are important when thinking about roofing in Canberra?

Roofing in Canberra should address the region’s weather conditions, including temperature extremes and occasional snowfall. Choosing durable materials and proper insulation is crucial for optimal performance.

Q 3: What is an insulation blanket for roofs?

An insulation blanket is a layer of material installed in the roof space to regulate temperature, providing thermal efficiency and energy savings for the home.

Q 4: What advice should be kept in mind regarding metal roof warranties?

When considering metal roof warranties, it’s crucial to understand coverage details, maintenance requirements, and the importance of professional installation to ensure the warranty remains valid.

Are you looking for unparalleled durability and style in Canberra?

Choose Rebel Roofing ACT, your go-to choice for all types of top-notch metal roofing solutions. Upgrade your home with our high-quality roofing options that stand up to the capital’s diverse climate. Secure your investment – choose Rebel Roofing ACT for roofing excellence. 

Contact us today for a quote and embrace the durability and sophistication Canberra deserves!