Fire Stopping Remedial Works: Why Fire Stopping Surveys Are Essential

Fire stopping plays a critical role in maintaining the fire safety of a building. When compartment walls, floors and ceilings are breached by services or building works, those openings must be properly sealed to help prevent the spread of fire and smoke. Where this is not done correctly, the performance of the building's passive fire protection can be significantly reduced.

In many cases, fire stopping defects are first identified during a fire risk assessment. However, it is important to understand that a fire risk assessment does not always reveal the full extent of the issue. Many fire stopping breaches can remain hidden above suspended ceilings, within ceiling voids, inside service risers, behind boxing, or in other concealed areas.

For that reason, where defects are identified, it is often good practice to commission a fire stopping survey to establish the full scope of the problem.

What Is Fire Stopping?

Fire stopping refers to the sealing of gaps, joints and service penetrations in fire-resisting walls, floors and ceilings. Its purpose is to maintain the integrity of the compartmentation within the building and reduce the spread of fire, smoke and hot gases from one area to another.

Typical examples of fire stopping include sealing around:

Without suitable fire stopping in place, even a small penetration can compromise a compartment wall or floor.

How Are Fire Stopping Issues Identified?

Fire stopping problems are commonly identified during a fire risk assessment, particularly where visible gaps or poor sealing arrangements are noted around service penetrations. However, a fire risk assessment is not usually a destructive inspection, and it may only identify defects that are readily visible at the time of the inspection.

This means that issues above suspended ceilings or within hidden voids may not be apparent. In buildings where regular alterations have taken place, there is often a greater likelihood that concealed breaches exist.

Why a Fire Stopping Survey Is Often Needed

Where fire stopping issues have been noted, a fire stopping survey can provide a far more detailed review of the building's compartmentation. The purpose of the survey is to inspect known and accessible compartment lines, identify breaches, and determine the likely extent of remedial works required.

A dedicated survey is particularly useful because it can:

• Identify hidden or overlooked fire stopping breaches
• Provide a clearer understanding of the condition of compartmentation
• Support budgeting and planning for remedial works
• Form the basis of a scope of works for contractors tendering for the repairs

This is often the most practical next step once defects have been raised within a fire risk assessment.

Why Fire Strategy Drawings Are Important

To properly assess fire compartmentation within a building, the inspector will often need access to up-to-date fire strategy drawings. These drawings help identify where the compartment walls, compartment floors and protected shafts are located.

This is important because not every wall or ceiling within a building is necessarily required to provide fire resistance. Fire strategy drawings help the surveyor understand which elements are intended to form part of the fire-resisting structure, allowing the inspection to focus on areas where fire stopping is actually required.

Without this information, it can be more difficult to determine whether a breach affects a compartment line and whether remedial works are necessary.

Using a Fire Stopping Survey as a Scope of Works

Once the survey has been completed, it can be used as a scope of works when obtaining quotations for fire stopping remedial works. This is a valuable step because it helps ensure contractors are pricing against the same information and allows the client to compare quotations on a like-for-like basis.

A properly prepared survey can also reduce the risk of important defects being omitted from the tender process. This helps improve the quality of the remedial works and gives the client greater confidence that the required repairs have been clearly identified.

Why Periodic Fire Stopping Surveys Are Good Practice

In buildings that undergo frequent change — such as offices, commercial premises, mixed-use developments and buildings subject to regular fit-out works — new breaches can occur over time. Electricians, plumbers, data installers and other contractors may introduce new penetrations through fire-resisting walls and ceilings, and these are not always adequately sealed afterwards.

For that reason, it is sensible to consider periodic fire stopping surveys, particularly in buildings where:

Breaches in compartmentation can easily go unnoticed if they are not visible during routine inspections.

The Importance of Proper Fire Stopping Remedial Works

Once defects have been identified, remedial works should be completed using suitable tested fire stopping systems appropriate to the type of wall, floor, ceiling or service penetration involved. Poor repairs or untested solutions can undermine the intended level of fire resistance and may not provide adequate protection in the event of a fire.

Fire stopping remedial works are therefore not simply about filling gaps. They are about restoring the fire-resisting performance of the building's compartmentation in a way that is appropriate, consistent and properly considered.