The short answer
Fire shutters are steel roller shutters tested to resist fire, suited to industrial openings, conveyor gaps and areas needing robustness or security. Fire curtains are fabric barriers that drop from a slim head box, suited to tight spaces and architectural openings. Both close automatically on alarm. The fire strategy sets the rating; the opening, use and environment decide the product.
Key points
- Fire shutters are steel and robust; fire curtains are fabric and compact.
- Choose shutters for industrial, high-impact or security-sensitive openings.
- Choose curtains where head space is tight or the opening must be concealed.
- The fire strategy sets the rating; the product's test evidence must cover your size and setup.
- Both need regular testing; alarm release interfaces should follow BS 7273-4.
What is the difference between a fire shutter and a fire curtain?
A fire shutter is a steel roller shutter, tested as an assembly to resist fire, that coils above an opening and drops to close it; a fire curtain is a fabric barrier, typically woven glass fibre, that unrolls from a compact head box. Both stay open in normal use and close automatically on a fire signal or loss of power to maintain compartmentation.
Neither is a door for everyday traffic in the usual sense; both are part of the building's passive fire protection, and the choice between them is as much about the opening, environment and use as about fire performance.
Both are only as good as their test evidence and installation. New CE or UKCA-marked fire shutters are tested to BS EN 1634-1 and classified to BS EN 13501-2 under BS EN 16034, the product standard for fire-resisting industrial doors, used with BS EN 13241; older installed shutters may hold test evidence to BS 476-22. Active fire curtain assemblies are covered by BS 8524-1 for the product and BS 8524-2 for application, installation and maintenance, both revised in 2025. The rating belongs to the manufacturer's tested product.
How do fire shutters and fire curtains compare?
The table compares the two in common situations in industrial and commercial buildings. Exact performance depends on the product and its test evidence, so check the manufacturer's certification for any specific model.
| Factor | Fire shutter | Fire curtain |
|---|---|---|
| Construction | Steel laths in steel guides | Fabric, usually woven glass fibre, in slim guides |
| Head space | Needs room for the coil and barrel | Compact head box, easier to conceal |
| Robustness | Withstands knocks and rough use | Fabric and guides vulnerable to impact |
| Security | Can double as a physical security barrier | Not a security barrier |
| Radiation and insulation | Steel conducts heat; insulation performance varies by product | Varies by product and classification |
| Typical uses | Warehouses, conveyor openings, service counters, plant rooms | Atria, lift lobbies, open-plan offices, retail, heritage interiors |
| Daily operation | Some models suit daily use as a door | Not usually intended as an everyday door |
When is a fire shutter the better choice?
A fire shutter is usually the better choice in industrial settings where the opening is large, the environment is harsh, or the shutter may be knocked by vehicles or goods. Steel laths and guides stand up to forklift traffic and dusty conditions far better than fabric.
- Openings in compartment walls between warehouse and production areas.
- Conveyor openings, where a fire shutter can be designed to close around or after the conveyor.
- Service hatches, counters and plant room openings.
- Places where the opening must also be secured out of hours.
A single fire shutter with control panel and fail-safe closing is a guide £4,495 to £11,995, ex VAT, confirmed after survey.
When does a fire curtain make more sense?
A fire curtain makes more sense where space is tight, appearance matters and the opening is not exposed to impact. Its slim head box can be hidden in a ceiling void or bulkhead, which suits offices, atria, retail areas and listed interiors, and it can protect openings where there is no room for a shutter coil.
Fire curtains are also used to protect escape routes and lift lobbies, and some types are designed to drop in stages to leave a gap for escape before closing fully. Those uses need careful design within the fire strategy.
In industrial buildings, fire curtains appear most often in offices, mezzanine edges and staff areas rather than in the warehouse itself. They are specified on survey alongside the fire engineer's requirements.
How does the fire strategy decide what you need?
The building's fire strategy and the fire engineer or building control body set the required fire resistance, the compartment lines and the escape routes; the shutter or curtain is then chosen to meet those requirements. The product is not a substitute for the strategy.
Before specifying either, confirm:
- the fire resistance period and whether insulation as well as integrity is required;
- whether the opening is on an escape route, and whether the barrier must allow escape before closing;
- how it will be released: alarm signal, local detection, loss of power or fusible link;
- how the alarm interface will be designed, following BS 7273-4 where release is linked to the fire alarm;
- whether it will be used daily or only in an emergency;
- what manufacturer's test evidence covers the size and configuration you need.
Fire safety duties for the building sit with the responsible person in England and Wales, the dutyholder in Scotland, and the person with fire safety duties in Northern Ireland.
How do maintenance needs differ?
Both need regular servicing and testing so they close as tested, and neither should be left to sit unchecked for years. Industry practice for fire shutters is a full service with a drop test at least annually, often six-monthly. Fire curtains should be maintained following BS 8524-2 and the manufacturer's instructions.
Shutters wear at guides, laths and closing mechanisms, especially if used daily. Curtains are more vulnerable to fabric damage, guide misalignment and obstructions in their path, and their head boxes can be hard to reach. Whichever you choose, make sure the access needed for testing and maintenance is designed in. Our fire shutter maintenance guide covers what the law expects, and fire shutter servicing is a guide £125 to £265 per shutter, ex VAT.
What mistakes should you avoid when specifying either?
The most common mistake is choosing a product before the fire strategy has fixed what it must do. The next is assuming that any shutter or curtain of the right rating will work in any opening, when the test evidence only covers certain sizes, fixings and supporting constructions.
Other common problems include:
- shutters fixed to walls or steelwork that do not themselves have the required fire resistance;
- gaps around the head box or guides left unsealed, or sealed with unsuitable materials;
- cable trays, pipes or racking installed later in the closing line;
- control panels positioned where they will be damaged or are hard to reach;
- no allowance in the programme for commissioning with the fire alarm contractor;
- handover packs missing the manufacturer's test evidence or installation certificate.
Each of these can leave a barrier that looks complete but will not perform as tested. A clear specification, a survey of the supporting structure and a joint commissioning test with the alarm contractor avoid most of them.
It is also worth thinking about the life of the building. An opening that is quiet today may become a busy route after a change of tenant or layout, which can change the right answer. Robust choices, such as protecting a fire shutter with guards or locating a curtain away from traffic, cost little at the design stage.
Frequently asked questions
Can a fire curtain replace a fire shutter in a warehouse?
Sometimes, but it needs care. A curtain can provide the required fire resistance, but its fabric and guides are more easily damaged by forklifts and goods, and it offers no security. In busy warehouse openings a fire shutter, protected by bollards and guards, is usually more practical. The fire strategy and test evidence must support whichever you choose.
Do fire shutters provide insulation as well as integrity?
It depends on the product and its classification. Many steel shutters provide integrity, holding back flames and hot gases, but limited insulation, so the unexposed face can become hot. Where the fire strategy requires insulation, for example near escape routes or combustible storage, specify a product classified for it or provide a clear zone.
Can a fire shutter be used as an everyday door?
Some models are designed and tested for daily operation, others are intended to stay open until a fire. Check the manufacturer's information before using a fire shutter as a working door. Daily use increases wear on guides, curtains and closing mechanisms, so it calls for more frequent servicing and impact protection.
What happens to a fire shutter or curtain in a power cut?
Both are normally designed to fail safe, closing by gravity under controlled speed when power or the alarm signal is lost, or holding open on battery backup for a set time and then closing, depending on the design and fire strategy. The behaviour should be documented and tested at every service.
Sources
- BS 8524-1:2025 Active fire curtain barrier assemblies. Specification (BSI)
- BS 8524-2:2025 Active fire curtain barrier assemblies. Application, installation and maintenance (BSI)
- BS EN 16034:2014 Fire resisting and/or smoke control characteristics (BSI)
- BS 7273-4 Actuation of release mechanisms for doors (BSI)
This guide is general information about UK rules and good practice, not legal advice. Check the official sources and your own risk assessment for your site.