Construction Site Security: Fire and Flood Mitigation

When considering construction site security, the mind first goes to threats posed by intruders, theft, and anti-social behaviour. However, effective risk mitigation extends far beyond preventing and managing these issues.

An undetected fire, for instance, has the potential to devastate a project within a matter of minutes. A burst pipe or flood can be costly and halt progress for weeks.

Fire and flood are significant threats that have a direct influence on construction sites, capable of causing severe losses, disrupting operations, and causing significant delays and reputational decline.

Insurers Allianz found that fire is the leading cause of financial loss in construction insurance claims, accounting for 27% of total losses globally. Allianz further report that over 75% of construction managers experienced construction delays linked to extreme weather events such as flooding, heavy rainfall, and storms.

This article will identify why both fire and flood can occur on construction sites, what the true cost of these issues can be if not mitigated, and how they can be prevented or managed.

A building site presents an inherently high-risk environment. Comprising of temporary infrastructure, alongside flammable and hazardous materials, dynamic site layouts, and periods of extended unoccupancy, the construction site presents an environment in which incidents can and do occur with noted severity.

Fire risks can be prevalent due to hot works. These are activities on site that introduce ignition sources, such as welding or soldering. With a high-risk of combustion when just a single spark meets a flammable material, hot works are subject to a permit that is issued before work can begin. The permit ensures mandatory checks can be completed in anticipation of the works.

Fire can also develop rapidly due to the presence of combustible materials on site. Whether it’s a timber frame for a housebuilding project or a skip holding flammables like packaging materials or leftover chemicals, the construction environment is laden with potential fire dangers. A lack of oversight of the premises - a risk factor when sites are not protected overnight or secure during holiday hours - can further increase the risk of spreading fire.

Flooding presents an equally challenging - though less complex - threat to construction sites. Burst pipes, insufficient drainage, water ingress, and heavy rainfall can all contribute to considerable damage on site. The most unpredictable of environmental risks, flooding presents an annual challenge on UK sites owing to the unpredictable nature of weather patterns.

The common thread between both fire and flood is that both threats can rapidly escalate due to limited oversight and supervision. As these risks are characterised by an initial incident which spreads and causes greater damage over time, the earlier they are identified and stopped the better.

Fire and flood risks can pose considerable damage to your construction site. The true cost however extends far beyond physical damage. The most immediate consequence of a major incident are the delays that a project can be subject to. Delays are incurred due to the need to assess damage, clean up the project, and repair any work that has been undone.

Delay has a knock-on effect on the financial viability of a project, coming hand in hand with disruption due to work stoppages and reduced productivity. As a result, idle labour costs, necessary overtime, or additional employees may be needed to ensure projects are completed on time.

Financial loss can also be incurred as plant or equipment such as machinery and tools may need to be repaired or replaced. Materials stored on site can also be destroyed and are necessary to replace.

The health and safety risks created by a fire or flood incident cannot be underestimated, with Construction (Design and Management) Regulations 2015 requiring health and safety risks on a construction project to be assessed and managed. Smoke and toxic exposure caused by fire or the soot, ash, and residue post-fire can require specialist remediation to remove contaminants before works can continue, while fire-damaged electrical systems or machinery can remain unsafe with a risk of shock.

Flooding can increase the potential for slips, trips, and falls on waterlogged surfaces, while electrical systems exposed to water can create a risk of electrocution. Floodwater can carry contaminants, such as raw sewage and toxic chemicals. To ensure the building site is a safe workplace in the wake of an incident, remediation will be required before workers return.

Insurance is a major consideration. Following a severe fire or flood incident, long-term costs like insurance premiums may rise, while insurers may implement conditions on cover afforded to future projects due to the perceived risks. Claiming in the event of an incident is also a time-consuming, complex process. Necessary documentation may have been lost in the incident, while liability for the incident may not be fully understood.

Contractually, fire and flood can pose difficulties. Missed deadlines can trigger liquidated damages, financial penalties for missed milestones, or create disputes with contractors. Often the financial loss associated with these secondary costs will far outweigh the direct costs of the incident.

Delays, disruption, or breaking the terms of a contract can all ultimately damage client confidence, and the trust of stakeholders. While it may only be a single site that suffers, the impact of such incidents will extend beyond that and is likely to affect future opportunities or the perceptions of your risk management abilities.

Effective fire and flood mitigation begins long before an incident is at risk of occurring. The planning stage and the site security risk assessment will play a critical role in reducing the potential for incidents.

During the site planning stage, flooding should take precedence with consideration for the geography of the project, drainage, and the way water moves across land imperative to ensuring effective water flow. It may be the case that drainage will need to be ‘designed-in’ where not available to guarantee run-off.

The construction site risk assessment mitigates against all risks, including both fire and flood. As a live document that evolves across a project, the risk assessment ensures hazards are considered at each phase of the construction project. Such risks can include the presence of hazardous materials, ignition sources, planned hot works, temporary electrics, fuel storage, weather exposure, and changes to drainage patterns.

For instance, if the site security risk assessment identifies a high-risk of flooding, the positioning of sensitive materials, welfare units, and equipment in elevated locations on the project should be encouraged. If the environment is flat, raised platforms are a good compromise.

For projects involving excavations or groundwork, a risk assessment may encourage the use of tarpaulin or heavy sheeting to cover exposed foundations. This temporary measure can prevent water infiltration.

Essential housekeeping on site can be enough to prevent risks from escalating. Keeping a regular schedule of maintenance involving clearing mud, debris, and waste from guttering and drains lowers the risk of blockages while managing waste accumulation across the site will lower the risk and spread of fire.

The construction environment is ever evolving, with regular inspections a requirement in the completion of a risk assessment. This is one of the most effective ways to identify emerging vulnerabilities across a project while ensuring health, safety, security, and environment (HSSE) frameworks are being met.

To stay on top of threats, risk management can be supported with technology-based security solutions. Traditional systems like fixed CCTV can prove effective at providing visual verification after an incident has taken hold. A perimeter intrusion detection device is commonly used in addition to fixed CCTV, or in place of it. Equipped with the technology necessary to proactively identify the warning signs of fire and flood, these devices send an alert to a monitoring team when a potential threat is identified with escalation following if deemed necessary.

The Safer POD® range of perimeter intrusion detection devices is uniquely positioned to offer full risk mitigation, with the potential for security, fire, and flood coverage within a single device managed by one provider. The Safer POD® S4/X4 is equipped with active thermal detection as standard, the optimal choice for early detection of fire risks before they escalate while visually verifying escape of water.

Add-ons to the Safer POD® S4/X4 solution include smoke, heat, and CO₂ sensors to detect emerging fire threats while water detection sensors, pressure monitors to identify leaks early and automatic shut-off valves prevent major loss due to flooding.

With customisation allowing for bespoke configurations to suit your project, the Safer POD® range is compliant, scalable, and can be rapidly deployed across remote and urban projects. 24/7 monitoring, managed by the in-house Safer Group control room, allows for round-the-clock verification and escalation of incidents. This ensures full audit traceability and a rapid response if the worst were to occur.

Taking the complexity out of risk management by enlisting one provider at the site security risk assessment stage can prove effective in ensuring you are covered.

Ultimately, mitigating fire and flood on site is reliant on all stakeholders within a project but reactive measures are not enough to prevent major disruption. The primary objective should be to proactively prevent fire and flood from spreading and causing significant damage.

To achieve this, early detection and verification are essential. The most effective solutions will plan early, identifying risks and hazards at the risk assessment phase. When a solution is actioned to protect the site, people, and assets, having the right technology and approach on side is essential.