Our Fire Alarm System Installation Process

A well-planned fire alarm system installation is essential for keeping people safe and meeting your legal responsibilities. When every stage is carried out correctly, your system will perform reliably and support compliance with the Regulatory Reform (Fire Safety) Order 2005.

At Bolt, we follow a clear, structured process that meets the relevant parts of BS 5839 regulations and reflects more than 15 years of industry experience. This guide explains each step of our fire alarm installation service process so you know exactly what to expect when working with our team.

 

Why a structured installation process matters

A fire alarm system is only as reliable as the process used to design, install and commission it. A rushed or poorly managed installation can cause false alarms, system downtime, unnecessary callouts and issues with insurance or building control.

Our process ensures every stage is completed to a high standard with full consideration of your building layout, your operations and your fire strategy, as well as all current UK regulations and legislation.

 

1. Site survey and consultation

Every project begins with a detailed survey of your building. We assess the layout of your premises, as well as any existing fire safety measures in place. We then review your fire risk assessment and consult the Responsible Person to understand site access, operational restrictions and any high-risk or sensitive areas.

This stage allows us to identify what is required to achieve full coverage and compliance. It also helps us highlight any non-conformities or potential challenges early in the project.

Typical outputs from this stage include:

• Recommendations for system coverage and category
• Initial device locations and cable routing considerations
• Identification of access limitations or operational constraints
• Preliminary advice on temporary measures during installation

This groundwork sets the foundation for a compliant system design.

 

2. Fire alarm design

Our design engineers create a system tailored to your building and its fire risk profile. The design follows the requirements of BS 5839 pt 1 for non-domestic premises and uses the fire risk assessment as a guide to determine suitable system category, such as L,1, L2, L3, L4 or L5.

We draw on experience from similar buildings and industries to ensure the design is both practical and robust. The completed design includes:

• Scaled drawings showing device locations
• Equipment schedules
• System calculations
• Notes that define coverage and performance expectations

This design acts as a technical blueprint for the installation stage.

 

Understanding fire alarm categories

BS 5839 defines categories to ensure the system matches the building’s risk and layout.

L1 provides the highest level of life protection with detectors installed throughout all areas. L2 systems cover escape routes and relevant high-risk rooms only, while L3 systems cover escape routes and adjoining rooms but exclude high-risk rooms. L4 systems provide detection on escape routes only, and L5 systems are bespoke solutions designed to meet specific building risks or fire risk assessor recommendations.

We will advise you on the correct category for your building.

 

3. Fire alarm installation

The installation is carried out by our trained Bolt engineers who take the time to understand your site and how to work safely within it. We use the right PPE tools and installation methods for each environment, whether we are working in a live office, a warehouse or a complex manufacturing space.

We plan the work in clear stages, like first fix and second fix, so we can coordinate smoothly with other trades and avoid holding up the wider project. This level of organisation often helps building control complete their inspections sooner.

There may be times when parts of the system need to go offline during the installation. If this does happen, we will explain temporary measures to put in place, such as simple walkaround checks. This keeps you compliant and helps meet insurance expectations.

A well-planned installation reduces disruption improves reliability and sets the system up for accurate commissioning.

 

4. Commissioning

Commissioning is the stage where we make sure the system has been installed correctly and works exactly as it should. Our commissioning team handles this, so the checks stay completely independent from the installation work.

During commissioning, we carry out:

• Functional testing of every device
• Sensitivity checks where needed
• Verification of cause and effect programming
• Testing of interfaces like door releases or suppression links
• Loop and battery calculations
• Checks to confirm the system matches the approved design

We also complete all fire alarm control panel checks and make sure the panel is displaying accurate information in line with BS 5839.

We only move to handover once everything meets the required standard and the system is performing as expected.

 

5. Certification and handover

Once the installation and commissioning stages are complete, you will receive a full documentation pack which includes:

• Design certification
• Installation certification
• Commissioning documents
• As fitted drawings
• Equipment data sheets
• Test results
• Zone charts branded for emergency services

These documents will give you clear proof of compliance and are important for building control insurers and anyone who maintains the system in the future.

We also walk you through how the system works, so you know how to carry out weekly tests, handle basic checks and understand what to do if a fault or alarm occurs.

 

6. Ongoing maintenance

Our own fire alarm maintenance packages cover routine servicing every six months or within the five to seven-month window allowed by the latest guidance. We also offer 24-hour callout support for clients who need ongoing cover.

Regular maintenance keeps the system compliant, reduces false alarms, diagnoses alarm issues and helps the equipment stay reliable throughout its life cycle.

 

Common issues we identify during surveys

During surveys, we often find problems that have been overlooked by building owners or previous contractors. Some of the most common issues include:

• Devices positioned incorrectly
• Damaged or unsuitable cabling
• Obsolete or incompatible control panels
• Insufficient coverage after layout changes or refurbishments
• Unrecorded alterations that impact system performance

Spotting these issues early prevents costly false alarms and helps you plan any upgrades before they become a problem.

 

Coordinating with other contractors

Many installations take place alongside wider refurbishment or construction work. We work closely with electrical contractors, facility managers, builders and other trades to avoid clashes and keep everything moving in the right direction.

Our team is used to working on busy sites where several stages depend on the fire alarm installation being completed on time. Because we plan our work carefully and communicate clearly, we are often ahead of the programme rather than holding it up. This means follow-on tasks such as ceiling closures, decoration, containment works or building control inspections can go ahead without delay.

We map out first fix and second fix dates early, share our requirements with other trades and adapt our schedule if something changes on site. This proactive approach helps each stage run smoothly and is one of the reasons Bolt is trusted on more complex projects.

 

How to get started

If you are planning a new fire alarm installation or replacing an existing system, our team will guide you from the first survey right through to full certification. We take the time to understand your building and how it operates so we can install a reliable, compliant system with as little disruption as possible.

Speak to our team to arrange a site survey or request a proposal.