When Is Face Fit Testing a Legal Requirement?

If your employees wear tight fitting respiratory protective equipment (RPE) at work, you may be legally required to carry out face fit testing.

Many employers understand the importance of providing respiratory masks, but fewer realise that simply issuing a mask isn’t enough. Unless the mask forms an effective seal against the wearer’s face, it may not provide the level of protection it was designed to deliver.

In this guide, we’ll explain when face fit testing is legally required, who needs it, and how it helps businesses meet their health and safety responsibilities.

What is Face Fit Testing?

Face fit testing is a process used to check whether a tight-fitting respirator creates an effective seal against an individual’s face.

Everyone’s face shape is different, so the same make and model of mask may fit one person correctly but fail to protect another.

A successful face fit test confirms that a specific mask provides an adequate seal for the wearer, helping to reduce exposure to hazardous dust, fumes, fibres, vapours, or other airborne contaminants. The HSE states that tight fitting RPE should be fit tested as part of the selection process where it is used as a control measure.

Is a Face Fit Testing a Legal Requirement?

Yes, in many workplaces it is.

Face fit testing is required whenever:

• Employees wear tight fitting respiratory protective equipment (RPE).
• Respiratory protection is needed to control exposure to hazardous substances.
• The mask relies on a close-fitting seal to provide protection.

These requirements form part of UK health and safety legislation, including the Control of Substances Hazardous to Health (COSHH) Regulations. HSE guidance makes clear that employers using tight fitting RPE as a control measure should ensure it is fit tested by a competent person.

Who Needs Face Fit Testing?

Face fit testing is commonly required for employees working with:

• Construction dust
• Silica dust
• Wood dust
• Asbestos
• Paint spraying
• Welding fumes
• Chemicals and hazardous substances
• Manufacturing processes

Is One Face Fit Test Enough?

It is recommended by the British Safety Industry Federation (BSIF) that you should retest your mask at least every 2 years unless there are significant changes, such as

• A different size of respirator is issued.
• Significant weight is gained or lost.
• Facial surgery or major dental work affects the fit.
• Different PPE is being worn.

If a new mask is being worn a new Face fit test would need to be carried out.

Why Face Fit Testing Matters

Providing respiratory protective equipment is only one part of protecting your workforce.

If a respirator doesn’t fit correctly, harmful airborne substances can bypass the mask and be inhaled by the wearer. A properly fitted mask helps ensure the respiratory protection performs as intended, giving employees the best possible protection while supporting compliance with UK health and safety legislation.

Face fit testing also provides confidence that employees know how to correctly wear, adjust, and check their respirator before use.

Book Your Qualitative Face Fit Test

Safety For Business provides qualitative face fit testing for individuals and businesses from our training centre in Letchworth Garden City, as well as onsite at workplaces across Hertfordshire and the surrounding areas.

Our service includes:

• Qualitative face fit testing
• Practical guidance on correctly fitting respiratory masks
• Completion of all required documentation
• Individual appointments or onsite business testing

Whether you need testing for a single employee or your entire workforce, we’re here to help you stay compliant and protect your team.

Find out more about our Face Fit Testing service or contact us to book your appointment.