What’s the Difference Between a Fire Risk Assessment and a Compartmentation Survey — and Do You Need Both?
Blog
Fire safety compliance can feel complex, especially when different types of surveys and assessments are involved. Two of the most important — and most commonly confused — are Fire Risk Assessments (FRAs) and Compartmentation Surveys. While both are essential to understanding and managing fire risk, they actually serve very different purposes.
Fire Risk Assessments
An FRA is a legal requirement under the Regulatory Reform (Fire Safety) Order 2005 for almost all non-domestic premises. Its purpose is to evaluate how well a building prevents, detects, and responds to fire, ensuring that both the structure and the people inside are protected. FRAs are generally non-intrusive, meaning they focus on what can be seen and reasonably accessed without opening up the building fabric. A trained fire risk assessor will systematically review the premises, typically looking at the following key areas:
Checking that alarms, detectors, call points and sounders are correctly installed, tested, and maintained, and that they provide adequate coverage throughout the premises.
Confirming that all escape routes are clearly defined, unobstructed, and lead to a safe place.
Evaluating whether signage, lighting and emergency procedures are sufficient and up-to-date.
Conducting a visual inspection of fire doors and other passive fire protection measures to check for damage and correct operation.
Reviewing the organisation’s management arrangements and staff training to ensure understanding of their roles in an emergency.
An FRA provides the strategic overview of fire safety — highlighting weaknesses, informing decision-making, and ensuring that those with responsibility can demonstrate compliance with fire safety legislation. Importantly, an FRA may also identify areas where a Compartmentation Survey is required. Based on the visual inspection, the assessor might note potential breaches or uncertainties in the building’s fire-resisting construction. In these cases, a Compartmentation Survey becomes an action within the FRA Action Plan, ensuring that any unseen or structural risks are fully investigated.
Compartmentation Surveys
A Compartmentation Survey, on the other hand, goes deeper — literally. Compartmentation is a cornerstone of passive fire protection, designed to contain fire and smoke within defined areas of a building. These surveys are much more intrusive investigations, taking a close look at many building aspects that may compromise building compartmentation.
A Compartmentation Survey often includes:
Inspecting compartments such as walls, floors, cavity barriers and seals between walls.
Checking service penetrations to confirm that any openings made for pipes, cables or ductwork are properly sealed.
Assessing materials, ensuring that the fire-stopping products used are appropriate and installed in accordance with regulations.
Verifying fire damper installation in ductwork that crosses compartment lines to ensure it operates effectively during a fire.
Inspecting dry-lined walls and partitions to confirm compliance with fire resistance standards.
Examining ceiling and roof voids for adequate fire-resistant barriers that prevent fire and smoke from spreading unseen.
Documenting compartmentation lines, recording any breaches or non-compliant features, and clearly recommending remedial actions.
The resulting report provides a detailed, evidence-based understanding of how well your building’s fire compartments will perform in a real fire, and are often supported by photographs, floorplans and prioritised recommendations.
Do You Need Both?
In most cases, yes — both are required. While a Fire Risk Assessment provides an essential overview of a building’s fire safety management and compliance, it does not go deep enough to verify the integrity of compartmentation or fire stopping. An FRA might flag visible issues, such as damaged fire doors or gaps in walls, but it cannot confirm whether hidden elements are correctly protected like a Compartmentation Survey. That’s why a combined approach is best. The FRA identifies the risks, evaluates overall safety, and prioritises corrective actions, whilst the Compartmentation Survey verifies the physical fire barriers that slow the spread of fire and smoke, providing the technical evidence needed to address those risks in detail. Together, they create a full picture of compliance — one that’s both operationally and structurally sound. Without both, it’s easy to have gaps in assurance that only become apparent during an emergency or a regulatory inspection.
How Total Fire Group Can Help
At Total Fire Group, we deliver both independent Fire Risk Assessments and detailed Compartmentation Surveys to give a complete picture of fire safety performance. Our consultants work together to identify where structural issues overlap with management gaps , helping clients prioritise remedial actions efficiently and stay compliant with confidence. “Entering the new year, we are pleased to expand our fire safety services to include professional Compartmentation Surveys, complementing our established Fire Risk Assessments.” Darren Baird DMS, MIFireE, MIFSM Group Director Whether you’re managing residential blocks, commercial premises or complex multi-use buildings, having both assessments ensures your fire safety strategy is thorough, evidence-based, and defensible.