Understanding External-Wall Risk: What Good Identification Looks Like

Understanding external-wall risk starts with understanding what is actually there.

For building owners, this can be more difficult than it sounds. Existing buildings may have undergone multiple phases of design, construction, refurbishment and alteration, with information spread across drawings, specifications, surveys, product information and previous assessments. In some cases, the available information may be incomplete, inconsistent or no longer representative of the building as it exists today.

This is why identifying materials alone is not enough.

Building the Evidence Base

A robust approach to external-wall risk begins with establishing a reliable evidence base. This means understanding the construction, materials, interfaces and condition of the external wall, while also being clear about what is known, what is uncertain and where further investigation may be necessary.

Where a detailed Fire Risk Appraisal of External Walls (FRAEW) is required, PAS 9980 provides a structured methodology for assessing the risk posed by external-wall construction and cladding in existing multi-occupied residential buildings. Its purpose is not simply to identify combustible materials, but to assess the risk of fire spreading over or within the external wall and determine whether remediation or other mitigating measures may be necessary.

This requires the external wall to be considered in the context of the building as a whole.

Understanding Significance, Not Just Presence

The presence of a particular material does not, by itself, determine the level of risk.

The assessment needs to consider how the external wall is constructed, how different components interact, the potential for fire spread, the building's characteristics and fire safety arrangements and the circumstances in which occupants could be affected.

Government guidance supporting PAS 9980 highlights the importance of considering factors including the combustibility and fire performance of the external-wall construction, the likelihood of secondary fires, potential consequences for occupants, fire and rescue service intervention, the time available for escape and the effectiveness of fire safety management.

This is what turns information about a façade into an understanding of risk.

Managing Uncertainty

Existing buildings rarely provide perfect information.

 For existing buildings, intrusive investigation is often necessary to establish and confirm the actual external-wall construction and build on the available evidence. The extent of investigation should be proportionate to the circumstances of the building and the information already available.

Where information is incomplete, that uncertainty should not disappear from the final assessment. It should be identified, understood and appropriately reflected in the decision-making process.

A strong assessment therefore does more than reach a conclusion. It explains the evidence on which that conclusion is based, the limitations of that evidence and, where relevant, why further investigation was or was not considered necessary.

Identification is the Beginning of the Journey

A robust Identification stage should leave the building owner with more than a report. It should provide a clearer understanding of:

• What the external-wall construction comprises
• What evidence is available and how reliable it is
• What risks have been identified
• What uncertainties remain
• What those findings mean for the building

That understanding provides the foundation for the next stage of the external-wall risk journey.

The question is no longer simply: “What materials are present?”

It becomes: “What does the evidence tell us about the risk, and what does that mean for the appropriate response?”

That is the point at which Identification begins to lead into Resolution.

At Jensen Hughes, we believe that effective external-wall risk management starts with establishing the right evidence and understanding what it means in the context of the building. Our combined façade and fire expertise allows us to bring together the technical understanding needed to support proportionate, evidence-led decisions.

The objective is not simply to produce an assessment, but to give building owners the confidence to understand the risk, understand the remaining uncertainties and determine what needs to happen next.

Identification is therefore the beginning of the journey, providing the foundation for determining the right response.