An old asbestos roof that had come to the end of its life and was causing our client serious issues. We installed a new frame work and installed a roof over system that renewed the roof area and gave our client peace of mind.

What Is a Roof-Over System?

A roof-over system involves installing a new metal roofing layer directly over the existing structure—often without full removal. This approach is:

Cost-effective, avoiding full teardown

Faster to install, reducing downtime

Minimally disruptive, ideal for operational buildings

Adds insulation, improving energy efficiency

It’s particularly useful when replacing older asbestos roofs, as it can contain the hazardous material below a sealed barrier until safe removal is viable.

Why Asbestos Roofing is Not a Good Idea

Asbestos was once a popular material in roofing products due to its durability, fire resistance and insulating properties. However, it is now widely recognised as hazardous to health and the environment. Here’s why asbestos roofing is no longer considered a suitable or safe option:

The most critical reason asbestos roofing is avoided today is due to the severe health dangers it poses. When asbestos-containing materials are disturbed or deteriorate over time, they release tiny fibres into the air. Inhalation of these fibres can lead to serious, often fatal health conditions, including:

• Asbestosis (a chronic lung condition)
• Lung cancer
• Mesothelioma (a rare and aggressive cancer of the lung lining)
• Pleural thickening (a disease affecting the lining of the lungs)

Even minimal exposure over time can be dangerous, and symptoms may not appear until decades after exposure.

Thermal Bridging: What You Need to Know

When upgrading to metal sheeting, it’s essential to consider thermal bridging—where heat bypasses insulation via metal components.

Mitigation strategies include:

Using insulated spacer bars between panels

Installing continuous insulation layers

Opting for composite panels with built-in insulation

Addressing thermal bridging ensures the full energy-efficiency potential of your new metal roof is realised.

Aging and Deterioration

Asbestos cement roofing sheets degrade as they age. Although originally marketed as long-lasting, weather exposure causes them to become brittle and prone to cracking. As the material breaks down, it poses an even greater risk of fibre release.

Old or damaged asbestos roofs are especially hazardous during storms, high winds, or maintenance work. Any disturbance can release fibres into the surrounding air, putting workers and building occupants at risk.

Asbestos is not biodegradable and poses a long-term environmental threat. Fibres can contaminate soil and water sources, affecting surrounding ecosystems. Disposing of asbestos-containing materials also requires strict compliance with hazardous waste regulations, often making removal costly and complex.

When Is Asbestos Roofing Most Dangerous?

Asbestos-containing cement sheets become more hazardous as they age. Deterioration caused by weather, UV exposure, or mechanical stress can lead to surface cracking—raising the risk of fibre release.

Legal and Regulatory Issues

In the UK and many other countries, asbestos use is now heavily regulated or completely banned. Under the Control of Asbestos Regulations 2012 (UK), building owners have a legal duty to manage asbestos if it is present. This includes:

• Surveying the property for asbestos
• Maintaining a management plan
• Informing workers of potential asbestos exposure risks

Failure to comply could result in legal action, fines or closure of the premises.

How to Dispose of Asbestos Safely

Disposing of asbestos roofing is complex and regulated:

Only licensed waste carriers can transport asbestos

It must be double-bagged and clearly labelled

Waste must be taken to approved hazardous disposal sites

Workers must wear appropriate PPE, including respirators

DIY removal is strongly discouraged. Improper disposal can result in prosecution and severe health risks.

When it comes to replacing an ageing or damaged industrial roof, selecting the right material is crucial—not only for protecting the structure but also for ensuring long-term value and efficiency. One of the most popular and reliable options available today is metal sheeting. Favoured across a wide range of sectors—from manufacturing plants and warehouses to agricultural buildings and commercial units (metal roofing provides a combination of durability, performance, and practicality that few other materials can match).

Planning Permission for Roof Replacements

In the UK, most industrial roof replacements—especially like-for-like upgrades—do not require planning permission. However:

Asbestos removal must be reported under hazardous waste guidelines

If changing the roof height or appearance, planning permission may apply

Work must comply with Building Regulations, especially regarding insulation and fire safety

Always consult a qualified contractor or local authority before beginning work.

Industrial roofs are subjected to intense wear and tear over time, often exposed to harsh weather conditions, mechanical vibrations, and the added weight of HVAC systems or solar installations. Metal sheeting is uniquely equipped to withstand these challenges while offering a clean, modern aesthetic and minimal ongoing maintenance.

Replacing an outdated roof, especially one made of asbestos or brittle materials, with high-quality metal sheets is not only a safety-conscious decision but also a strategic investment in the building’s future. From cost savings on energy to extended lifespan and environmental benefits, metal sheeting continues to prove its worth in industrial roofing across the UK.

Benefits of Switching to Metal Sheeting

Modern metal roofing offers a range of practical and long-term advantages over older roofing systems, particularly asbestos cement.

Key benefits:

• Lifespan: 40-70 years with proper care
• Safety: Non-combustible, corrosion-resistant, structurally sound
• Energy savings: Reflective coatings reduce summer cooling costs
• Sustainability: Fully recyclable at end of life
• Speed of install: Lightweight panels reduce labour time

It’s a future-proof option for businesses seeking performance and peace of mind.

Below are some of the key advantages that make metal sheeting a standout choice for your next roof replacement project.

Metal Sheeting Replacement Roofing Solutions

Exceptional Durability
Metal sheeting is highly resistant to extreme weather conditions, including heavy rain, strong winds, snow, and even hail. Unlike traditional materials, metal won’t crack, warp, or become brittle over time. With proper installation and maintenance, a metal roof can easily last 40 to 70 years.

Low Maintenance
Once installed, metal roofs require very little upkeep compared to other materials. They are resistant to rot, insect damage, and mildew. Modern coatings also help prevent corrosion and fading, preserving both functionality and appearance.

Energy Efficiency
Metal roofs can be coated with reflective finishes that deflect solar heat, significantly reducing cooling costs during warmer months. This makes them a sustainable choice for businesses aiming to improve energy efficiency and reduce their environmental footprint.

Lightweight and Easy to Install
Metal sheeting is lighter than concrete or clay tiles, putting less strain on the building’s structure. Its large panels and straightforward installation process also reduce labour time, minimising disruption to operations during replacement.

Fire and Safety Resistance
Metal is non-combustible, offering added protection in case of fire. It also meets strict safety standards, making it an ideal choice for industrial environments where safety is a priority.

Recyclable and Sustainable
At the end of its life, metal sheeting can be fully recycled, supporting circular construction practices. This eco-friendly aspect appeals to businesses committed to sustainability.

Overall, metal sheeting delivers performance, safety and value (making it an outstanding long-term investment for any industrial roofing replacement project).

Retrofitting Solar Panels on Metal Roofs

Metal roofs are ideal for solar PV installations, thanks to their durability and structural integrity.

Benefits include:

Longer roof lifespan aligns with solar payback timelines

Easier installation with clamp-on mounting systems

Reduced need for roof penetrations = fewer leak risks

Potential to improve your building’s EPC rating

If you’re re-roofing, consider solar integration as a long-term cost-saving measure.