The 2025 update to BS 5839-1 introduces additional clarity around fire-alarm design documentation, system categories, and handover responsibilities.

It aims to ensure consistent, traceable standards from design through to commissioning.

System Categories and Coverage

Designers must specify system categories (L1–L5, P1–P2, M) with supporting drawings showing detector locations and alarm zones.

These must be retained for the lifetime of the system and shared with the end user upon completion.

Design Documentation

Clause 6 highlights that all design, installation, commissioning and verification certificates must be handed over together.

Missing documentation can now be treated as a compliance failure.

Walker Fire ensures full certification and design transparency with every fire-alarm installation.

Competence and Certification

Design and installation work should be performed by competent persons under third-party certification schemes such as BAFE SP203-1.

This formal competence is now a key expectation in BS 5839-1 : 2025.

Handover and Maintenance Link

Designers and installers are now expected to provide clear maintenance instructions and schedules.

This improves system reliability and simplifies long-term servicing in line with the new standard.

In Summary

BS 5839-1 : 2025 places greater emphasis on documentation, competency and traceability.

By partnering with Walker Fire, you gain a certified design-to-installation process that meets the latest British Standard and supports lifetime compliance.