How Often Should a Fire Alarm Be Serviced?
A guide to BS 5839 fire alarm maintenance requirements for homes and commercial premises — and what happens if you skip it.
Regular fire alarm servicing is one of those things that's easy to put off — until something goes wrong. Here's what you actually need to do, how often, and why it matters.
The Short Answer
According to BS 5839 — the British Standard for fire detection and alarm systems:
- •Domestic properties: minimum one professional service visit per year
- •Commercial premises: minimum two professional service visits per year (every six months)
- •All premises: weekly testing by a responsible person on site
What Happens During a Service Visit?
A proper fire alarm service is more thorough than simply pressing the test button. A qualified engineer should check:
- •Control panel and power supplies (mains and battery backup)
- •All smoke and heat detectors — tested individually for response
- •Manual call points throughout the building
- •Fire beam detectors — tested and realigned if needed
- •Sounders and visual alarm devices
- •All relays and links checked for correct operation
- •Battery condition and replacement where necessary
- •System fault log reviewed and cleared
At the end of every visit, you should receive a written service report and — for commercial premises — a BS5839 inspection certificate documenting all tests carried out and any remedial work needed.
Is Fire Alarm Maintenance a Legal Requirement?
For most commercial premises, yes. The Regulatory Reform (Fire Safety) Order 2005 places a legal duty on the 'responsible person' — typically the business owner or employer — to ensure fire detection and warning systems are properly maintained.
Failure to maintain your fire alarm system can result in:
- ⚠Enforcement notices from the fire authority
- ⚠Fines and, in serious cases, prosecution
- ⚠Invalidated insurance claims following a fire
- ⚠Personal liability if occupants are harmed
What About Domestic Properties?
While there's no specific statutory requirement for annual fire alarm servicing in private homes, it's strongly recommended — and required in HMOs (Houses in Multiple Occupation). Many home insurance policies also require evidence of maintained fire alarm systems.
At a minimum, homeowners should test their smoke alarms weekly using the test button and replace batteries annually (or install 10-year sealed battery alarms).
How to Choose a Maintenance Provider
Look for an engineer or company that:
- ✓Issues a proper BS5839 inspection certificate after every visit
- ✓Tests every detector and component individually — not just the panel
- ✓Provides a written service report with any remedial actions noted
- ✓Has experience with your specific system type and manufacturer
- ✓Offers a planned maintenance contract with priority call-out response
Need a Fire Alarm Service in London?
Fortech Group provides BS 5839 compliant fire alarm maintenance for homes and commercial premises across London. We issue full inspection certificates and maintain systems installed by any company.