Ajax-Certified Installers · BS EN 50131 Graded Systems
Intruder Alarm Installation in London
Slam Systems installs professional intruder alarm and burglar alarm systems for homes and businesses across London, Middlesex, Surrey, Kent, and Buckinghamshire. As certified Ajax Systems installers, we deliver reliable, wireless-first alarm solutions that meet BS EN 50131 standards, protecting your property, your people, and your assets.
Every intruder alarm installation is carried out by our own in-house engineers, we never use subcontractors. We offer free site surveys, graded alarm systems suitable for insurance compliance, and optional 24/7 professional monitoring with police and keyholder response.
Ajax Wireless Alarm Systems
We are certified Ajax Systems installers. Ajax alarms are wireless, tamper-proof, and communicate simultaneously via Ethernet, 2G/3G/4G, and Wi-Fi for maximum reliability. The Ajax app delivers instant push alerts and full remote control from your smartphone.
Graded Alarm Systems
We install graded intruder alarm systems (Grade 1, 2, and 3) meeting BS EN 50131 standards, suitable for insurance requirements, police response applications, and high-value commercial premises across London.
24/7 Professional Monitoring
Our alarm systems can be connected to a professional alarm receiving centre (ARC) that responds 24 hours a day, seven days a week, alerting keyholders, dispatching a security response, or notifying the police when required.
Residential & Commercial
From a single-property home alarm to a multi-site commercial system, we design solutions scaled to your property's layout, risk level, and budget, with the option to integrate with CCTV and access control.
Types of Intruder Alarm Systems
- 01
Monitored vs. Unmonitored (Bells-Only) Alarms
A bells-only alarm sounds a siren when triggered and relies on someone nearby to act. A monitored alarm is connected to a 24/7 alarm receiving centre that alerts keyholders, dispatches a response, or notifies police. For commercial premises and insurance compliance, a monitored system is strongly recommended.
- 02
Wireless vs. Wired Intruder Alarms
Wireless alarm systems (such as Ajax) require no detector cabling, making installation faster and less disruptive, ideal for occupied offices, residential properties, and listed buildings. Wired systems remain suitable for large commercial installations where infrastructure allows. Both meet BS EN 50131 standards.
- 03
Grade 1, 2 & 3 Alarm Systems
BS EN 50131 grades reflect the level of risk a system is designed to counter. Grade 1 is for low-risk residential use. Grade 2 is required by most commercial insurers. Grade 3 is specified for high-value targets such as jewellers, pharmacies, and data centres. We will specify the correct grade during your free site survey.
What's Included in Our Intruder Alarm Installations
- Free site survey, risk assessment, zone planning, and written specification at no charge
- Motion detectors, door/window contacts, shock sensors, and sirens, all hardware included and configured to your layout
- Smartphone app control with instant push notifications and remote arm/disarm
- Integration with existing CCTV and access control systems where required
- Annual servicing and maintenance contracts available after installation
London Areas We Cover for Intruder Alarm Installation
We install intruder and burglar alarm systems across all London boroughs and surrounding counties. Our Ajax-certified engineers cover Central London, the City, Canary Wharf, South London, East London, West London, and North London, as well as Surrey, Kent, Buckinghamshire, and Middlesex.
Areas served include: Westminster, Kensington & Chelsea, Hammersmith & Fulham, Wandsworth, Lambeth, Southwark, Greenwich, Tower Hamlets, Hackney, Islington, Camden, Haringey, Barnet, Ealing, Hounslow, Richmond, Kingston upon Thames, Merton, Sutton, Croydon, Bromley, Bexley, Havering, Redbridge, Waltham Forest, Enfield, Harrow, Hillingdon, Brent, Newham, and Lewisham.
Intruder Alarm FAQs
What grade of intruder alarm do I need for my London business?
Grade 2 is required by most commercial insurers and is appropriate for the majority of London businesses. Grade 3 is specified for high-value targets such as jewellers, pharmacies, and data centres. We advise on the correct grade during your free site survey.
What is the difference between a monitored and unmonitored alarm?
A bells-only alarm sounds a siren and relies on someone nearby to act. A monitored alarm connects to a 24/7 alarm receiving centre that alerts keyholders and dispatches a response. For commercial premises and insurance compliance, a monitored system is strongly recommended.
Do I need a specific alarm for my business insurance in London?
Many commercial insurance policies require a monitored alarm meeting BS EN 50131 to qualify for cover or achieve lower premiums. Some policies specify a Grade 2 or Grade 3 system. We recommend checking your policy wording, we will help you meet the required specification.
How long does intruder alarm installation take?
A standard residential or small commercial installation is typically completed in a single day. Larger commercial premises may take 2–3 days. Ajax wireless systems are faster to install than wired alternatives as they require no detector cabling, reducing disruption to your property.
Are wireless intruder alarms as reliable as wired systems?
Yes, modern wireless systems like Ajax are highly reliable for professional installations. Ajax devices communicate via multiple channels simultaneously (Ethernet, 4G, and Wi-Fi), are tamper-proof, include battery backup, and are tested to the same BS EN 50131 standards as wired systems.
Can a burglar alarm integrate with CCTV and access control?
Yes. We specialise in integrated security. Your alarm can trigger CCTV recordings automatically and integrate with access control to automate arm/disarm, reducing false alarms and creating a unified security platform for your London premises.