Fire Alarm Installation in Cornwall — BS 5839 Compliant
A fire alarm that fails its insurance inspection costs you your cover. MC Fire and Security designs, installs, and maintains fire alarm systems for homes and businesses across Cornwall — every one installed to the latest British Standards (BS 5839-1:2025 commercial, BS 5839-6:2020 domestic), so you’re fully compliant from day one and your insurer has no grounds to refuse a claim.
A fire alarm system is the network of detectors, sounders, manual call points, and a control panel that detects fire and alerts everyone in a building. Commercial premises in the UK must install fire alarms to BS 5839-1, the standard for fire detection and alarm systems in non-domestic buildings — covering every aspect from detector placement to commissioning and 6-monthly servicing. Without a compliant system, you fail your Fire Risk Assessment, void your insurance, and put your occupants at risk.
If you run a shop, office, hotel, school, or industrial unit in Cornwall, you can't afford to get this wrong. Too often, we see untested decade-old systems, missing logbooks, or alarms that won't sound when they need to.
We fix that. You get a commissioned, documented, insurer-recognised system installed by Mitch personally — designed to the exact BS 5839 Category your building requires.
Types of Fire Alarm Systems We Install
Conventional fire alarm systems (BS 5839-1 Category L4/L5)
For small commercial premises and lower-risk areas. Cost-effective, zone-level detection. When an alarm triggers, the panel shows the zone, making it ideal for straightforward layouts.
Addressable fire alarm systems (BS 5839-1 Category L1/L2)
For larger commercial buildings, hotels, and care homes. Pinpoints the exact device that triggered. Required for buildings where life safety is critical and rapid identification is needed.
Wireless fire alarm systems
For listed buildings, retrofits, and properties where cabling is impractical. Battery-managed with the same compliance as wired systems, offering a clean, non-disruptive installation.
Domestic fire alarm systems (BS 5839-6)
For HMOs, holiday lets, and large dwellings. Grade-appropriate to the risk profile. Ensures you remain landlord-compliant and your tenants are protected.
Why a compliant fire alarm pays for itself
- Sleep easier knowing your premises is BS-compliant on day oneEvery install is commissioned and documented to BS 5839-1, ready for your insurer.
- Pass your Fire Risk Assessment without a callbackWe hand you a complete logbook, zone plan, and commissioning certificate before we leave.
- Protect your insurance policyNon-compliant alarms void cover. Our paperwork stops that conversation before it starts.
- Cut false alarm calloutsProperly designed detector placement avoids the cooking-fume / steam / dust false-trigger problem.
- Future-proof against the 2025 standard refreshBS 5839-1:2025 is in force; all our installs meet it.
How we install your fire alarm
Free site survey
Mitch visits, walks the building, identifies fire risks, asks about your insurance and your Fire Risk Assessment.
Design + quote
Within 48 hours you get a written quote with a zone plan and a Category designation (L1/L2/L4/L5/M).
Install
Typically 1-3 days for a small commercial unit. Daily clean-down, no overnight mess.
Commission + test
Every device tested, every zone walked, every sounder verified. We test the panel against the BS 5839-1 commissioning checklist.
Documentation + handover
You get the logbook, the zone plan, the commissioning certificate, and a 6-monthly service reminder set in our calendar.
Why Choose Us
Most fire fatalities happen in buildings without working alarms. According to the Home Office's 2024 Fire and Rescue Service statistics, 31% of all fatal dwelling fires in England occurred in properties where the smoke alarm was either absent or non-functioning. A maintained, compliant system isn't optional — it's the single biggest determinant of whether occupants survive.
Source: Home Office, Fire and Rescue Service statistics, 2024.
BFC member, not just "trained"
Independent verification of standards. Most Cornwall installers aren't.
Mitch installs every system himself
No subcontracting, no surprise team. The man who quotes, installs.
6-monthly service built in
Every install comes with a calendar reminder so your insurer never has a "non-maintained" conversation.
Local-only, Cornwall-only
Same-day quotes Helston to Bodmin, Penzance to St Ives.
About the engineer
Mitch Clementson — Founder + Engineer
Mitch has spent 16 years installing fire and security systems across Cornwall — from listed cottages in Helston to commercial premises in Truro. Every job he quotes, he installs. Every system he commissions, he services. There is no subcontracting, no surprise team, no "the engineer will be in touch" — you call, he answers.
- BS 5839-1:2025 — Commercial fire alarm design, installation, commissioning
- BS 5839-6 — Domestic fire alarm grading
- BS EN 62676 — CCTV system standards
- BS EN 50131 — Intruder alarm grading
- BS 5266-1 — Emergency lighting code of practice
- BS 5306-3 — Fire extinguisher commissioning and servicing
- British Fire Consortium member (independent standards verification)
"A fire alarm isn't a product. It's a system that has to work the day you need it. That's why I commission every panel myself, document every device against the BS 5839 zone plan, and hand you a logbook your insurer will recognise."
— Mitch Clementson, Founder of MC Fire & Security
What's included in your fire alarm install
- Site survey + Fire Risk Assessment cross-check — included.
- Documentation pack — zone plan, commissioning certificate, logbook, user training.
- 12-month workmanship warranty — plus the manufacturer hardware warranty.
- First 6-monthly service — calendar reminder set so you stay compliant.
Every quote is itemised — you see exactly what you're paying for. Same-day quotes across Cornwall. No surprises, no hidden extras.
Recent Work
What Our Customers Say
5.0 Google rating from 36 reviews. Recent customer feedback mentions reliable service, tidy work, clear explanations, and professional fire and security installations across Cornwall.
View verified Google reviewsFrequently Asked Questions
How much does a fire alarm system cost in the UK?
Fire alarm costs vary depending on the type of system, the size of your property, and the level of protection needed. A basic conventional system for a small commercial unit might start from a few hundred pounds, while a full addressable system for a larger building will be more. Mitch provides free site surveys and no-obligation quotes - call 07498 819185 to get an accurate price for your property.
Do I need a fire alarm system for my business?
Yes. Under the Regulatory Reform (Fire Safety) Order 2005, the "responsible person" (usually the business owner or employer) must carry out a fire risk assessment and ensure appropriate fire detection is in place. For most commercial premises in Cornwall, that means a professionally installed fire alarm system. Mitch can assess your requirements with a free site survey.
What is BS 5839 and why does it matter?
BS 5839 is the British Standard that sets out the requirements for fire detection and alarm systems. Part 1 covers commercial buildings, and Part 6 covers domestic properties. Having a system installed to BS 5839 means it meets the recognised standard for design, installation, and maintenance - which matters for insurance, legal compliance, and most importantly, keeping people safe.
What is the difference between a conventional and addressable fire alarm?
A conventional system divides your building into zones - when a detector triggers, the panel shows which zone is affected. An addressable system gives each detector its own unique address, so the panel tells you the exact device that's activated. Addressable is better for larger or more complex buildings. Mitch will recommend the right type during your free site survey.
How long does it take to install a fire alarm system?
A straightforward domestic system can usually be installed in a day. Commercial installations vary depending on the building size and system complexity - anything from one day for a small shop to several days for a multi-storey building. Mitch will give you a clear timeline during the site survey.
Do I need a fire alarm certificate after installation?
Yes. After installation and commissioning, MC Fire and Security provides a certificate confirming the system has been installed and tested to the relevant BS 5839 standard. This certificate is important for insurance purposes and demonstrates compliance if inspected by the fire authority.
What are the different categories of fire alarm system (L1-L5, M, P1-P2)?
BS 5839 defines categories based on the level of protection. L1 is full coverage of the entire building, L2 covers escape routes plus high-risk rooms, L3 covers escape routes only, and L5 is bespoke to a specific fire risk assessment. P1 and P2 relate to property protection rather than life safety, and M is a manual-only system with call points but no automatic detectors.
Do wireless fire alarms meet British Standards?
Yes. Modern wireless fire alarm systems are fully compliant with BS 5839 when properly installed. They're ideal for listed buildings, older Cornish properties with stone walls, or sites where cabling would be impractical or too disruptive. MC Fire and Security installs wireless systems that meet the same standards as wired.
What changed in BS 5839-1:2025?
The 2025 update to BS 5839-1 brought several changes to the commercial fire alarm standard, including updated guidance on system design, detector placement, and integration with other fire safety systems. MC Fire and Security stays current with all British Standard revisions - every system Mitch installs meets the latest requirements.
Do all commercial buildings need a fire alarm?
Most commercial buildings require some form of fire detection, but the type depends on the building's use, size, and fire risk assessment. Some very small, simple premises might only need manual call points, while others need full automatic detection throughout. The responsible person must ensure adequate provision. Call Mitch on 07498 819185 for a free site survey to find out exactly what your building needs.
What fire alarm do I need for an HMO?
HMOs have specific requirements under BS 5839-6:2020. The grade and category depend on the property's size, number of storeys, and conversion type. Most HMOs in Cornwall need at least a Grade D, LD2 system - mains-powered, interconnected detectors covering escape routes and high-risk rooms. Mitch has fitted HMO fire alarm systems across Cornwall and can advise exactly what your property needs.
Can I upgrade my existing fire alarm system?
In most cases, yes. If your current system is outdated, doesn't meet current standards, or the panel has reached end of life, MC Fire and Security can upgrade or replace it. Sometimes it's a panel swap and additional detectors; other times a full new system makes more sense. Mitch will assess what you've got and recommend the most cost-effective route forward. Call 07498 819185 for a free assessment.
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Ready to protect your property? Call Mitch on 07498 819185 or send a message on WhatsApp.
Last updated: 2026-05-13