+44 7877 835249 · sales@jtfiretech.co.uk · London & South East · Mon–Sat: 8:00am–5:00pm · 24/7 Emergency
Fire Alarm Systems
BS 5839-1 compliant fire alarm design, installation, commissioning, and maintenance — tailored to your building from day one.
BAFE SP203-1 & SSAIB Certified
Third-party certified fire alarm specialists
Our FIA-qualified engineers design and install fire alarm systems that meet BS 5839-1 in full — correctly specified, properly installed, and maintained to the standard your building legally requires.
Comprehensive Fire Alarm Solutions to BS 5839-1
A fire alarm system is only as reliable as the people who designed, installed, and maintain it. At JT Fire and Electrical Solutions, we deliver end-to-end fire alarm services — from initial risk-based design through to commissioning, routine maintenance, fault response, and certification.
Every system we deliver is fully compliant with BS 5839-1:2017, designed around your specific building, occupancy type, and fire risk — not a generic template. With direct manufacturer accounts, LPS 1014 accredited installation, and 24/7 emergency support, we cover every stage of your fire alarm system so you are protected, compliant, and confident.
BS 5839-1 Compliant
Third-party certified to SP203-1. Every installation meets the standard, not just on paper.
24/7 Monitoring
Optional connection to Alarm Receiving Centres for round-the-clock protection and verified response.
Maintained to Standard
Planned servicing, fault response, and full certification records so your system stays compliant year after year.
Our Fire Alarm Services Include
- Risk-based system design to BS 5839-1 — Category L1 to L5 and P1 to P2
- System zoning, cause and effect strategy, and equipment specification
- Installation of addressable and conventional systems using fire-resistant cabling
- Device installation — detectors, manual call points, sounders, and interfaces
- Full commissioning, programming, functional testing, and cause and effect verification
- Client handover, demonstration, and full certification documentation
- Weekly, monthly, and quarterly inspection and testing
- Planned preventative maintenance — quarterly and bi-annual servicing
- Battery testing, detector cleaning, and system health checks
- Fault finding, diagnosis, and emergency repair callouts
- System upgrades, extensions, and compliance updates to current standards
- Cause and effect programming — phased evacuation, HVAC, lift, and door interfaces
- Integration with fire suppression, access control, BMS, and smoke ventilation systems
- Emergency lighting integration to BS 5266
- Full certification suite — design, installation, commissioning, and maintenance records
BS 5839-1 System Categories
Category L — Life Protection Systems
Life protection systems are designed to provide early warning and maximise the time available for safe evacuation.
- L1 — Automatic detectors throughout the entire building for maximum protection
- L2 — Detectors in defined areas plus escape routes and high-risk zones
- L3 — Protection of escape routes only, ensuring corridors and stairwells are covered
- L4 — Detection within rooms or areas that open directly onto escape routes
- L5 — Localised protection of a specific area or risk only
Category P — Property Protection Systems
Property protection systems are designed to detect fire at the earliest possible stage, minimising damage to the building and its contents.
- P1 — Automatic detectors throughout the entire building for maximum property protection
- P2 — Automatic detectors in defined areas of higher risk or higher value
Category M — Manual Systems
Manual call point only systems, typically used in conjunction with automatic detection as part of a wider fire strategy or in lower-risk environments.
Ensure Your Fire Alarm is Compliant and Ready
BAFE SP203-1 certified fire alarm services — design, installation, and maintenance by experienced professionals.