PAS 9980:2026: FRAEW, risk and the meaning of proportionate remediation
The revised PAS brings greater structure to external wall appraisal, but its most important message may be what has not changed: finding a defect is not the same as demonstrating an unacceptable risk.
The second edition of PAS 9980 was published in September 2026, replacing PAS 9980:2022. For those involved in fire risk appraisals of external walls (FRAEWs), this is a substantial revision. The document has been reorganised, the assessment process is more clearly structured, risk outcomes have been revised, reporting requirements have been strengthened and new guidance has been introduced on matters including the review of FRAEW reports.
Yet it would be a mistake to interpret PAS 9980:2026 as introducing a fundamentally different approach to external wall risk.
Indeed, BSI makes the position unusually clear. The changes are “not meant to significantly impact the assessment of risk”, and publication of the new edition does not, in itself, invalidate FRAEW reports prepared under PAS 9980:2022.
The underlying principle remains one of risk and proportionality, rather than retrospective compliance.
First ask whether an FRAEW is actually needed
One of the most useful changes appears before the detailed appraisal even begins. PAS 9980:2022 already recognised that not every building required an FRAEW. It cautioned fire risk assessors against unnecessary referrals to specialists and gave traditional masonry construction as an example where external wall risk might readily be considered sufficiently low. PAS 9980:2026 makes this much more explicit.
The scope now covers both determining whether an FRAEW is required and, where it is required, how it should be undertaken. A new process allows consideration of whether either the building or particular external wall construction can reasonably be regarded as sufficiently low risk without progressing to a specialist FRAEW.
This is important. The Fire Safety Order requires external walls to be considered as part of the fire risk assessment of relevant residential buildings. That does not mean every such building requires a PAS 9980 FRAEW. The revised PAS describes the FRAEW as a specialist assessment that might be recommended where the external wall could materially influence overall fire risk.
That distinction should help avoid a process in which an FRA routinely generates a recommendation for an FRAEW, which then routinely generates intrusive investigation, which in turn generates remedial work. Each step requires justification.
A clearer, iterative FRAEW process
Where an FRAEW is necessary, the methodology has been substantially reorganised.
The 2022 edition presented a five-step basic assessment process. The 2026 edition instead provides clearer process diagrams and explicitly describes the FRAEW as iterative. BSI explains that the assessment can be curtailed or expanded depending upon the building and what is discovered as the appraisal progresses. This is more than presentational tidying.
External walls vary enormously. Some can be understood readily from reliable construction information and limited inspection. Others require opening-up, material identification, examination of interfaces or more sophisticated analysis.
The extent of investigation should therefore respond to uncertainty and its significance to the assessment. An FRAEW should not become a predetermined sequence of investigations simply because those investigations are technically possible.
That is an important expression of proportionality in the assessment process itself, before proportionality of remediation is even considered.
Risk rating and risk outcome are not the same thing
Perhaps the most useful clarification in PAS 9980:2026 is the distinction between a risk rating and a risk outcome.
The revised PAS defines the risk rating as the product of the hazard associated with an external wall fire and the likelihood that such a fire will cause harm. Crucially, that rating is established without considering the time, effort or cost involved in reducing the risk.
The risk outcome is different. It concerns the acceptability of that risk rating while taking into account the time, effort and/or cost that might be involved in reducing the risk. That distinction matters enormously in practice.
An assessor might identify combustible material, a discontinuity in cavity barriers, an imperfect interface or some other departure from expected construction. That finding can legitimately influence the risk rating. But it does not follow automatically that the condition must be remediated.
There remains another question. What improvement in life safety would the proposed work actually achieve, and is that intervention proportionate to the risk being addressed?
PAS 9980 is a fire risk appraisal methodology, not a mechanism for turning every identified construction deficiency into a schedule of remedial works.
From three outcomes to four
The revised approach to risk outcomes reinforces this distinction. PAS 9980:2022 used three principal bands: Low, Medium and High. Within Medium, however, the PAS distinguished between risk towards the upper part of the band and “medium (tolerable)” risk.
PAS 9980:2026 separates these into four outcomes: Low; Tolerable; Medium; High.
BSI explains that the new Tolerable outcome corresponds to what was previously “medium (tolerable)”, while Medium now represents the upper part of the former Medium band.
This does not necessarily change the underlying risk represented by a building, but it should make communication considerably clearer.
Most importantly, tolerable does not mean perfect. A building may contain shortcomings. Those shortcomings may increase external wall fire risk above the lowest reasonably conceivable level. Nevertheless, after considering the building, wall construction, fire strategy and consequences of fire, the resulting risk may still be tolerable.
That is a fundamental characteristic of risk assessment.
A defect is not an outcome
Consider a generic existing masonry external wall in which investigation identifies that a cavity barrier is absent from a location where one might ordinarily have been expected. There are several separate questions.
First, what is actually present? Second, what potential mechanism of fire spread does the condition create? Third, what materials are available to support that spread? Fourth, what is the configuration and extent of the cavity? Fifth, what are the potential consequences if fire does spread? And finally, what reduction in risk would retrospective installation of the barrier achieve?
Simply recording “cavity barrier absent” answers only the first part of that reasoning process.
PAS 9980:2026 continues to consider risk factors under three broad headings: fire performance, façade configuration and fire strategy. A risk factor can have a positive, neutral or negative influence on the overall risk rating.
The revised supporting material also retains specific consideration of compartmentation continuation, subdivision and consequence mitigation.
The significance of a construction feature therefore has to be considered in context.
This is particularly important when appraising existing buildings. PAS 9980:2026 states explicitly that a risk-based approach may be informed by prescriptive requirements and guidance applying when the building was designed and constructed, but is not limited by compliance with those requirements or guidance.
There is a significant difference between identifying non-conformity and demonstrating intolerable risk.
Better reporting should expose the reasoning
PAS 9980:2026 also places greater emphasis on how the assessor communicates that reasoning.
BSI identifies the recommendations for FRAEW reports in Clause 15 as being more detailed and prescriptive than in the previous edition. A new Annex B also addresses different forms of FRAEW report review and the value those reviews are expected to provide. This should be welcomed.
A useful FRAEW ought to enable another competent professional to follow the reasoning from:
construction identified → relevant risk factors → significance and weighting → risk rating → risk outcome → recommended action.
Where remediation is recommended, the reader should similarly be able to understand why that particular intervention represents a proportionate response.
The conclusion should not appear simply because a defect appears earlier in the report.
This becomes particularly important where extensive and expensive remediation is proposed. A technically correct observation about an external wall does not, without further analysis, demonstrate that wholesale replacement or reconstruction is necessary.
Other notable changes
The revision contains numerous other changes.
The relationship with the wider FRA process has been updated to reflect BS 9792, which PAS 9980:2026 now supplements while remaining capable of independent use.
Balcony guidance has also been revisited. The 2022 edition necessarily relied heavily upon evidence from real fire incidents. The new edition draws upon research commissioned by the Building Safety Regulator and separates relevant considerations between fire-performance and façade-configuration risk factors. BSI nevertheless notes that the resulting guidance remains broadly similar.
Several historical and legislative annexes have meanwhile been removed. Their content has not necessarily become incorrect; BSI explains that they are now regarded as superfluous to actually conducting an FRAEW.
The overall effect is a document more tightly focused on the appraisal itself.
What about existing PAS 9980:2022 FRAEWs?
There should be no automatic rush to recommission them. PAS 9980:2026 expressly states that publication of the revised edition does not itself invalidate reports prepared under PAS 9980:2022. Whether an existing FRAEW warrants review or updating is for the dutyholder to determine, informed by professional advice and the circumstances of the particular building.
There may, of course, be good reasons to revisit an existing appraisal: new information about the wall construction, deterioration or alteration, revised fire safety arrangements, shortcomings in the original assessment or a material change in circumstances.
The mere existence of a new edition of PAS 9980 is not one of them.
Proportionality remains the point
PAS 9980 emerged partly because applying standards intended for new construction retrospectively to thousands of existing buildings risked producing responses disproportionate to the actual risk. The 2026 revision does not retreat from that position.
Its introduction remains unequivocal: while some blocks have external walls inadequately designed or constructed to resist fire spread, a blanket approach of removing and replacing cladding is disproportionate compared with the associated risk. That sentence is worth remembering.
PAS 9980:2026 gives assessors a clearer methodology, better terminology and stronger expectations for documenting their conclusions. It should improve consistency and make FRAEW reports easier to scrutinise.
But the essential professional task remains unchanged.
Identify the hazard. Understand the mechanism by which it could cause harm. Assess its significance in the context of the building. Then determine what, if anything, it is proportionate to do about it.
Finding a defect is not the same as demonstrating an unacceptable risk. And demonstrating increased risk is not, by itself, justification for disproportionate remediation.
That remains the essence of a properly conducted FRAEW.
Pyrology Insight provides commentary on contemporary fire safety topics. It is intended to stimulate professional discussion and should not be relied upon as project-specific advice.