Why Are Bunded Oil Tanks More Expensive? (And Are They Worth It?)

If you’re replacing or installing a new oil tank, you’ve probably noticed that bunded oil tanks cost significantly more than single-skin tanks. This often leads homeowners and businesses to ask the same question: why are bunded oil tanks so expensive—and are they really worth the extra cost?

The short answer is yes. Bunded oil tanks offer superior safety, environmental protection, and long-term value, which is why they’re increasingly recommended across the UK.

In this guide, we’ll explain what makes bunded oil tanks more expensive, break down the costs, and help you decide whether they’re the right choice for your property.

What Is a Bunded Oil Tank?

A bunded oil tank (also known as a double-skin oil tank) features two layers:

• An inner tank that stores the oil

• An outer protective tank that acts as a secondary containment system

If the inner tank leaks, the outer bund prevents oil from escaping into the environment. This design dramatically reduces the risk of pollution, property damage, and costly clean-ups.

You can explore a full range of bunded tanks here:
https://www.oiltanksplus.co.uk/oil-tank-range/bunded-oil-tanks/

Why Are Bunded Oil Tanks More Expensive?

1) Double-Walled Construction and Materials

The biggest reason for the higher price is the double-skin design.

Bunded tanks require:

• More raw materials

• Stronger structural engineering

• Higher manufacturing standards

This results in improved durability and a longer lifespan compared to single-skin tanks.

2) Advanced Safety Features

Bunded oil tanks are designed with safety as a priority. Many models include:

• Spill containment systems

• Overfill prevention features

• Stronger impact resistance

• Improved stability and weather resistance

These features reduce the risk of leaks, fires, and accidents—making bunded tanks a safer option for homes and commercial properties.

3) Environmental Protection and UK Regulations

Environmental regulations in the UK are becoming increasingly strict regarding oil storage.

Bunded tanks help to:

• Prevent soil and groundwater contamination

• Reduce environmental liability

• Meet regulatory requirements in sensitive locations

In many cases, bunded tanks are recommended or required near watercourses, drains, or protected areas.

For an overview of oil tank costs and considerations, you can read:
https://www.theheatinghub.co.uk/how-much-does-new-oil-tank-cost

4) Higher Manufacturing Standards

Leading manufacturers invest heavily in quality control and engineering to ensure bunded tanks meet industry standards.

For example, some manufacturers specialise in high-performance bunded tanks designed for maximum durability and compliance:
https://www.tuffa.co.uk/239-2/

Higher manufacturing standards naturally increase production costs—but they also improve reliability and safety.

Are Bunded Oil Tanks Worth the Cost?

Although bunded oil tanks have a higher upfront price, they often provide better value over time.

Long-Term Benefits

• Reduced risk of leaks and spills

• Lower chance of environmental damage

• Potential insurance benefits

• Fewer costly repairs or replacements

• Increased property protection

In many cases, the cost of cleaning up an oil spill can exceed the price difference between a single-skin and bunded tank—making bunded tanks a smart long-term investment.

Bunded vs Single-Skin Oil Tanks: Key Differences

Choosing the Right Bunded Oil Tank

When selecting a bunded oil tank, consider:

• Tank capacity (litres)

• Installation location

• Usage requirements

• Compliance with regulations

• Installation costs

Professional installation is essential to ensure safety, compliance, and performance. You can learn more about installation services on our website.

Conclusion

Bunded oil tanks are more expensive because they offer superior safety, durability, and environmental protection. While the initial investment is higher, the long-term benefits often outweigh the cost—making bunded tanks the preferred choice for many UK homeowners and businesses.

If you’re considering upgrading or installing a new oil tank, explore the full range of bunded oil tanks at Oil Tanks Plus and speak to our experts for tailored advice.