We know that exposure to radon gas, which is found in homes all over the country, accounts for the second greatest number of lung cancer cases in the UK. Fortunately, there are several techniques available that can successfully reduce radon concentration within a building and prevent future intrusion.
These mitigation systems are installed to reduce health risks and create a safer indoor environment. Although, once fitted, it is easy to assume that they will continue working indefinitely without attention.
In reality, the effectiveness of radon mitigation systems depends on basic maintenance and periodic testing to ensure they continue to perform as intended.
Why Maintenance Matters
Changes in airflow, fan performance or structural conditions can affect how well mitigation systems control radon levels. Without maintenance, a shift in performance may go unnoticed.
Maintaining the system ensures it continues to actively reduce radon concentration. The difference between a functional and non-functional system may not be visible, but it is significant.
Real-World Consequences
A widely reported case involving Kingswood School in Bath demonstrates the importance of monitoring and maintenance of mitigation systems.
BBC News reported that the school had previously identified elevated radon levels and installed mitigation measures. However, follow-up monitoring was not consistently maintained thereafter.
It was revealed that five pupils, two employees and their children had been exposed to high levels of radon gas. Kingswood School Trustees Limited pleaded guilty to breaching Section 2(1) and 3(1) of the Health and Safety at Work etc Act 1974 and were fined £50,000.
Issues that Reduce Effectiveness
Over time components of mitigation systems can become less efficient. Seals may degrade, pipework may develop leaks or filters can become clogged and reduce airflow. External changes such as renovations, or landscaping adjustments may also influence the systems performance.
Monitoring & Testing
Radon levels can fluctuate due to seasonal changes or building usage and ventilation, which means periodic measurement provides reassurance that protection is being maintained. Continuous monitoring will help identify if radon levels begin to rise, which can prompt investigation before the situation becomes more serious.
Peace of Mind
Regular maintenance will help build confidence that the systems are working as they should be. Knowing the system is checked and functioning provides reassurance that indoor air quality is actively being managed.
This peace of mind is particularly important in environments where occupants spend significant time, such as homes, workplaces, and community facilities.
A Practical Approach to Maintenance
Treating mitigation systems as an ongoing safeguarding process, rather than a one-time installation, helps ensure they continue to protect occupants for years to come.
The experience at Kingswood School serves as a clear reminder that installation is only the first step. Ongoing monitoring and maintenance are what ensure radon mitigation systems continue to deliver the protection they were designed to provide.