BS 5839 is the British Standard for the design, install, commissioning and maintenance of fire detection and alarm systems in non-domestic premises. Part 1 covers commercial buildings (offices, retail, hospitality, industrial), Part 6 covers houses in multiple occupation (HMOs) and dwellings. The standard prescribes detection categories (L1-L5 for life safety, P1-P2 for property protection, M for manual-only) — your fire risk assessor specifies the right category based on the building's use, occupants, and fire risk.
Issued by
British Standards Institution (BSI).
Why it matters
Almost every UK commercial premises is required to have a BS 5839-compliant fire alarm system, signed off by a competent installer. Insurers and the Fire and Rescue Service expect documentation that ties the install to a current Fire Risk Assessment. Non-compliance can invalidate buildings insurance and trigger enforcement.
Questions to ask a provider
- What BS 5839 category is specified by my Fire Risk Assessment?
- Are you BAFE SP203-1 certified for fire alarm install?
- What's the maintenance interval required for ongoing compliance?
Related terms
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