Compartmentation in Residential Buildings: A Guide

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September 28, 2026

Compartmentation in Residential Buildings: From Survey Findings to a Manageable Remedial Programme

For housing associations and local authorities, maintaining effective fire compartmentation across a residential portfolio can be a significant challenge. 

With multiple blocks, different construction types, varying building ages and thousands of residents, compartmentation surveys can uncover a substantial number of defects. Repeated issues may appear in several buildings, while access constraints, resident disruption and limited budgets can make immediate remediation of every finding unrealistic. 

So, what happens after the survey? 

The key is turning survey findings into a clear, proportionate and manageable remedial programme. 

A survey is only the beginning

A compartmentation survey provides valuable information about the condition of fire-resisting construction within a building. 

It can identify issues such as:

But a long list of findings does not automatically translate into a long list of immediate remedial works.

The next step is understanding which findings matter most, why they matter, and what needs to happen next. 

The challenge of large residential portfolios

For organisations responsible for hundreds or thousands of homes, the scale of the problem can quickly become overwhelming.

A survey of one block may identify a manageable number of issues. Multiply that across 20, 50 or 100 buildings, and the resulting remedial programme can become substantial.

There may also be common defects appearing repeatedly across the portfolio.

For example, if the same type of penetration or fire-stopping defects has been identified across multiple blocks, this could provide an opportunity to develop consistent approach to remediation rather than treating every individual defect as a completely separate project. 

Portfolio-wide data can therefore be just as valuable as the findings within an individual building. 

Not every defect needs to be treated the same way

One of the most important stages is prioritisation.

Compartmentation defects should be considered in the context of the building, its construction, occupancy, fire strategy and the location and nature of the defect. 

Who defects that appear similar may not necessarily present the same level of risk. 

This is why a proportionate approach is important. 

Rather than simply creating a large list of defects and assigning the same urgency to everything, findings can be considered and prioritised according to their significance.

This can help Responsible Persons and building owners identify:

What needs attention now?

What should form part of planned remedial works?

What can be coordinated with other maintenance or refurbishment programmes?

What requires further investigation before a decision can be made?

The objective is not to minimise the findings. It is to make sure the response to those findings is appropriate to the risk.

Resident access can be just as important as the technical solution

Residential building presents another challenge that does not always feature in the technical survey itself: people live there. 

Access to individual flats may be required to investigate or remediate defects. Residents may have work, mobility requirements, caring responsibilities or other circumstances that make arranging access difficult. 

Repeated visits can also create frustration for residents and additional administrative work for housing teams.

A well-planned remedial programme should therefore consider access from the outset.

Where possible, works can be coordinated to reduce unnecessary visits and minimise disruption.

This could mean grouping works by block, floor of area, coordinating compartmentation repairs with other planned maintenance or considering access requirements when determining the order in which buildings are addressed.

Good fire safety management is not simply about the technical solution. It is also about how that solution can realistically be delivered. 

Programming works across multiple blocks

Once findings have been prioritised, the next challenge is creating a programme that works in practice.

For a large portfolio, this may involve balancing:

  • The significance of identified defects
  • Building risk
  • Residents access
  • Contractor availability
  • Budget availability
  • Planned refurbishment programmes
  • Other statutory or maintenance works
  • The availability of suitable information and records
  • The practical sequencing of works

A programme that attempts to remediate everything simultaneously may not be realistic. 

Instead, a phased approach can provide a more manageable route forward. 

For example: 

01

Phase 1 - Higher priority works

Address findings requiring more mediate attention.

02

Phase 2 - Planned remedial works

Coordinate appropriate works with existing maintenance or refurbishment programmes.

03

Phase 3 - Lower-priority or more complex works

Plan works that require additional investigation, specialist access or longer-term budgeting.

The exact approach will depend on the portfolio and the risks identified. There is no one-size-fits-all programme. 

Look for the patterns, not just the individual defects

When dealing with a large portfolio, it is worth stepping back and looking at the bigger picture. 

Are the same defects appearing repeatedly? 

Are particular types of construction generating similar findings?

Are defects concentrated around particular services or refurbishment works?

Are certain blocks experiencing significantly more issues than others?

Identifying these patterns can help organisations move from a reactive approach to a more strategic one. 

For example, repeated defects associated with a particular type of service installation may indicate an opportunity to review how future works are specified, installed and inspected.

This can help prevent the same problems from simply reappearing after remediation.

From survey data to a practical action plan

The ultimate value of a compartmentation survey is not the number of defects identified. 

It is the ability to use those findings to make informed decisions.

Fir residential portfolios, this means moving through a process of: 

Survey → Understand → Prioritise → Programme → Remediate → Review

The result should be a clear understanding of the condition of the portfolio, the risks that require attention and a realistic plan for addressing them. 

Importantly, this does not necessarily mean trying to complete every remedial action at once. 

A proportionate and risk-based programme can allow organisations to address the most significant issues while managing budgets, resources and resident disruption responsibly. 

A manageable programme is better than an unmanageable list

For housing associations and local authorities, compartmentation can be a long-term programme rather than a one-off exercise. 

Buildings change. Services are installed. Refurbishments take place. Maintenance works can create new penetrations, New information can also change our understanding of existing construction.

That is why compartmentation should be considered as part of an ongoing approach to building management.

A good survey should provide more than a list of defects. It should help you understand where the risks are, what needs to happen next and how the work can be delivered in a practical way.

At Assured Fire Safety Consultancy, we take a proportionate and pragmatic approach to compartmentation surveys, helping clients understand their buildings and prioritise actions based on risk. 

Because when you’re responsible for a large residential portfolio, the goal isn’t simply to produce another list of problems, it’s to create a clear, achievable plan for managing them.

Need a compartmentation survey?

Our team can help you assess, prioritise and plan compartmentation works across your residential portfolio, get in touch today.

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