Metal roofing has long been a staple in industrial construction, dating back to the early 20th century. As the industrial revolution accelerated the need for larger, more durable buildings, metal became the material of choice due to its strength, fire resistance, and ability to cover expansive roof areas without the need for excessive support. Over time, materials such as steel and aluminium evolved, offering enhanced resistance to weathering and corrosion.
Why Metal Roofing is the Smart Choice for Industrial Buildings
When it comes to industrial buildings, choosing the right roofing system is crucial. Unlike traditional materials like slate or tiles, metal roofing offers a range of practical benefits that make it an ideal choice. It’s cost-effective, quick to install, and built to last – making it a smart investment for any industrial or commercial space.
Cost-Effective Solution for Long-Term Savings
Metal roofing offers a cost-effective alternative to traditional materials, providing excellent value for large-scale industrial buildings. With fewer repairs and a longer lifespan, metal roofs save money on maintenance and replacement costs over time.
Quick Installation Minimises Downtime
The efficiency of metal roofing systems allows for faster installation compared to traditional roofing materials, reducing disruption to business operations and ensuring that industrial facilities remain operational with minimal interruption.
Built to Last: Durability and Strength
Metal roofing is designed to withstand harsh weather conditions, offering superior protection against rain, wind, snow, and extreme temperatures. Its durability ensures that it remains intact and functional for decades, even in challenging environments.
Low Maintenance Requirements
Metal roofs require minimal upkeep, thanks to modern coatings that resist rust and corrosion. This makes them a low-maintenance option, helping to reduce long-term repair costs and providing peace of mind for building owners.
Energy Efficiency for Reduced Operating Costs
Metal roofing systems with reflective coatings help regulate building temperatures by reflecting heat away in summer and retaining warmth during winter. This energy-efficient design reduces the need for air conditioning and heating, leading to lower energy bills.
Comparing Different Metal Roofing Systems
Various types of metal roofing materials offer distinct advantages, making them suitable for different applications. In industrial and commercial settings, steel and aluminium are the most widely used due to their strength, cost-effectiveness, and durability. However, other metals such as zinc, copper, and lead are also used in roofing, primarily for heritage, architectural, and specialist projects rather than large-scale industrial applications.
Steel Roofing Systems
Steel is one of the most widely used roofing materials due to its strength, cost-effectiveness, and adaptability. It is particularly suited for large-scale industrial and commercial buildings, providing long-lasting protection with the right coatings and treatments. There are multiple variations of steel roofing, including stainless steel, galvanised steel, and corrugated steel, each offering unique benefits.
Pros:
- Affordable & Cost-Effective: Steel is generally more budget-friendly than other metals, making it an attractive option for large-scale industrial and commercial projects.
- High Strength & Durability: Steel roofing can withstand extreme weather conditions, including heavy snowfall, high winds, and hail.
- Versatile Design Options: Available in various profiles, coatings, and finishes, including tile-effect metal roofing, which provides the look of traditional tiles with the durability of steel.
- Protective Coatings Available: Coatings such as zinc, aluminium, or special polymer finishes enhance corrosion resistance and longevity.
Cons:
- Prone to Corrosion: Without proper coatings, steel can rust over time, particularly in humid or coastal environments. Regular maintenance is required to prolong its lifespan.
- Heavy Material: Compared to aluminium, steel is significantly heavier, sometimes requiring additional structural support.
- Requires Periodic Maintenance: Protective coatings can wear down over time, necessitating refinishing or replacement to prevent degradation.
Aluminium Roofing Systems
Aluminium is highly valued for its lightweight nature, corrosion resistance, and long lifespan. As the third most abundant element on Earth, aluminium is widely available and 100% recyclable, making it an eco-friendly choice. It is often used in coastal areas where saltwater exposure is a concern.
Pros:
- Exceptional Corrosion Resistance: Naturally resistant to rust, making it ideal for buildings in high-moisture or marine environments.
- Lightweight & Easy to Install: Weighing significantly less than steel, aluminium places less strain on structural frameworks, reducing construction costs.
- Longevity: Aluminium roofing systems can last over 50 years with minimal maintenance.
- Sustainable & Recyclable: 100% recyclable at the end of its lifespan, making it an environmentally friendly roofing choice.
Cons:
- Higher Cost: Aluminium is more expensive than steel, requiring a higher initial investment.
- Softer & More Prone to Dents: Compared to steel, aluminium is more susceptible to damage from hail, falling debris, or foot traffic during maintenance.
- Lower Load-Bearing Capacity: Not as strong as steel, which can limit its application in heavy-duty roofing projects.
Specialist & Architectural Metal Roofing
While steel and aluminium dominate industrial and commercial roofing, other metals, such as zinc, copper, and lead, are used for specific applications, particularly in architectural and heritage projects. These materials are generally referred to as “hard metals” and are used in fully supported roofing systems rather than the large-span, self-supporting profiles typical of industrial roofs.
Zinc Roofing
Known for its self-healing patina and long lifespan, zinc is often chosen for modern architectural buildings and high-end commercial properties rather than large-scale industrial sites.
Copper Roofing
A premium material with an evolving patina that provides natural corrosion resistance, copper is primarily used in historic and luxury projects, such as churches, heritage sites, and high-spec commercial developments.
Lead Roofing
Due to its exceptional durability and malleability, lead is commonly used in heritage and conservation projects, particularly for detailing, flashings, and restoration work on listed buildings.
These materials, while highly durable and visually appealing, are significantly more expensive than steel and aluminium, making them less common in industrial roofing applications.
Common Issues with Industrial Roofing Systems
Despite their durability, industrial metal roofs are not without challenges. The most common issues include:
Corrosion is a common problem, particularly in steel roofing, when protective coatings degrade over time, exposing the metal to moisture and oxygen.
Cut edge corrosion occurs on the exposed edges of steel sheets where factory-applied coatings have been cut away, requiring specific treatments to prevent deterioration.
Fastener and seal failures can occur due to weather exposure, leading to leaks and water damage if not promptly addressed.
Thermal movement caused by temperature fluctuations can lead to expansion and contraction of metal roofing, placing stress on fasteners and seams over time.
Lifespan and Maintenance Considerations
The longevity of a metal roofing system depends on several factors, including the material, protective coatings, and maintenance practices. Different metals offer varying lifespans, with some requiring minimal upkeep and others benefiting from regular treatment to maintain their performance.
- Steel Roofing lasts 25–40 years, depending on coatings like galvanisation or stainless steel protection. Regular maintenance is required to prevent corrosion, as guarantees often cover only the coating, not the metal.
- Aluminium Roofing can exceed 50 years, thanks to its natural corrosion resistance. While low-maintenance, extreme weather and structural movement can impact its longevity.
- Zinc Roofing lasts 60–100 years, forming a self-healing patina that protects against corrosion with minimal upkeep.
- Copper Roofing can last 100+ years, developing a durable green patina that enhances its resilience and reduces maintenance needs.
- Lead Roofing exceeds 150 years, making it one of the longest-lasting options, particularly for heritage buildings. However, skilled installation is essential.
Maintenance Strategies to Extend Roof Life
Regular maintenance is key to maximising the lifespan of industrial metal roofs. Best practices include:
- Cut edge corrosion treatment is essential for steel roofing, particularly at the exposed edges of coated sheets. While it won’t extend the life of the entire roof by 20 years, it helps prevent peeling and limits capillary attraction at the end laps, reducing the risk of premature deterioration.
- Protective coatings and repainting should be managed based on the colour and exposure of the roof. Dark colours, such as Vandyke Brown, typically require repainting after 20 years, while lighter colours can last around 30 years before recoating. The performance also depends on the type of steel and coating used—British Steel generally outperforms French, Italian, Swedish, and Korean alternatives, and coatings such as Plastisol or HPS200 significantly impact durability.
- Scheduled inspections should be carried out regularly to identify any potential issues early. While metal roofs are highly reliable, failures often occur at penetrations—such as rooflights, vents, and fixings—rather than the roof sheets themselves. Ensuring these areas are properly sealed and maintained is crucial to preventing leaks.
- Cleaning and debris removal should focus on keeping gutters clear, as standing water is not typically an issue on metal roof sheets themselves. Blocked gutters can lead to water backing up and causing damage over time.
By following these best practices, industrial metal roofs can maintain their durability and performance for decades.
Renewal Options for Industrial Metal Roofing
When a metal roof reaches the end of its functional lifespan, there are two primary renewal options:
Oversheeting
Oversheeting involves installing a new metal roof over the existing one, providing several benefits:
- This method minimises operational disruption by eliminating the need for a full roof replacement, allowing businesses to continue operations uninterrupted.
- Oversheeting enhances insulation and thermal performance, helping to improve energy efficiency and maintain a stable indoor temperature.
- This approach reduces waste by preserving the existing roof structure, making it an environmentally friendly option.
- However, the additional weight of the new roofing layer must be carefully assessed, and structural reinforcement may be required to support the added load.
Strip and Re-cover
In cases where the existing roof is severely damaged, a complete strip and recover may be the best option:
- This method ensures a fresh start by removing the old, deteriorated roofing system and replacing it with a new one, eliminating any underlying issues.
- A strip and re-cover allows for the replacement of damaged or deteriorated structural elements, ensuring long-term durability and reliability.
- This approach eliminates persistent issues such as leaks, rust, or extensive corrosion, providing a more robust and secure roofing solution.
Making the Right Investment in Industrial Roofing
Selecting and maintaining the appropriate metal roofing system for an industrial building requires balancing cost, longevity, and environmental conditions. Working with an expert commercial metal roofing contractor is essential, if you’re to receive the correct guidance on the most suitable metal roofing solution for your project.
Contact the team at Maguire Brothers, and we’ll be happy to discuss your requirements and explore tailored recommendations.
