How to Price a Fire Curtain Installation: Labour, Materials and Margin Guide

Summary

Fire curtains are automatic fire and smoke barriers that deploy from a concealed head box, usually mounted above a ceiling line or within a bulkhead, and descend to compartmentalise a space when triggered by a fire alarm signal. They're specified where conventional fire doors aren't practical — commonly open-plan retail units, atria, reception areas, and increasingly large domestic open-plan kitchen-diner extensions where Building Regulations require fire compartmentation to protect an escape route (typically a stairwell) but the client wants to retain an open-plan layout without a physical door blocking the space day to day.

For tradespeople and contractors pricing this work, the key thing to understand upfront is that fire curtains sit in a different category from most fit-out and joinery-adjacent work: they're a life-safety system, subject to specific commissioning and ongoing servicing requirements, and in most cases should be supplied and installed by a manufacturer-approved or third-party-certified installer rather than fitted generically by a builder or shopfitter. This guide is written for contractors coordinating this work as part of a wider extension or fit-out project — pricing the specialist supply-and-install package, understanding what drives cost, and knowing what to hand off to a certified specialist rather than attempt in-house.

Getting the fire rating and drop height wrong, or having the curtain installed by someone without the relevant competency, isn't just a quality issue — it can mean the completed building fails to satisfy the fire strategy signed off with Building Control, with real consequences for occupancy certification and insurance validity.

Key Facts

• What a fire curtain is — a fabric (typically fibreglass or similar fire-resistant textile) barrier stored in a concealed head box above the opening, which drops automatically on fire alarm activation to close off the opening and restrict fire and/or smoke spread
• Fire integrity ratings — commonly specified at 30, 60, or 120 minutes, denoting how long the curtain maintains its fire-resisting integrity under test conditions; the required rating is set by the building's fire strategy, not chosen freely by the installer
• Common use cases — open-plan retail units, shopping centre atria and malls, office reception areas, large domestic open-plan kitchen-diner extensions requiring compartmentation of an escape stairwell, car park entrances, and industrial unit compartmentation
• Why fire curtains instead of fire doors — used where a physical door would obstruct the intended open-plan use of a space day-to-day, while still needing to provide compartmentation in a fire event; the curtain is invisible/retracted in normal use and only deploys when triggered
• Head box — the concealed housing containing the rolled curtain fabric, drive mechanism, and controls; typically mounted within a ceiling void, bulkhead, or exposed box where no void is available
• Activation — automatically triggered by connection to the building's fire alarm system; most systems also include a local smoke/heat detector and a manual override/test facility
• Guide rails/side guides — vertical channels either side of the opening that the curtain descends within, ensuring the fabric seals against the sides of the opening rather than simply hanging free
• Relevant British Standard — BS 8524 covers active fire curtain barrier assemblies: Part 1 (BS 8524-1:2025) is the specification — design, testing and classification requirements for the assembly, its control devices and ancillary equipment; Part 2 (BS 8524-2:2025) is the code of practice for application, installation and maintenance. The series was republished in November 2025, resolving a prior scope-overlap issue with a related BS EN product standard
• Competency requirement — installation, commissioning, and servicing should be carried out by a manufacturer-trained or third-party-certified installer (schemes such as those operated by BM TRADA, IFC, or similar third-party certification bodies are common in the industry) — this is not general builder or shopfitter work
• Commissioning — a newly installed fire curtain must be commissioned and tested against the fire alarm interface before sign-off, with a commissioning certificate issued and retained as part of the building's fire safety documentation
• Annual servicing requirement — fire curtains require at least annual inspection and servicing by a competent person, in line with BS 8524 guidance and the Regulatory Reform (Fire Safety) Order 2005 requirement to maintain fire safety equipment in efficient working order
• Integration with fire alarm system — the curtain's control panel must be correctly interfaced with the building's fire detection and alarm system (BS 5839 for commercial systems, or the relevant domestic smoke alarm provisions), and this interface should be tested as part of commissioning
• Width and drop constraints — maximum single-curtain widths and drop heights vary by manufacturer and fire rating; wider openings may require multiple curtain sections or a supporting structural mullion, which adds cost
• Smoke seal vs fire-rated curtains — some products are smoke-control only (restricting smoke spread) rather than fire-rated (maintaining integrity against fire); confirm which is specified by the fire strategy before ordering, as they are not interchangeable
• Power and backup — fire curtains require a mains power supply with battery backup to ensure deployment during a power failure, and this needs to be coordinated with the electrical first fix
• Documentation for Building Control/fire strategy sign-off — the fire curtain's certification, fire rating test evidence, and commissioning certificate typically need to be provided to Building Control or the project's fire engineer as part of the completed fire strategy evidence pack

Quick Reference Table

Figures assume a single curtain per opening, straightforward head box mounting (accessible ceiling void or exposed bulkhead), and reasonable access for installation. Multiple curtains, structural mullions for very wide openings, or difficult access increase cost significantly.

Detailed Guidance

Who should be pricing and doing this work

This is the point to be explicit about at the outset of any quote involving a fire curtain: this is specialist fire-safety installation work. A general builder should coordinate the opening, head box void, power supply, and fire alarm interface as part of a wider project, but the curtain supply, installation, and commissioning itself should be carried out by a manufacturer-approved or third-party-certified fire curtain installer. Quoting this work as a standard joinery or shopfitting item, or having an uncertified installer fit it to save cost, creates real risk: an incorrectly installed or commissioned fire curtain can fail to deploy correctly in a fire event, and the building's fire strategy sign-off (and insurance position) may not be valid if the installation wasn't carried out and certified by a competent party.

For a contractor managing a project with a fire curtain specified, the practical approach is to obtain a supply-and-install quote from a certified specialist, and price your own coordination role (opening preparation, structural support if needed, power first-fix, liaison with the fire alarm installer) as a separate line item alongside the specialist's quote.

Cost components to price

1. Curtain and head box supply — the fabric curtain, head box housing, drive mechanism, and guide rails, sized to the opening width and specified fire rating
2. Structural support/mullion — for openings wider than a single curtain's maximum span, an intermediate structural mullion may be required to support a two-part (or more) curtain arrangement
3. Installation labour — specialist installer time to fit the head box, guide rails, and commission the mechanism
4. Electrical interface — connection to the fire alarm system and provision of mains power with battery backup; often priced as a separate electrical first-fix item coordinated with the specialist installer
5. Commissioning and certification — testing against the fire alarm system, issuing the commissioning certificate for the fire safety documentation pack
6. Builder's work — preparation of the opening, ceiling void or bulkhead to house the head box, and any making good around the finished installation
7. Ongoing annual servicing — not part of the initial installation cost, but should be flagged to the client as a required ongoing cost

Worked example — domestic open-plan kitchen-diner, single 4m opening, 60 minute rating

Typical job: a single-storey rear extension creating an open-plan kitchen-diner, where the fire strategy agreed with Building Control requires a 60-minute fire curtain across the 4m opening to the hallway/stairwell to maintain the escape route's fire compartmentation while keeping the space visually open day-to-day.

This sits within the standard range for a single domestic-scale fire curtain installation.

Worked example — small retail unit, 6m opening, 60 minute rating, structural mullion required

Typical job: a retail unit shopfront refurbishment where the fire strategy requires a fire curtain across a 6m opening between the sales floor and a rear stockroom/escape corridor, exceeding a single curtain's maximum span and requiring an intermediate structural mullion.

The structural mullion and two-part curtain arrangement push this well above a standard single-width domestic job.

What drives cost beyond width and rating

• Fire rating — a 120-minute curtain uses heavier, more fire-resistant fabric and typically a more robust drive mechanism than a 30 or 60-minute product, adding materially to supply cost
• Access for installation — head box mounting in a tight or inaccessible ceiling void takes longer than an exposed bulkhead installation with clear access
• Structural support requirements — wide openings needing an intermediate mullion, or openings without adequate structure to carry the head box load, add both materials and specialist structural input
• Fire alarm system complexity — integrating with an existing commercial fire alarm panel (particularly on a refurbishment where the existing system's interface documentation may be incomplete) takes longer than a straightforward new-build domestic smoke alarm interface
• Number of curtains — multiple openings on the same project benefit from some shared mobilisation cost, but each curtain still needs its own commissioning and certification

Servicing and the ongoing cost the client needs to know about

A fire curtain is not a fit-and-forget item. It requires at least annual inspection and servicing by a competent person to remain compliant with the Regulatory Reform (Fire Safety) Order 2005's requirement to maintain fire safety equipment in efficient working order, and this is typically also a condition of the manufacturer's warranty. Flag this clearly at quoting stage — a client who isn't told about the ongoing £150–£350 annual servicing cost per curtain will be an unhappy client when the invoice for it arrives, and an unserviced fire curtain is also a genuine safety and compliance liability for the building's responsible person.

Common pricing mistakes

• Quoting fire curtain supply and install as if it were standard joinery/screen work, without accounting for the specialist certified-installer requirement
• Not separating builder's work (opening prep, bulkhead, making good) from the specialist supply-and-install package — these are typically priced and delivered by different parties
• Forgetting the electrical first-fix and fire alarm interface as a distinct cost item, particularly on a refurbishment where the interface with an existing alarm panel needs specialist coordination
• Omitting the annual servicing requirement from the client conversation, leaving them unaware of an ongoing compliance cost
• Under-specifying fire rating relative to what the project's fire strategy actually requires — always confirm the required rating with the fire strategy document or fire engineer, never assume

Frequently Asked Questions

Can a general builder install a fire curtain to save cost?

Not advisable, and in most cases not appropriate. Fire curtains are life-safety fire compartmentation equipment, and installation, commissioning, and servicing should be carried out by a manufacturer-trained or third-party-certified installer. A builder can and should coordinate the surrounding works (opening preparation, structural support, electrical first-fix, making good), but the curtain itself needs specialist supply, installation, and commissioning to be valid against the building's fire strategy and, typically, to be covered by manufacturer warranty and building insurance.

What margin should I target on fire curtain work?

25–30% is typical where you're managing the project and passing through a specialist installer's supply-and-install quote plus your own builder's work. If you're the certified specialist installer pricing the full package directly, margins in the 30–40% range are common given the specialist competency and liability involved.

How do I know what fire rating is required for a given opening?

The required fire rating comes from the building's fire strategy — either a fire engineer's report for larger/commercial projects, or the fire compartmentation requirements agreed with Building Control as part of a domestic extension's Building Regulations approval (commonly relevant to protecting an escape route such as a stairwell in an open-plan layout). Never assume or default to a rating — always obtain it from the project's fire strategy documentation before ordering, since supplying the wrong rating is both a compliance failure and, typically, non-returnable once manufactured to spec.

Does a domestic open-plan kitchen-diner always need a fire curtain, or are there alternatives?

Not always — a fire curtain is one solution among several for maintaining compartmentation around an open-plan layout (others include a conventional self-closing fire door, or redesigning the layout to physically separate the escape route). Fire curtains are typically specified where the client wants to retain a genuinely open, undivided space with no visible door or screen in normal use. Whether it's required at all, and which solution is appropriate, should be determined by the project's fire strategy or Building Control discussion — not decided independently by the installing contractor.

Regulations & Standards

• BS 8524-1:2025 — Active fire curtain barrier assemblies. Part 1: Specification — design, testing and classification of the assembly, control devices and ancillary equipment

• BS 8524-2:2025 — Active fire curtain barrier assemblies. Part 2: Code of practice for application, installation and maintenance

• Regulatory Reform (Fire Safety) Order 2005 — statutory requirement to maintain fire safety equipment, including fire curtains, in efficient working order through regular servicing

• Building Regulations Approved Document B (Fire safety) — fire compartmentation and means of escape requirements that typically drive the specification of a fire curtain within a building's fire strategy

• BS 5839 — Fire detection and fire alarm systems for buildings; relevant to the alarm interface a fire curtain's control system connects to

• BS EN 12101-1 (where applicable) — Smoke and heat control systems, Part 1: Specification for smoke barriers; relevant to smoke-control-rated (as opposed to fire-rated) curtain products

• GOV.UK — Approved Document B, Fire Safety

• GOV.UK — Regulatory Reform (Fire Safety) Order 2005

• BSI — BS 8524 Active fire curtain barrier assemblies — BSI (verify current edition directly with BSI)

• Fire Industry Association — fire curtain guidance

• National Fire Chiefs Council — fire safety guidance

• fire risk assessment — fire risk assessment requirements relevant to specifying and maintaining fire safety equipment

• building regs appeals — Building Regulations process context relevant where fire strategy compliance is disputed

• attenuation tank installation pricing guide — another example of pricing a specialist compliance-driven installation with a similar structure