A fire alarm sounds at 4.45pm, just as the office is thinning out, the workshop team is changing shift and the manager responsible for fire safety is off site. This is when the question of how many fire wardens you need becomes practical rather than theoretical. The right number is the number that allows people to be warned, guided out and accounted for safely – regardless of who is absent, where they are working or when an incident occurs.

There is no single legal number for every workplace. A small, single-storey shop may need one trained fire warden with reliable cover, while a multi-floor office, busy warehouse or serviced accommodation operation may need several people across different areas and shifts. Your fire risk assessment should determine the arrangement.

How many fire wardens are required by law?

UK fire safety law does not set a fixed ratio of fire wardens to employees. In Scotland, duty holders must take appropriate fire safety measures, including putting suitable procedures in place for serious and imminent danger. For most workplaces, that means appointing competent people to help implement emergency arrangements where the risks and size of the premises require it.

The responsible person or duty holder remains accountable. Appointing fire wardens does not transfer that responsibility. Their role is to support the emergency plan: helping occupants leave by safe routes, checking only areas they can check without taking personal risks, reporting concerns and assisting with roll calls at the assembly point.

A sensible approach is to identify what must happen during an evacuation, then make sure enough trained people are available to do it. This is more reliable than choosing an arbitrary number based only on headcount.

The factors that decide how many fire wardens you need

Start with the findings of your fire risk assessment. It should consider the premises, the people who use it, likely fire hazards and the effectiveness of existing controls. The following factors usually have the greatest effect on fire warden numbers.

Size, layout and escape routes

A compact unit with one public entrance and a clear exit route is easier to manage than a building with several floors, separate departments, rear exits, stairwells and storage areas. Each floor, zone or distinct work area may require a designated warden, particularly where occupants could be out of sight or unaware of an alarm.

Fire wardens should not be expected to cover areas that cannot be reached quickly and safely. A person based on the ground floor may not be an appropriate choice to check an upper floor, especially if smoke could affect the only stairway.

Number and type of occupants

Consider everyone who may be in the building, not just permanent employees. This includes visitors, contractors, customers, agency staff and people attending meetings or events. A retail premises may need more active evacuation support than an office with the same staff number because customers will not know the layout, exits or assembly arrangements.

You must also consider people who could need additional assistance. This may include people with reduced mobility, sensory impairments, temporary injuries, pregnancy, language barriers or anyone unfamiliar with the building. Personal emergency evacuation plans may be required for individuals, but fire warden coverage must also be sufficient to manage the wider evacuation safely.

Shift patterns, lone working and absence cover

The number written on an organisational chart is irrelevant if those wardens are not present when the alarm sounds. Cover must reflect early starts, late finishes, nights, weekends, holidays, sickness and hybrid working.

For example, a business may have six trained fire wardens in total but only two staff on site after 5pm. If the premises needs wardens in three separate areas, the evening arrangement is inadequate. Review the people actually available during each operating period.

Fire risk and the nature of the work

Higher-risk environments require more careful planning. Workshops, kitchens, plant rooms, storage areas, premises with flammable liquids, and sites where hot works take place may have a greater likelihood of fire or a more rapidly developing incident. The same applies where smoke, noise or machinery could delay awareness of an alarm.

More wardens alone do not reduce the underlying risk. Suitable extinguishers, alarm systems, escape routes, emergency lighting, housekeeping and staff training remain essential. Fire wardens are part of the control system, not a substitute for it.

A practical way to set your fire warden numbers

There is no universal formula, but many workplaces use a starting point such as one warden for each floor or defined zone, with an additional trained deputy. That starting point must then be tested against your actual occupancy and shift cover.

Walk through a realistic evacuation scenario. Who raises the alarm? Who guides visitors from the reception area? Who checks that a meeting room, toilets or staff rest area have been cleared, provided it is safe to do so? Who meets the fire and rescue service? Who takes the register at the assembly point? If one person is absent, who takes over?

The answers may show that a small workplace needs two trained people rather than one, simply to ensure cover. A larger premises may need a lead fire warden coordinating several wardens assigned to floors or departments. In multi-occupancy buildings, each tenant should understand their own responsibilities as well as any shared evacuation procedures.

Do not ask wardens to search smoke-filled rooms, fight a fire or delay their own evacuation. Their priority is life safety. If there is immediate danger, they should leave, report relevant information to the fire and rescue service and ensure nobody re-enters the building.

What a fire warden should be trained to do

Training should match the premises and emergency plan. A competent fire warden should understand the alarm procedure, escape routes, assembly point, methods for assisting visitors and the limits of their role. They should know where fire-fighting equipment is located and when it is safe to use it, but no one should be expected to tackle a fire without suitable training, a clear escape route and confidence that it is safe.

They should also be able to identify routine concerns such as blocked exits, wedged fire doors, missing signage, poor housekeeping or extinguishers that have been moved, damaged or not serviced. Reporting these issues promptly helps prevent a small lapse becoming a serious failure during an emergency.

Training is not a one-off exercise. Refresher training, induction for new staff and evacuation drills help ensure arrangements remain understood. Drills can reveal issues that paperwork misses, such as an assembly point that is too close to vehicle movements or a department that routinely fails to hear the alarm.

Keep records and review after changes

Your fire risk assessment should record why the selected number of fire wardens is suitable for the premises. Keep training records, warden lists, drill outcomes and any actions taken after inspections. Clear records demonstrate that fire safety has been actively managed and help maintain continuity when managers or staff change.

Review the arrangement whenever you alter the layout, introduce new processes, change operating hours, increase occupancy, refurbish the building or identify a problem during a drill. A business that has expanded from a small office into several units should not rely on the fire warden arrangement it had at the start.

For landlords and operators of short-term lets, responsibilities will differ according to the property and management arrangements. However, the same principle applies: emergency measures must be proportionate, understood and workable for the people using the premises.

Get the wider fire safety controls right

A capable team of fire wardens cannot compensate for an inadequate fire safety system. Escape routes must be kept clear, fire doors must close properly, alarms must be maintained, and extinguishers must be correctly selected, sited and serviced. These measures support a fast, controlled evacuation and help protect people, property and business continuity.

EXSERVICE supports businesses across Glasgow and the central belt with practical fire risk assessments and fire extinguisher servicing that help duty holders identify gaps before an emergency exposes them. The aim is not to create unnecessary administration. It is to make sure the arrangements you rely on will work when they are needed.

The most useful question is not simply how many names appear on the fire warden list. Ask whether enough trained, available people can manage a safe evacuation on your busiest day, your quietest shift and when someone is unexpectedly absent. If the answer is uncertain, your fire safety arrangements need attention before the alarm sounds.