Working at height presents significant risks, with falls remaining one of the leading causes of serious workplace injuries in the UK. For employers, facilities managers and building owners, choosing the right fall protection system is essential for protecting personnel and ensuring compliance with regulations.
Two of the most commonly used solutions are Fall Arrest Systems and Fall Restraint Systems. While they are often mentioned together, they serve very different purposes — and understanding those differences is key to selecting the right approach.
In this guide, we break down the key differences between fall arrest and fall restraint systems, explain when each should be used, and help you determine the most appropriate solution for your building.
What Is a Fall Arrest System?
A Fall Arrest System is designed to stop a fall after it has occurred, reducing the risk of serious injury.
These systems allow operatives to work in areas where a fall is possible, while providing protection in the event of an incident.
Typical components include:
A full body harness
A lanyard or connecting device
A secure anchor point or lifeline system
Energy-absorbing elements to reduce impact forces
Fall arrest systems are commonly used in environments where it is not possible to fully eliminate fall risks, such as complex roof layouts or exposed working areas.
What Is a Fall Restraint System?
A Fall Restraint System is designed to prevent a fall from happening in the first place by restricting movement.
Rather than allowing access to hazardous areas, restraint systems ensure operatives cannot physically reach a point where a fall could occur.
Typical components include:
A full body harness
A fixed-length lanyard or restraint line
A secure anchor point or lifeline system
Because these systems eliminate the possibility of a fall, they are widely considered the safer option where conditions allow.
Which System Is Safer?
In most cases, fall restraint systems are considered safer because they prevent a fall from happening altogether.
UK safety guidance follows a clear hierarchy:
- Avoid working at height where possible
- Prevent falls (fall restraint systems)
- Minimise consequences (fall arrest systems)
Because fall restraint removes the risk at the source, it is often the preferred method of protection where it can be implemented effectively.
However, fall arrest systems are still essential in situations where restraint is not practical.
When Should You Use Fall Restraint Systems?
Fall restraint systems are best suited to environments where movement can be safely controlled.
Common applications include:
Roof maintenance and inspection
Access to rooftop plant and equipment
Flat roof areas with predictable access routes
Environments where operatives do not need to reach edges
In these scenarios, restricting access to hazards provides a simple and highly effective safety solution.
When Are Fall Arrest Systems Required?
Fall arrest systems are used when it is not possible to prevent access to fall risks.
They are typically required in:
Complex or irregular roof layouts
Work requiring access close to edges
Façade maintenance and external building work
Temporary or changing work environments
In these situations, fall arrest systems provide essential protection by reducing the impact of a fall.
Fall Arrest vs Fall Restraint and UK Regulations
Both fall arrest and fall restraint systems support compliance with the Work at Height Regulations 2005, which require employers to manage risks associated with working at height.
The regulations follow a clear hierarchy of control:
Avoid work at height where possible
Prevent falls using collective or restraint systems
Use fall arrest systems where prevention is not possible
Employers and duty holders must:
Carry out risk assessments
Select appropriate safety systems
Ensure correct installation and use
Maintain systems through regular inspection
Choosing the right system is not just a safety decision — it is also a legal requirement.
Common Mistakes When Choosing Between Systems
Selecting the wrong system can increase risk rather than reduce it. Some of the most common mistakes include:
Using fall arrest systems when restraint would be safer
Failing to carry out a proper risk assessment
Incorrect system design or specification
Lack of user training
Poor inspection and maintenance practices
Avoiding these mistakes is essential for ensuring both safety and compliance.
How to Choose the Right System for Your Building
Choosing between fall arrest and fall restraint systems depends on several key factors:
Building layout and structure
Nature of the work being carried out
Frequency of access
Level of risk and exposure to hazards
In many cases, a combination of systems may be required to provide the most effective protection.
A professional site assessment is the best way to ensure the correct solution is selected.
How Heightsafe Systems Can Help
At Heightsafe Systems, we have been helping organisations across the UK manage Work at Height risks since 2009.
Our services include:
Site surveys and risk assessments
Bespoke system design
Professional installation
Ongoing inspection and maintenance
Compliance support and guidance
Our experienced team will assess your requirements and recommend the most appropriate solution to ensure safety, compliance and long-term performance.
Frequently Asked Questions
What is the difference between fall arrest and fall restraint?
Fall restraint prevents a fall from occurring, while fall arrest stops a fall after it has happened.
Is fall restraint safer than fall arrest?
Yes. Fall restraint is generally considered safer because it eliminates the risk of a fall.
When is a fall arrest system required?
Fall arrest systems are used when it is not possible to prevent access to fall hazards.
Do both systems require inspection?
Yes. Regular inspection is essential to ensure safety and compliance.
Do workers need training to use these systems?
Yes. Proper training is required to ensure safe and effective use.
Final Thoughts
Understanding the difference between Fall Arrest and Fall Restraint Systems is essential for creating a safe and compliant working environment.
In most cases, fall restraint systems are the preferred option, as they prevent falls before they occur. However, where restraint is not possible, fall arrest systems provide a critical layer of protection.
Choosing the right solution depends on your building, your risks and your operational requirements — and getting it right is key to protecting both people and organisations.
Need Expert Advice?
If you’re unsure which system is right for your site, Heightsafe Systems can help. Our experienced team will assess your building and recommend a tailored solution designed around safety, compliance and long-term performance.
Contact Heightsafe Systems today to speak to a Work at Height specialist.