What is BS 8524? – UK Standard for Active Fire Curtain Barrier Assemblies

Fire curtains are frequently used where traditional fire doors are impractical — such as large atria, open-plan commercial spaces, voids above stairways, and other areas where flexible compartmentation is needed. These systems must not only resist fire and smoke; they must also deploy reliably when needed, integrate with fire alarm systems, and be maintained correctly over time.

BS 8524 is important because it:

• Provides specific, purpose-built test methods for fire curtains, including real-world operational testing.
• Includes codes of practice for installation and maintenance — recognising these systems are lifecycle products, not one-off installations.
• Helps designers, fire engineers, installers, and duty holders select systems with known and verified performance.

BS 8524 sets rigorous requirements beyond simple fire resistance:

• Fire and smoke performance — Fire curtain assemblies must resist flame penetration and reduce smoke spread under controlled test conditions.
• Operational durability — Components such as motors, controls, and drive systems are tested through repeated cycles to show long-term reliability.
• Control systems and fail-safe behaviour — Curtains must integrate with alarms and power systems and deploy reliably even during power loss.

Performance is typically expressed using familiar fire classification codes (e.g., E, EW, Sa), mirroring related fire-resistance and smoke-control categories — but always within the context of the tested assembly.

A key strength of BS 8524 is its focus on ongoing performance once a system is installed. Part 2 includes:

• Correct installation practices – ensuring the assembly installed on site matches what was tested in the lab.
• Commissioning procedures – including checks of devices, controls, and integration with fire alarm and detection systems.
• Maintenance guidance – periodic functional checks, inspection for obstructions, and verification of key components to maintain performance over time.

These aspects are essential because a tested design only performs as intended if installed and maintained correctly.

While other standards like BS EN 16034 also relate to fire resisting products (including some types of doorsets and curtains), BS 8524 is unique in how it:

• Focuses specifically on active fire curtain systems.
• Includes more stringent operational and durability testing than generic fire resistance standards.
• Specifies non-fire tests (e.g., operational reliability, motor performance, control integration) required for real-world performance.

In practice, many design teams specify compliance with both standards where appropriate (e.g., BS EN 16034 for CE/UKCA marking and BS 8524 for performance assurance).

Typical scenarios where BS 8524-compliant fire curtain systems are specified include:

• Open plan commercial offices and retail environments
• Large atria and open voids
• Lift lobbies, stairwells, and protected escape routes
• Buildings requiring flexible compartmentation without fixed walls or doors

These applications often need a fire protection solution that deploys automatically, doesn’t disrupt daily use, but provides effective smoke and fire separation on demand.

Although standards like BS 8524 describe performance requirements, compliance in the UK typically involves:

• Third-party certification – independent verification that products have been tested and meet the standard’s requirements.
• Product documentation – detailed test reports and classification evidence to support specification and building control approval.

Because BS 8524 has undergone recent revision (2025 versions published), it’s important to confirm the edition and certification route when specifying or procuring fire curtains.

For those responsible for fire safety in buildings — including architects, fire engineers, facilities managers, and contractors — BS 8524:

• Provides confidence that a fire curtain will perform reliably when needed.
• Supports compliance with fire strategy requirements and building control expectations.
• Encourages good practice through lifecycle management — not just a one-off purchase.

If you’re doing building work, compliance is generally demonstrated using Building Regulations guidance (for England, Approved Document B).

When procuring or recommending a fire curtain system, ensure that:

• The system has BS 8524-1 performance certification.
• The supplier follows BS 8524-2 code of practice for installation and maintenance.
• All documentation (test reports, certificates, classifications) is current and from a reputable third-party certification body.