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Do All Commercial Buildings Need Fire Doors?

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Commercial fire safety

Commercial fire safety is about far more than meeting legal obligations. It is about protecting lives, safeguarding property and ensuring that businesses can continue operating safely should the worst happen. Among the many elements that contribute to an effective fire safety strategy, fire doors remain one of the most important. Yet many business owners, landlords and facilities managers still ask the same question. Do all commercial buildings need fire doors?

The answer is not quite as straightforward as many people expect. While not every doorway within a commercial building requires a fire door, the vast majority of commercial premises will contain fire doors in key locations. Their installation depends on the building’s design, its use, the findings of a fire risk assessment and the relevant fire safety legislation.

Understanding where fire doors are required and ensuring they remain compliant is essential for anyone responsible for managing commercial property throughout Dorset and the South Coast.

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Do all commercial buildings need fire doors?

Most commercial buildings require fire doors in specific locations rather than throughout the entire building. Fire doors are installed to slow the spread of fire and smoke, protect escape routes and help occupants evacuate safely. The exact requirements depend on the building’s layout, its purpose, occupancy levels and the findings of a professional fire risk assessment.

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Why are fire doors so important?

A fire door is a specially engineered safety product designed to resist fire and smoke for a specified period of time. Unlike a standard timber door, every component has been tested to perform together as part of a certified fire door assembly.

This includes the door leaf, frame, hinges, seals, glazing, locks and ironmongery. If any one of these components is replaced with an unsuitable alternative, the performance of the entire door may be compromised.

When correctly installed and maintained, fire doors help to contain a fire within one area of a building. This process, known as compartmentation, prevents flames and toxic smoke from spreading rapidly through the premises.

The additional time provided by effective compartmentation allows occupants to escape safely while giving the Fire and Rescue Service valuable time to respond.

Without compliant fire doors, a relatively small fire can spread quickly throughout a building, dramatically increasing the risk to life and causing far greater damage to the property.

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What does the law say?

Fire door requirements in England are largely governed by the Regulatory Reform (Fire Safety) Order 2005.

This legislation places legal responsibility on the Responsible Person, who may be the employer, landlord, managing agent or building owner depending on the circumstances.

The Responsible Person must take reasonable steps to reduce fire risks and ensure suitable fire precautions are in place. This includes carrying out regular fire risk assessments and maintaining all fire safety measures, including fire doors.

In addition to the Fire Safety Order, guidance is provided through Approved Document B of the Building Regulations, along with British Standards that cover fire door installation, inspection and maintenance.

Together, these documents help determine where fire doors should be installed and how they should be maintained throughout their service life.

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Which commercial buildings typically require fire doors?

Although every building is assessed individually, fire doors are commonly found in a wide range of commercial premises.

These include:

Offices

Office buildings often contain multiple escape routes, stairwells, plant rooms and compartment walls. Fire doors help prevent smoke from spreading through corridors and staircases, allowing staff and visitors to leave safely during an emergency.

Schools and colleges

Educational buildings contain large numbers of occupants, many of whom may be unfamiliar with evacuation procedures. Fire doors play an essential role in protecting classrooms, corridors, assembly halls and escape routes.

Healthcare facilities

Hospitals, medical centres, dental practices and care homes rely heavily on effective compartmentation. In many cases, patients cannot evacuate immediately, making properly functioning fire doors an essential element of life safety.

Hotels and guest accommodation

Hotels, guest houses and serviced accommodation often contain sleeping occupants who may not become aware of a fire immediately. Fire doors help contain fire while protecting bedrooms, corridors and stairwells.
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Are there situations where fire doors may not be required?

There are some circumstances where fire doors may not be necessary on every internal doorway.

For example, a small single storey commercial building with a straightforward layout and minimal fire risk may require fewer fire doors than a large multi occupied office complex.

Likewise, modern buildings designed with alternative fire engineering solutions may achieve compliance through different methods while still providing appropriate protection.

However, these decisions should never be based on assumption.

Only a competent fire risk assessment can determine whether fire doors are required and where they should be located.

Removing or replacing a fire door without proper professional advice can seriously compromise a building’s fire strategy and place occupants at unnecessary risk.

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Fire risk assessments determine the requirements

Every commercial building should have a suitable and sufficient fire risk assessment.

This assessment evaluates factors including:

  • The size and layout of the building.
  • The number of occupants.
  • The activities taking place within the premises.
  • The likelihood of fire starting.
  • Escape routes.
  • Existing fire protection measures.
  • Structural compartmentation.
  • The condition of existing fire doors.

The findings determine where fire doors should be installed, upgraded, repaired or replaced.

Simply assuming that a building already complies because fire doors are present is a common and potentially costly mistake.

Many inspections reveal damaged doors, missing smoke seals, poorly fitted frames, unsuitable hardware or alterations that have significantly reduced fire performance.

These defects may not be obvious to an untrained eye, which is why regular professional inspections are so important.

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Common fire door defects that affect compliance

Even where fire doors have been installed correctly, they must continue to perform as intended throughout their lifespan. Everyday use can gradually affect their condition, while unauthorised alterations may reduce their ability to withstand fire and smoke.

Some of the most common defects identified during professional inspections include:

  • Damaged or missing intumescent and smoke seals.
  • Excessive gaps around the edges of the door.
  • Hinges that have become loose or worn.
  • Fire doors that fail to close fully.
  • Damaged frames.
  • Glazing that is no longer compliant.
  • Letterboxes, locks or vision panels that have been installed incorrectly.
  • Doors that have been wedged open.
  • General wear that prevents the door from operating correctly.

Although these issues may appear relatively minor, they can significantly reduce the effectiveness of a fire door during an emergency. In some cases, a door that appears perfectly serviceable may fail to provide the level of protection for which it was originally certified.

For this reason, fire doors should never be altered or repaired using unsuitable components. Every replacement part should be compatible with the original fire door assembly to maintain its certified performance.

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The importance of regular fire door inspections

Installing compliant fire doors is only one part of meeting your legal responsibilities. Ongoing inspections and maintenance are equally important.

Over time, buildings settle, hardware wears, and doors receive frequent use. These changes can gradually affect performance without being immediately obvious.

Routine inspections allow potential issues to be identified before they become serious compliance concerns. They also provide reassurance that the building’s fire protection measures remain effective.

A professional inspection typically includes checking:

  • The condition of the door leaf and frame.
  • Gaps around the perimeter.
  • Smoke and intumescent seals.
  • Hinges and ironmongery.
  • Self closing devices.
  • Fire rated glazing.
  • Signage.
  • Overall operation and certification where applicable.

Where defects are identified, remedial work can often restore compliance without requiring a complete replacement, although severely damaged or incorrectly installed fire doors may need to be replaced entirely.

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Conclusion

While not every doorway within a commercial property requires a fire door, the overwhelming majority of commercial buildings rely on them to protect escape routes, contain fire and safeguard occupants.

The exact requirements depend upon the building itself, its use and the findings of a suitable fire risk assessment. What remains consistent, however, is the importance of ensuring that every fire door present is correctly installed, professionally maintained and functioning exactly as intended.

Ignoring damaged or poorly maintained fire doors can expose businesses to significant legal, financial and safety risks. By arranging regular inspections and addressing any issues promptly, organisations can demonstrate compliance while protecting both people and property.

If you are unsure whether your commercial building meets current fire door requirements, Coreworks Property Services can provide expert advice, professional inspections, certified installations and remedial works throughout Dorset and the South Coast.

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Frequently Asked Questions
Not every internal doorway requires a fire door. However, most commercial buildings will require fire doors in specific locations based on their fire risk assessment, layout and intended use.
Fire doors should be checked regularly as part of ongoing building maintenance. Professional inspections should be carried out at appropriate intervals depending on the type and use of the building, with higher risk premises often requiring more frequent inspections.
In many cases, yes. Minor defects can often be rectified through professional remedial work. If the damage is extensive or the certification has been compromised, replacement may be the safest and most compliant option.
Responsibility usually rests with the Responsible Person, which may be the employer, landlord, building owner or managing agent, depending on the premises.