Mitigating Fire and Flood Risks in Unoccupied Industrial Units

Updated: 25 Jun 2026 · Category: Vacant Property / Risk Mitigation

Fire and water damage represent the most expensive risks for vacant industrial units. Here is how to protect your assets.

Unoccupied industrial units - such as manufacturing bays, warehouses, and storage depots - are vulnerable to fire and water damage. Without employees on site to detect a smoking wire or a dripping pipe, a small incident can quickly result in the total destruction of the property. Landlords must take active steps to mitigate these risks.

1. Water Isolation and Pipe Draining

Standing water in pipes will freeze during winter, leading to split pipes and flooding when the thaw occurs. Landlords should shut off the main water valve and drain the entire plumbing system. For properties with wet fire sprinkler systems, keep the water active but ensure the heating is set to maintain a minimum temperature of 4°C to prevent freezing.

2. Fire Risk Reduction: Waste Management

Arson is a leading cause of fires in vacant commercial buildings in the UK. Intruders look for easy materials to light. Landlords must remove all combustible materials - such as wooden pallets, packaging, papers, and waste - from both the interior and exterior areas near the walls.

3. Electrical Safety isolation

Electrical faults are a major cause of fires. Isolate the power supply at the main board, leaving active only the specific circuits required to run security alarms, remote monitoring systems, and fire alarms.

Emergency Response and Liaison Protocols

Mitigating fire and flood risks in vacant industrial buildings requires clear emergency response protocols. If a security patrol detects a leak or a fire hazard, they must have immediate access to utility shut-off valves and contact details for emergency services. The response plan should outline the steps for isolating water mains, securing gas supplies, and notifying the property owner's designated contacts.

Security providers should coordinate with local fire and rescue services to ensure they have information about the building's layout and any stored materials. This proactive liaison helps reduce response times and limits damage to the property in the event of an emergency.

Frequently Asked Questions

Q: How do I prevent arson and fire hazards in an empty industrial unit?

A: Clear all combustible waste (wooden pallets, boxes, rubbish) from the site, secure perimeter fences, and install monitored smoke sensors linked to a remote dispatch station.

Q: What emergency isolation checks should be done when decommissioning a vacant warehouse?

A: Isolate and drain water pipes to prevent bursts, turn off gas valves, disconnect non-essential electrical circuits, and secure any remaining hazardous materials.

Q: Who do vacant property security guards coordinate with in a fire or water emergency?

A: The security team contacts emergency services immediately, utilizes utility shut-off valves to limit damage, and alerts the property owner's designated keyholders.

Q: Does vacant property insurance cover water damage from frozen pipes if the heating was off?

A: Most policies require water supplies to be isolated and drained if the heating is turned off. Failing to do so can invalidate your property damage coverage.