Detection

Temporary fire detection system

Securing construction sites and temporary sites with appropriate fire detection systems

Construction, renovation, and remodelling sites pose a high fire risk: power tools, hot work, storage of flammable materials, and temporary electrical installations.

Conventional fire safety systems are often deactivated because they trigger false alarms due to construction work, or they are simply removed.

Temporary fire detection systems enable effective monitoring of construction sites throughout the duration of the project, using mobile, standalone, and interconnected equipment.

DEF designs and installs temporary systems that comply with safety requirements, drawing on the DEF Network’s recognised expertise in temporary fire protection for construction sites, to ensure the safety of people, the protection of property, and the continuity of operations.

How does a temporary fire detection system work?

The temporary fire detection system relies on a network of optical and/or thermal radio-controlled detectors mounted on telescopic booms to detect smoke at the earliest possible stage; these detectors are connected to an NF-certified Fire Detection System.

This system is based on the principles of conventional fire detection, but is designed to meet the specific requirements of construction sites: flexibility, energy self-sufficiency, and wireless communication.

The system consists of:

Smoke or heat detectors mounted on telescopic poles up to 11 meters long,
Mobile security control unit housed in a rugged, dust- and splash-resistant enclosure,
Radio transmission between the detectors and the control panel,
Alerts via text message, email, or phone call if a detection occurs,
Mains power supply with a backup battery that complies with regulatory requirements.

Alarms can be local (sirens, flashing lights) or remote, sent to a remote monitoring centre or a security control room.

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Quick and flexible installation

Temporary systems are designed to be installed in a matter of hours and adapted to changes on the construction site.
The detectors can be easily moved as the work progresses.
Every configuration is studied beforehand: number of detection points, radio range, conditions environnementales.

Integrated monitoring and maintenance

The control panels are equipped with a communication module that enables remote monitoring:

reporting of alarms and malfunctions,
The area, address, and directions to the alarm location
The control panel alerts you as soon as an anomaly is detected (battery issue, clogging, disconnection, loss of connection with a sensor, etc.)

This information ensures effective preventive maintenance and uninterrupted service throughout the duration of the project.

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Why install a temporary fire detection system?

Temporary detection provides a practical solution to the security requirements of project owners and contractors. A compelling selling point for insurance companies, construction site monitoring helps minimise risk and protect your investment

	Risk covered	Operational benefit
Quickly secure the construction site	No detection during construction	Set up in just a few hours, with no impact on business operations
Adapting to different work environments	Constant changes in high-risk areas	A mobile and flexible system that can be easily repositioned
Notify immediately	Late detection or not handled	Instant alert notifications (SMS/email), even remotely
Minimising construction downtime	Incident resulting in a business interruption	Reduction in operating losses and lead times
Ensure regulatory compliance	Failure to comply with safety requirements	Compliance with the requirements of the fire prevention plan and the fire permit

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A system supported by the Labour Code and prevention guidelines

Although there is no specific regulatory requirement mandating the installation of a temporary fire detection system on construction sites, several regulations govern fire prevention during construction work.

These provisions are intended to ensure the safety of workers, temporary installations, and buildings under construction or renovation, particularly during work that creates hot spots or is carried out concurrently with other activities.

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Construction site risk prevention plan

Labour Code – Article R4512-8
When multiple companies are working on the same construction site, it is mandatory to develop a prevention plan. This document identifies the risks associated with concurrent operations, particularly fire hazards, and outlines appropriate safety measures.
Article R4512-8
Hot spot work

Fire permit
Work that produces flames, sparks, or heat sources requires a fire permit. This regulation requires the implementation of preventive and monitoring measures to prevent fires from starting.
Hot work permit
Safety coordination on construction sites

Health and Safety Coordination
Regulations governing Health and Safety Coordination require the implementation of risk prevention measures on building and civil engineering construction sites. It calls for the identification of fire hazards and the implementation of appropriate measures.
SPS coordination
Recommendations from prevention guidelines

APSAD and CNPP
Prevention guidelines recommend installing temporary fire detection systems on construction sites or during work in occupied buildings, in order to quickly detect a fire in its early stages when there is no human supervision.
APSAD and CNPP

Key figures

These figures highlight the vulnerability of construction sites and the importance of reliable detection from the earliest stages of a project.

1
Construction site fires recorded in Paris and the inner suburbs

30
Percentage of fires caused by construction work, by hot spot

70
Businesses ceasing operations following a major disaster

8435
Average time required to install a temporary DEF system

Your sectors

Technology tailored to each of your constraints

Every sector has its own constraints, risk levels and regulatory requirements. DEF designs fire safety solutions that adapt to any environment, ensuring performance, compliance and business continuity.