Collaborative Reporting for Safer Structures (CROSS-UK) has raised serious concerns over incidents where Automatic Opening Vents (AOVs) have been rendered inoperable during building works, such as cladding replacement or façade remediation projects. These reports highlight the need for greater awareness and stricter controls to protect vital fire safety systems during construction activities.

AOVs are an essential component of a building’s fire safety strategy, designed to vent smoke and improve visibility for evacuation during emergencies. However, their design often mimics standard windows, which can lead contractors to overlook their critical function. CROSS-UK reports provide alarming examples. Safety Report 1347 outlines two cases where AOVs were rendered non-functional. In one instance, contractors disconnected AOVs from electrical components during cladding remediation. In another, cladding was improperly screwed into AOV frames, disabling them for months. Safety Report 1380 describes an incident where AOVs were masked during façade works. Operatives applied render to the building’s exterior and covered the vents to protect them, inadvertently preventing their operation in the event of a fire.

Fire Risk Assessment Crucial

These incidents underline the importance of reviewing and updating fire risk assessments during construction work. Those responsible for fire safety must address increased fire risks, particularly when combustible materials are exposed during remediation. Interim measures should be implemented to mitigate risks, including adjustments to evacuation strategies, and assessments must be made to determine whether the building remains safe to occupy if risks cannot be fully controlled.

For example, evacuation strategies like “Stay Put” may need to be revised during construction work, and interim measures implemented to ensure occupant safety. Where risks cannot be mitigated, decisions may be required about the building’s continued occupation.

Read the full article here. 

For more updates, expert insights, and guidance on fire safety, sign up to the FIA newsletter today.