Fire Risk Assessment vs Compartmentation Survey

The main difference is breadth versus depth.

A fire risk assessment looks across the full fire safety arrangements for the premises. Depending on the building, this may include:

• Ignition sources and combustible materials
• People who may be especially at risk
• Escape routes and final exits
• Fire detection and alarm systems
• Emergency lighting
• Fire doors and compartmentation
• Firefighting equipment
• Evacuation procedures
• Maintenance and testing records

Its purpose is to identify significant risks and decide whether the fire precautions are suitable for the way the building is occupied and managed.

A fire compartmentation assessment concentrates on the construction intended to contain fire and smoke. Government guidance describes compartmentation as fire-resisting walls and floors together with protection to openings such as fire doors, glazing, service penetrations and ductwork.

The output is usually a location-based defect schedule supported by photographs or marked-up plans. It should provide enough information to understand the extent of the defects and decide whether further opening-up or remedial pricing is required.

Yes. A suitable fire risk assessment should consider whether the building’s compartmentation appears adequate for the risk. However, this does not mean every FRA includes a detailed or intrusive compartmentation survey.

During a standard assessment, the assessor may look for:

• Openings around cables, pipes and ducts
• Damage to fire-resisting walls or ceilings
• Unprotected risers or service cupboards
• Poorly maintained fire doors
• Missing fire-stopping materials
• Alterations passing through compartment lines
• Differences between the building and available fire strategy information

The assessor may identify a concern without being able to establish its full extent. Concealed voids, boxed-in services, inaccessible ceiling spaces and occupied areas can all limit what is visible.

The answer to “does a fire risk assessment check compartmentation?” is therefore normally yes at a proportionate level, but not necessarily in enough detail to specify remedial work.

In England and Wales, the Fire Safety Act 2021 clarified that, for multi-occupied residential buildings, the structure, external walls and flat entrance doors opening onto common parts fall within the scope of the Fire Safety Order.

A separate survey is appropriate where the FRA identifies concerns that cannot be resolved through visual assessment alone.

Typical triggers include:

• Widespread breaches around building services
• Major refurbishment or layout changes
• Missing or unreliable fire strategy information
• Concerns about concealed walls, floors or roof voids
• Poor-quality previous fire-stopping work
• Uncertainty over the position of compartment lines
• A planned remedial programme requiring a defined scope

For example, an assessor may identify several unsealed penetrations inside accessible communal cupboards. This may suggest a wider problem within risers and ceiling voids. The FRA can record the concern, but a compartmentation survey is needed to establish where the defects are, how extensive they are and what needs to be repaired.

The same issue can arise in commercial premises. Following an office conversion or warehouse services installation, new cables, pipework or ductwork may have passed through compartment walls. A visual FRA may identify visible concerns, while a dedicated survey is needed to examine the wider route of the services and record each affected location.

The next stages are covered in What Happens After a Fire Risk Assessment and Understanding a Fire Risk Assessment Action Plan.

An intrusive FRA should not automatically be treated as the same service as a compartmentation survey. Type 2 Fire Risk Assessment Explained and Type 4 Fire Risk Assessment Explained cover intrusive assessment types used for certain blocks of flats, but their purpose still differs from a dedicated survey of compartment lines.

The scope should reflect the building, the information available and the reason for the investigation.

It may include:

• The buildings, floors and areas to be inspected
• Known or assumed compartment lines
• Walls, floors, ceilings and roof voids
• Service risers, plant rooms and cupboards
• Pipes, cables, trays, ducts and dampers
• Fire doors forming part of compartment boundaries
• Accessible and inaccessible areas
• The permitted level of opening-up
• Making-good and reinstatement responsibilities
• Photographic and drawing requirements
• Defect classifications and priorities

The survey should state its limitations. A non-intrusive inspection cannot confirm concealed construction that was not accessible. An intrusive survey may provide more certainty, but access, making-good, asbestos information and occupied areas need to be planned in advance.

Compartmentation Surveys Explained provides a fuller guide to inspection methods, survey outputs and the information needed before remedial work is commissioned.

A recommendation for an “FRA compartmentation survey” is often too vague to send directly to bidders. The phrase may be used informally, but it does not define the areas, inspection level or deliverables required.

Before requesting quotations, the tender pack should identify:

• Why the survey is required
• The properties and areas included
• Available plans and fire strategy documents
• Known defects or previous reports
• Whether the survey is visual or intrusive
• Access and resident-management requirements
• Restrictions on opening-up
• Required reports, drawings and defect schedules
• The programme and handover format

The same information should be issued to every bidder. Otherwise, one company may allow for opening ceilings and risers while another prices only visible communal areas.

How Commercial Fire Protection Tendering Works explains how a controlled scope, shared clarifications and consistent submission format make specialist quotations easier to compare.

Where the requirement includes a new FRA, a review of an existing assessment or assessments across several premises, suitable Fire Risk Assessment Companies can be compared against the same defined brief. Portfolio requirements can also be issued through Fire Risk Assessment Tenders.

A reliable proposal should confirm:

• Relevant experience with the building type
• The competence of the survey team
• The proposed inspection methodology
• Whether access equipment or opening-up is included
• Assumptions and exclusions
• The report and drawing format
• How defects will be referenced and prioritised
• The programme and quality-assurance process

Where the provider also carries out remedial work, the survey should still produce a clear, evidence-based record of defects. The person commissioning the work should be able to compare the findings and proposed scope rather than rely on an undefined allowance.

A structured procurement process keeps the issued documents, bidder questions, clarifications and submissions within one controlled record. This reduces the risk of different companies inspecting or pricing different areas.

A common mistake is assuming that an FRA confirms every compartment wall and service penetration. A standard assessment is risk-based and proportionate; it is not automatically a full opening-up exercise.

Another mistake is commissioning remedial fire stopping directly from a short FRA recommendation. Without locations, quantities and inspection evidence, prices are likely to contain different assumptions and provisional sums.

A compartmentation survey also does not replace the FRA. It examines one part of the building’s passive fire protection, not the wider hazards, management arrangements, evacuation procedures and active fire safety systems.

Photographs alone do not make a survey suitable for procurement. The report needs a clear scope, location references, limitations and findings that can be converted into controlled actions.

Is Compartmentation Always Checked During an FRA?

It should be considered at a level appropriate to the building and assessment scope. Visible defects may be recorded, but concealed construction will not normally be confirmed without further investigation.

Is a Compartmentation Survey Intrusive?

It can be visual, intrusive or a combination of both. The scope should state which areas can be opened, who will reinstate them and what limitations will remain.

Can Fire-Stopping Work Be Priced from an FRA?

Only where the FRA provides enough location and defect information. Broader recommendations usually need a survey and defect schedule before fixed prices can be compared properly.

Does a Compartmentation Survey Replace a Fire Risk Assessment?

No. It examines fire-resisting construction and associated openings. The FRA considers the wider fire risks and management arrangements across the premises.

Does the Building Need a Wider Fire Risk Review?

Where the building needs an overall assessment, the existing FRA is no longer suitable or the findings require clarification, compare competent Fire Risk Assessment Companies with experience of the relevant premises type.

Is the Concern Limited to Compartmentation?

Where the concern is specifically about fire-resisting walls, floors, service penetrations or concealed barriers, start with Compartmentation Surveys Explained to define the inspection scope before requesting remedial prices.

Is There a Defined FRA Requirement Ready to Issue?

For multi-building assessments or other defined FRA requirements, Fire Risk Assessment Tenders provides a structured route for issuing one commercial brief and comparing submissions consistently.