Fire safety cannot be verified at the final inspection alone

Gateway 3, the final regulatory checkpoint before completion certification, has changed how fire safety is demonstrated on higher-risk buildings (HRBs). Dutyholders must show that building work complies with the relevant regulations, supported by robust evidence gathered throughout construction. Meeting this requirement demands accurate information, technical guidance and processes that help verify installation quality, ensuring design intent has been translated into reality.

Correct installation of passive fire protection is critical to ensuring it performs as expected. Even rigorously tested products may fail to meet the project’s fire safety requirements if they are not installed according to the manufacturer’s guidance. This could delay Gateway 3 approval, triggering costly remedial works. More seriously, inadequate installation can undermine compartmentation, allowing fire and smoke to spread beyond the assumptions of the building’s fire strategy, with potentially severe consequences for life safety.

The principal contractor has a duty to plan, manage and monitor building work, including ensuring that those undertaking safety-critical installations are competent and appropriately supervised. Competence can be supported by certification through independent schemes and adherence to industry frameworks, such as the Association for Specialist Fire Protection’s (ASFP) Competence Framework. However, it is important to establish whether certification applies to an individual or a business. Product-specific manufacturer training can provide further technical and practical knowledge.

Beyond having competent people in place, project teams must also demonstrate that this competence has been consistently applied throughout construction.

Final building control inspections play an important role in verifying compliance, but by this stage, many safety-critical elements, including cavity barriers and firestops, are concealed behind the facade or within the building fabric. While sections can be opened up for inspection, this is impractical on a large scale and provides only limited assurance of installation quality across an entire building.

Capturing evidence progressively throughout construction is therefore essential. Photographic records, inspection reports and documented quality checks can create a clear, auditable record of work undertaken. Independent technical review can further strengthen this evidence, helping identify potential issues before installations are concealed.

One way project teams can achieve this is through manufacturer-led installation inspection services. With detailed knowledge of how their systems have been tested and assessed, manufacturers can identify deviations that may affect performance but otherwise go unnoticed during routine quality checks.

While some projects require regular in-person inspections, digital technologies can help streamline the process. Specialist inspection applications allow installers to capture photographs and key project information, creating structured reports for review by technical teams. This can help identify issues early, reduce repeated installation errors and minimise remedial work.

Such support is particularly valuable on large or complex projects involving multiple contractors, interfaces and programme pressures. However, digital inspection tools should complement rather than replace appropriate on-site inspections, providing an additional means of checking work and sharing progress with the wider project team.

Beyond having competent people in place, project teams must also demonstrate that this competence has been consistently applied throughout construction

Another challenge at Gateway 3 is demonstrating that changes made during construction have been appropriately controlled and do not compromise the approved fire strategy.

On complex projects, design development and site constraints can lead to alterations in products, interfaces or installation methods. While some changes may appear minor, their implications for fire safety must be assessed and documented, with regulatory notification or approval obtained where required.

This is particularly relevant to passive fire protection, where performance often depends on the interaction between multiple components. A seemingly minor change to a substrate, cavity width, fixing arrangement or adjacent construction detail may affect whether an installation remains consistent with tested evidence and manufacturer recommendations.

Without appropriate records, project teams may struggle to demonstrate that changes have been properly assessed and managed when preparing a Gateway 3 submission.

Regular inspections and ongoing engagement with manufacturers can support effective change control. Where site conditions differ from the original design assumptions, manufacturers may provide technical guidance, identify suitable tested solutions or highlight where further assessment is necessary. Recording this engagement helps establish an auditable trail of decisions informed by competent technical advice.

Inspection reports and installation records also contribute to the golden thread of building information, supporting completion certificate applications and demonstrating how the completed construction aligns with the approved design. Where changes have been necessary, evidence of technical assessments and manufacturer input can help show how these were considered and managed.

Importantly, these records retain their value beyond Gateway 3. Accurate information about what has been installed, where it is located and how its performance was verified can inform future maintenance, refurbishment and fire risk assessments, helping those responsible for managing the building understand its passive fire protection measures.

The benefits of inspection services can also extend beyond individual projects. By analysing recurring issues identified through inspections, manufacturers can provide contractors with feedback that informs additional training, technical guidance or targeted site support. This creates opportunities for continuous improvement and better installation practices across future projects.

As building safety requirements become more rigorous, manufacturer support should be viewed as more than a supplementary service. Training, technical guidance, site inspections and digital tools can all help construction professionals establish a stronger evidence base and maintain consistent quality assurance.

Ultimately, demonstrating compliance at Gateway 3 should not be treated as an exercise undertaken at the end of construction. It depends on decisions, checks and records made throughout the project, ensuring that passive fire protection is not only correctly specified but properly installed, verified and documented.