Passive Fire Protection Contractor Insurance UK 2026
Why does a passive fire protection contractor need specialist insurance?
The demand side is a programme, not a market. At the end of June 2026 the government's remediation data recorded 4,469 residential buildings of 11 metres and above identified with unsafe cladding, of which 1,681 (38%) were remediated, 698 (16%) had started and 2,090 (47%) had not yet begun; almost every one of those buildings also needs its compartmentation surveyed and its fire-stopping remediated, because the Grenfell Tower Inquiry's Phase 2 report and the CROSS-UK safety reports that followed found that poor fire-stopping installation — including by certificated contractors — is "not uncommon". The Building Safety Regulator expects a golden thread of information for every higher-risk building, regulation 38 of the Building Regulations requires fire safety information to be handed over at completion, and every principal contractor now asks its fire-stopping subcontractor for a third-party certificate and an insurance certificate in the same email.
The supply side of insurance is narrower than the demand. Package and scheme liability markets decline fire protection installation by rule or write it with the efficacy exclusion intact — a policy that covers the fire-stopping contractor for dropping a tin of mastic on a car and for nothing else. Design liability, which every installer who chooses a product, a depth or a detail on site is carrying, is uninsured without a contractors' PI or design-and-construct policy, and the construction PI market's fire safety and cladding exclusions apply to it. The specialist market that remains — a small number of Lloyd's syndicates and MGAs with fire protection appetite — writes on certification, product traceability and contract discipline, and prices the efficacy deletion as the core of the placement.
This guide sets out the efficacy exclusion and what removes it, the five policies a passive fire protection contractor needs, when an installer becomes a designer, why certification comes first, how the Building Safety Act and the remediation programme change the exposure and its limitation period, which contract terms move risk outside the insurance, and how a passive fire protection business is placed. It sits with our fire risk assessor PI guide and our Principal Designer PI guide in the Building Safety Act cluster, and connects to our contractors combined insurance page, where most of these enquiries begin.
Key facts at a glance
- The efficacy exclusion is the whole risk. Standard contractors' liability excludes loss arising from a fire protection installation failing to perform its intended function. Fire-stopping only causes loss by failing to work. The exclusion must be deleted, in writing, for certified activities.
- Every installer is a designer on site. Choosing the seal, the depth, the batt density or the coating thickness for a penetration the drawings did not detail is a design decision. It needs contractors' PI or a design-and-construct policy — and the construction PI market's fire safety exclusions apply to it.
- Third-party certification is the first underwriting question. FIRAS, IFC Certification and BM TRADA Q-Mark installer schemes, and ASFP membership, are what specialist markets ask for before turnover. Uncertified fire-stopping contractors are declined by most.
- Liability runs fifteen years, not six. Section 135 of the Building Safety Act 2022 extended Defective Premises Act claims to fifteen years prospectively and thirty retrospectively from 28 June 2022. Run-off must match.
- Building liability orders follow the work, not the company. Sections 130–132 let the High Court extend liability for a building safety risk to an associated company — a phoenix or a group restructure does not shed the exposure.
- 4,469 buildings of 11m+ with unsafe cladding were identified by June 2026, 47% not yet started; almost all need compartmentation and fire-stopping remediation alongside the external wall.
- Regulation 38 and the golden thread make the contractor's records evidence. Product data sheets, test evidence to BS EN 1366, installation photographs and as-built records are what the Building Safety Regulator, the client and a claimant will read — and what the underwriter prices.
How does The Insurability Framework™ apply to passive fire protection contractors?
Placing a passive fire protection contractor in a market that has spent eight years excluding fire safety is exactly what the Insurability Framework was built for.
The Insurability Framework — applied to passive fire protection contractors
Four pillars, one method: separate the installation you can evidence from the sector's reputation, and price the evidence.
Underwriter Intelligence
Fire protection underwriters ask five questions: is every installer FIRAS, IFC or BM TRADA certified and is the certificate scope matched to the work; is every product installed to a tested detail with the manufacturer's evidence to BS EN 1366 or BS 476 on file; is every penetration photographed, labelled and recorded; who specifies when the drawings are silent; and what share of the work is on higher-risk buildings or remediation of someone else's failure? We answer all five in the submission, so the contractor is priced on its evidence rather than on Grenfell.
Difficult Risk Expertise
Package and scheme contractors' markets decline fire protection installation or leave the efficacy exclusion in place. A small number of Lloyd's syndicates and specialist MGAs with fire protection appetite delete the exclusion for certified activities, write contractors' PI for the on-site design decisions, and offer run-off that can actually be bought at the end.
Risk Assessment
We find what the proposal form misses: the design liability nobody insured because "we just install"; the intumescent coating work rated as painting; the survey-and-remediate contract that promises a compliant building; the collateral warranty with a fitness-for-purpose obligation; the subcontractor without its own certificate working under the contractor's name; the fifteen-year tail nobody has priced; and the phoenix structure that section 130 makes pointless.
Claims Advocacy
A claim against a fire-stopping contractor arrives after a fire, or after a survey that finds the work wanting, alongside a principal contractor's pass-down, a building owner's DPA claim and a possible Building Safety Regulator enquiry. We coordinate the liability insurer's adjuster, the PI insurer's panel and the legal expenses solicitor so the contractor speaks with one voice — and has a broker who has read a fire-stopping test report, not a helpline.
What is the efficacy exclusion — and why does it remove the only claim a fire-stopping contractor will ever face?
| Loss event | Standard contractors' liability with efficacy exclusion | Specialist policy with efficacy deleted | Contractors' PI / D&C |
|---|---|---|---|
| Operative drops a tool through a suspended ceiling; damages a client's equipment | Covered — ordinary third-party property damage | Covered | No |
| Fire breaches a penetration seal that was installed with the wrong product; spreads to the adjoining compartment | Excluded — the installation failed to perform its function | Covered — the core purpose of the deletion | Possibly, if the product choice was the contractor's design decision |
| Intumescent coating applied below specified thickness; steel fails early in a fire | Excluded | Covered | Possibly, where thickness was the contractor's calculation |
| Survey finds fire-stopping defective before any fire; client claims cost of re-doing it | Excluded — no third-party damage; the contractor's own work | Usually excluded — rectification of own work is a contractual, not a liability, loss | Yes, where the defect arose from design or specification; otherwise a contract claim on the business |
| Client's tenant claims business interruption after evacuation caused by defective compartmentation found on survey | Excluded | Partly — consequential loss from a defect in the insured's product is often sub-limited or excluded | Yes, subject to the fire safety and cladding exclusions being deleted |
| Cavity barrier omitted at a window head; fire spreads in the external wall | Excluded; also caught by any cladding or external wall exclusion | Covered only if the external wall exclusion is also deleted for the activity | Covered only if the cladding exclusion is deleted |
| Fire damper installed but not tested; fails to close; smoke spread injures occupants | Excluded — injury arising from failure to perform | Covered | Possibly, where commissioning was in the contractor's scope |
| Hot-work fire during intumescent stripping damages the building | Covered subject to the hot-work warranty being met | Covered subject to the warranty | No |
Two points follow. The first is that a policy with the efficacy exclusion in place is not a fire-stopping contractor's policy at all — it is a general contractor's policy sold to a fire-stopping contractor, and the price paid for it is the cost of believing the business is insured. The second is that deletion is not all-or-nothing: specialist markets delete the exclusion for named, certified activities — "fire-stopping and penetration sealing to FIRAS-certified scope", "intumescent coating to structural steel" — and retain it for anything else. A contractor whose certificate covers penetration seals and whose policy deletes efficacy for penetration seals, and who then installs cavity barriers in an external wall, is uninsured for the cavity barriers. Our contractors combined insurance guide covers the general policy; this article covers what fire protection adds to it.
Which policies does a passive fire protection contractor actually need?
| Policy | What it does for a passive fire protection contractor | Typical limit | Non-negotiable terms |
|---|---|---|---|
| Public & products liability | Injury and third-party property damage arising from the work and the installed product, including — once deleted — the failure of the installation to perform in a fire | £5m–£10m; principal contractors on higher-risk buildings increasingly require £10m | Efficacy exclusion deleted for certified activities; fire-stopping and fire protection not listed as excluded activities; external wall exclusion addressed where cavity barriers are installed; hot-work warranty achievable; height and depth limits matched to the work |
| Employers' liability | Injury to employees and labour-only subcontractors — working at height, in ceiling voids, with intumescent and isocyanate products | £10m statutory | Bona fide subcontractors' own EL evidenced; COSHH and RPE regime for spray applications |
| Contractors' PI / design-and-construct | Liability for design, specification, survey and advice — the product choice, the depth, the detail, the survey report that said the compartmentation was adequate | £1m–£5m; matched to collateral warranty requirements | Fire safety and cladding exclusions deleted for the declared activities; retroactive date to inception of the business; run-off provision |
| Contract works, plant & tools | Materials on site, installed work before handover, own plant, hired-in plant, spray equipment | Per contract and per item | Fire-stopping materials in storage; hired-in plant clause |
| Legal expenses | Regulatory prosecution defence (CDM, work at height, COSHH), contract disputes with principal contractors, employment | £100,000–£250,000 | Regulatory scope; contract-dispute section for disputes over payment for remediation of alleged defects |
| Directors' & officers' | Regulatory investigation and personal exposure — Building Safety Regulator enquiries, building liability orders, section 40 CPA / section 37 HSWA prosecutions | £1m–£2m | Regulatory-investigation cover; no building safety exclusion |
The gap most contractors carry is the third row. A passive fire protection contractor that "just installs" is, on every site, choosing between a mineral wool batt and a mastic seal, deciding the depth and the number of layers, judging whether a service is within the tested configuration for the product, and — on survey-and-remediate work — writing a report that says the compartmentation now performs. Every one of those is a professional act, uninsured under the liability policy's professional-advice exclusion and unaddressed by the efficacy deletion. Our complex construction risks guide covers where design-and-construct PI sits in the wider programme.
When does a fire-stopping installer become a designer — and why does that need PI?
Three activities make the design liability unavoidable. The first is product selection against tested detail: a penetration seal is only fire-rated within the configuration in which it was tested to BS EN 1366-3 — the substrate, the aperture size, the service type and diameter, the annular gap, the depth. An installer who applies a product outside its tested field of application has designed an untested seal, and the manufacturer's evidence no longer covers it. The second is the survey report: a survey-and-remediate contractor that inspects a building's compartmentation, records what it found and states what it did has produced a professional opinion that the building owner, the fire risk assessor and the Building Safety Regulator will rely on. The third is intumescent coating specification: the dry film thickness required to achieve a fire resistance period depends on the section factor of the steel, the critical temperature and the manufacturer's assessment; a contractor that calculates or checks the thickness has designed the protection.
The insurance consequence is that the design-and-construct PI market's exclusions apply. Since 2018 most construction PI wordings carry fire safety, cladding and combustible-material exclusions in some form, and a fire-stopping contractor's PI is meaningless with them in place. Specialist markets delete them for declared activities on the strength of certification, manufacturer training records, and a documented process for referring non-standard penetrations to the designer or the manufacturer rather than improvising. The Construction (Design and Management) Regulations 2015 make any contractor who makes design decisions a designer with a regulation 9 duty; the PI policy is what stands behind it. Our Principal Designer PI guide covers the dutyholder regime this design liability feeds into.
Why do underwriters ask for FIRAS, IFC or BM TRADA before anything else?
| Scheme | Operator and scope | What it evidences | What it means to the underwriter |
|---|---|---|---|
| FIRAS installer certification | Warringtonfire (Element); fire-stopping, penetration seals, cavity barriers, intumescent coatings, ductwork, dampers, fire doors, partitions | Company process, operative competence, site audits; scope listed by activity on the certificate | The certificate most often asked for by name; the efficacy deletion is written to its scope |
| IFC Certification installer scheme | IFC; fire-stopping and passive fire protection installers, fire doors | Equivalent UKAS-accredited scheme; company and operative assessment | Accepted as equivalent; scope again defines the deletion |
| BM TRADA Q-Mark | Warringtonfire (formerly BM TRADA); fire door installation and maintenance, fire-stopping | Installer and maintainer competence; particularly recognised for fire doors | Accepted; fire door scope matters for the fire door spoke of the programme |
| LPCB / LPS 1531 & LPS 1271 | BRE Global; installers of fire-stopping (LPS 1531) and passive fire protection (LPS 1271) | Product-and-installer linkage — installed products are LPCB-approved and installation audited | Strongest evidence where the client specifies LPCB-approved systems |
| ASFP membership and competency pathway | Association for Specialist Fire Protection; requires third-party certification for contractor members; levels 2–3 competency | Industry-body standing; operative competency records | Read as a quality marker alongside, not instead of, scheme certification |
| Manufacturer training and approved-installer status | Hilti, Promat, Rockwool, Siderise, Sherwin-Williams, Nullifire and others | Product-specific installation training; access to tested details and technical support | Evidence that installation follows tested detail; supports the design-liability position |
Certification is also the boundary of the cover. A FIRAS certificate scoped to "penetration seals and linear gap seals" does not evidence competence in intumescent coating or cavity barriers, and a specialist policy will delete efficacy only for the certified scope. Contractors expanding into new activities — most commonly from internal fire-stopping into external wall cavity barriers as remediation work grows — need the certificate scope extended and the policy endorsed before the first job, not after. The CROSS-UK report that documented incorrect fire-stopping by a certificated contractor is a reminder that certification is evidence, not a guarantee; underwriters read it alongside the contractor's own records.
Which cover does each type of passive fire protection business need?
Passive Fire Protection Cover Checker
Select the type of business to see the insurance programme and the exclusions to negotiate
Fire-stopping and penetration sealing contractor
- LEGAL Employers' Liability £10m
- ESSENTIAL Public & Products Liability £5m–£10m with the efficacy exclusion deleted for FIRAS/IFC-certified fire-stopping scope
- ESSENTIAL Contractors' PI £1m–£2m for product selection against tested detail and non-standard penetrations — fire safety exclusion deleted
- ESSENTIAL Installation records: photograph, label and log every penetration; product batch traceability
- ESSENTIAL Contract works and tools; hired-in plant for access equipment
- RECOMMENDED Legal Expenses with regulatory and contract-dispute scope
- CONSIDER Run-off provision from year one — fifteen-year tail on dwelling work
Intumescent coating and structural steel fire protection
- CRITICAL Do not let the activity be rated as "painting and decorating" — the underwriter must know it is fire protection, or the efficacy exclusion and a misdescription both apply
- LEGAL Employers' Liability £10m — spray application, isocyanates, confined spaces, working at height
- ESSENTIAL Public & Products Liability £5m–£10m, efficacy deleted for certified intumescent coating scope; hot-work warranty achievable where stripping or welding preparation is involved
- ESSENTIAL Contractors' PI £2m–£5m for dry film thickness specification and checking — the thickness calculation is design
- ESSENTIAL DFT records for every member; manufacturer's assessment on file; FIRAS or LPCB coating scope
- RECOMMENDED Contract works for coated steel before handover; environmental liability for overspray and solvent
Cavity barrier and external wall remediation contractor
- CRITICAL Cavity barriers sit inside the external wall — both the efficacy exclusion and the external wall / cladding exclusion must be deleted for the activity. Most policies retain the second
- LEGAL Employers' Liability £10m — mast climbers, scaffolds, cradles
- ESSENTIAL Public & Products Liability £10m; principal contractors and remediation funders require it on 18m+ buildings
- ESSENTIAL Design-and-construct PI £2m–£5m with cladding and combustible-material exclusions deleted — cavity barrier positioning and product choice are design
- ESSENTIAL Collateral warranty review — funders' warranties often carry fitness-for-purpose language the PI will not cover
- ESSENTIAL Run-off planned for fifteen years — all of this work is dwelling-related
- RECOMMENDED D&O; Legal Expenses; see our cladding and EWS1 guide for the building-owner side
Fire-resisting ductwork and fire damper contractor
- LEGAL Employers' Liability £10m
- ESSENTIAL Public & Products Liability £5m–£10m, efficacy deleted for ductwork and damper installation, testing and maintenance scope
- ESSENTIAL Contractors' PI for damper selection, positioning at compartment lines and commissioning sign-off — a damper that was never tested is a design and a commissioning failure
- ESSENTIAL Maintenance contracts declared — annual damper drop-testing under BS 9999 is a recurring liability, not a one-off
- ESSENTIAL Commissioning and test records retained for fifteen years
- RECOMMENDED Legal Expenses; contract works for installed ductwork before handover
Survey-and-remediate compartmentation firm
- CRITICAL The survey report is a professional opinion relied on by the owner, the fire risk assessor and the regulator. It is uninsured without PI with the fire safety exclusion deleted — and the PI limit must reflect the buildings surveyed, not the fees
- LEGAL Employers' Liability £10m
- ESSENTIAL Public & Products Liability £5m–£10m, efficacy deleted for the remediation scope
- ESSENTIAL Professional Indemnity £2m–£5m covering survey, report, specification and remediation design; retroactive date to first survey
- ESSENTIAL Terms of engagement: visual and non-destructive scope stated; areas not accessed recorded; no warranty of compliance
- ESSENTIAL Separation between the survey and the remediation quotation — a conflict underwriters price
- RECOMMENDED Legal Expenses; D&O; see our fire risk assessor PI guide for the assessment side
Subcontractor on higher-risk buildings (18m / 7 storeys residential, hospitals, care homes)
- CRITICAL The principal contractor's insurance clause and collateral warranties will require what the package policy excludes. Read both before signing
- LEGAL Employers' Liability £10m
- ESSENTIAL Public & Products Liability £10m with efficacy deleted; indemnity to principal clause; cross-liability
- ESSENTIAL Design-and-construct PI £2m–£5m to match warranty requirements, fire safety and cladding exclusions deleted
- ESSENTIAL Golden thread records: every installation photographed, product and batch recorded, handed to the principal contractor for regulation 38 and the Gateway 3 application
- ESSENTIAL D&O with regulatory-investigation cover — the Building Safety Regulator's enquiries reach the subcontractor's directors
- RECOMMENDED Legal Expenses; run-off funded for fifteen years; contract review for fitness-for-purpose language
Are you ready to present a passive fire protection contractor to an underwriter?
Passive Fire Protection Readiness Self-Check
Click each item you can evidence. Ten or more and the efficacy deletion is negotiable now; fewer than six and the business is not ready to go to market.
- Third-party installer certificate — FIRAS, IFC, BM TRADA or LPCB, with the scope listed and matched to every activity the business undertakes
- Operative competence records — scheme assessments, manufacturer training, ASFP competency levels, for every operative including labour-only subcontractors
- Product evidence library — test reports and classification to BS EN 1366 / BS EN 13501 or BS 476 for every product installed, with the tested field of application
- Installation record system — every penetration or element photographed, labelled, located on a drawing and logged with product and batch
- Non-standard penetration procedure — written process for referring configurations outside tested detail to the manufacturer or designer, with the referral record
- Activities schedule — fire-stopping, coatings, cavity barriers, ductwork, dampers, doors, survey, maintenance — each declared with its share of turnover and its certification
- Contract profile — share of work on higher-risk buildings, on remediation, as subcontractor vs direct; largest contract value; collateral warranties given
- Standard terms and warranty review — reasonable skill and care basis; no fitness-for-purpose; liability cap; net contribution; insurance clause matched to the policy
- Health and safety system — CDM arrangements, work at height, COSHH for coatings, hot-work permits, SSIP accreditation
- Handover and golden thread pack — regulation 38 information, as-built records and O&M contribution issued for every completed contract and retained fifteen years
- Continuous insurance history — liability and PI certificates back to inception, retroactive date confirmed, no gaps
- Claims, circumstances and defect notifications — five years, including every survey that found the business's work wanting and every fire at a building it worked on, whether or not a claim followed
How hard will your business be to place?
Passive Fire Protection Placement Assessor
Select the highest-consequence activity and the evidence available to see how the market will read the business
How do the Building Safety Act, the golden thread and regulation 38 change the contractor's exposure?
| Provision | What it does | What it means for the contractor |
|---|---|---|
| Building Regulations 2010, reg 38 | Fire safety information must be given to the responsible person on completion of any building to which the Fire Safety Order applies | The fire-stopping contractor's as-built records, product data and locations are part of that information; an absent or inaccurate record is a defect in its own right |
| Building Regulations 2010, reg 7 and Approved Document B | Materials and workmanship to be adequate; reg 7(2) bans combustible materials in external walls of relevant buildings over 18m (11m for some purposes); ADB sets fire resistance periods and compartmentation requirements | Product choice in external walls is constrained by law; the fire resistance period the installation must achieve is set by the strategy, not the contractor |
| BSA 2022 Part 3 — higher-risk building gateways | Gateway 2 approval before construction, Gateway 3 completion certificate before occupation; Building Safety Regulator as building control authority | Fire-stopping evidence is Gateway 3 evidence; a rejected certificate is a delay claim passed down the chain |
| BSA 2022 Part 4 — golden thread | Accountable persons must keep accurate, accessible, up-to-date building information throughout the building's life | The contractor's records live in the golden thread for as long as the building stands, and will be read against the installation in any fire investigation |
| BSA 2022 s.135 — limitation | Defective Premises Act 1972 s.1 claims: 30 years retrospective for dwellings completed before 28 June 2022, 15 years prospective after; s.2A DPA extends to refurbishment work; s.38 Building Act (when commenced) 15 years | Every dwelling-related fire-stopping contract carries a fifteen-year tail; work done since 1992 can be the subject of a claim today |
| BSA 2022 ss.130–132 — building liability orders | The High Court may make a body corporate's liability for a building safety risk the liability of an associated company — same group, common control, or a successor after a transfer | Restructuring, phoenixing or letting the trading company go does not shed the liability; the PI and liability policies, with run-off, are the only protection |
| BSA 2022 ss.124–125 — remediation orders and contribution orders | First-tier Tribunal can order a landlord to remediate relevant defects and order developers and associates to contribute | Contribution orders drive recovery claims down the chain to the contractor whose work is a relevant defect |
| CDM 2015 reg 9 / BSA dutyholder competence | Designers must have the skills, knowledge, experience and behaviours for the work; dutyholders must ensure appointees are competent | The principal contractor's competence check is the third-party certificate; an uncertified subcontractor is one the principal contractor cannot lawfully appoint on a higher-risk building |
The cumulative effect is that a passive fire protection contractor's liability is now documentary, long and inescapable. The records it keeps are the defence or the admission; the period over which it can be sued exceeds the life of most contracting businesses; and the corporate devices that once limited a contractor's exposure no longer work. Insurance is the only mechanism left that transfers the risk, which is why the efficacy deletion, the PI and the run-off plan are not extras but the whole point. Our Principal Designer PI guide covers the dutyholder regime the contractor's certificate feeds into.
What does the remediation programme mean for passive fire protection contractors — and their insurers?
The programme has four funding routes with different contractual shapes. The Building Safety Fund (640 buildings, 75% complete by June 2026) and the Cladding Safety Scheme (1,395 eligible buildings, 9% complete) fund building owners who appoint contractors under standard construction contracts with funder-required collateral warranties. Developer-led remediation under the developer remediation contract (2,614 buildings identified, 23% complete) sees developers appoint remediation contractors, often the original trades, under terms that pass the developer's obligations down. Social housing self-funded remediation (556 buildings, 60% complete) runs through registered providers' frameworks. In each case the fire-stopping contractor is at the bottom of a chain whose top has statutory and funding obligations to deliver a compliant building, and whose warranties say so.
For insurance, remediation work raises four issues the specialist market prices. First, the inherited condition: the contractor is remediating fire-stopping it did not install, in a building whose compartmentation may be deficient in ways the survey did not find, and its remediation report will be relied on as a statement of the whole. Second, the occupied building: work in occupied residential blocks carries higher public liability exposure and, where interim measures fail, evacuation and business-interruption claims. Third, the external wall overlap: cavity barrier remediation is external wall work and engages the cladding exclusion. Fourth, the warranty language: funder and developer warranties routinely carry fitness-for-purpose obligations and reliance by multiple beneficiaries, which the contractual-liability exclusion on both the liability and the PI policy will not cover. We review every remediation warranty before it is signed, and negotiate "reasonable skill and care" language where the contractor has any leverage at all. Our cladding and EWS1 buildings insurance guide covers the building-owner side of the same programme.
How long does a fire-stopping contractor stay liable — and what does run-off cost?
The two policy bases behave differently at the end of the business, and the difference matters. Public and products liability is written on an occurrence basis: the policy in force when the fire happens responds, even if the installation was ten years earlier and the contractor has since ceased trading — provided a policy was in force on the date of the fire. A contractor that ceases trading and cancels its liability cover has no policy on the date of a future fire; products liability run-off, which specialist markets offer for installed work, is the answer. Contractors' PI is claims-made: the policy in force when the claim is notified responds, so a claim arriving after the practice has stopped is covered only by run-off. The DPA's fifteen-year prospective period makes fifteen years of run-off the prudent horizon for any contractor whose work touched dwellings — which in the remediation era is most of them.
Run-off is cheapest planned and dearest improvised. Specialist markets offer declining run-off to contractors they already insure with a clean record; a contractor that arrives at retirement uninsured, after a gap, or after a decline has few options and pays for them. We budget run-off for every passive fire protection contractor from the first placement and record it in the business's succession plan, and we treat the sale of the business as an insurance event: the buyer's due diligence will ask for the run-off position, and building liability orders mean the buyer inherits the exposure whether or not it inherits the policy. Our guide to professional indemnity run-off cover sets out the mechanics.
Which contract terms move a passive fire protection contractor's risk outside its insurance?
| Term | What it does | Insurance effect | What to negotiate |
|---|---|---|---|
| Fitness for purpose | Obliges the contractor to achieve a result — "the works shall achieve 60 minutes' fire resistance" — regardless of care taken | Excluded by the contractual-liability exclusion on PI and liability wordings; the contractor is uninsured for the strict promise | "Reasonable skill and care" or "the skill and care of a competent contractor experienced in works of this nature"; express exclusion of fitness-for-purpose |
| Uncapped indemnity | Indemnifies the employer against all losses arising from the works without limit | Liability policy limit applies regardless; the excess exposure is the business's | Cap at the contract sum or the insurance limit; carve out consequential loss |
| Insurance clause | Requires named covers, limits and terms — often "products liability including efficacy" or "PI covering fire safety" | A policy that does not match is a breach of contract from the first day; the principal contractor's own insurer will look to the subcontractor | Send the clause to the broker before signing; match the policy or amend the clause |
| Collateral warranties | Give funders, purchasers, tenants and management companies a direct contractual claim against the contractor | Each beneficiary is a potential claimant on the same limit; step-in rights and assignment multiply them | Limit beneficiaries; net contribution; limit assignments; match the warranty's duty to the contract's; no fitness-for-purpose in the warranty |
| Design responsibility | Passes design of the fire-stopping to the contractor, sometimes for the whole compartmentation strategy | Uninsured without design-and-construct PI with fire safety exclusions deleted | Limit design to product selection within tested detail; strategy remains with the designer; PI limit matched |
| Liquidated damages and delay | Fixed sums per week of delay, including delay caused by Gateway 3 refusal or remediation re-inspection | Pure economic loss — outside liability cover; outside PI unless caused by an insured design breach | Cap LDs; exclude delay caused by others' defects discovered during remediation |
| Retention and set-off | Employer may withhold sums against alleged defects | Not insurable; a cash-flow risk that drives contractor insolvency | Retention bond; clear defect-notification process; Legal Expenses contract-dispute section |
Underwriters read contracts as closely as certificates. A submission that includes the contractor's standard terms, its most onerous current warranty and the insurance clause from its largest contract tells the underwriter the business understands where its risk sits — and lets the broker match the policy to what the contractor has actually promised. Our construction insurance claims examples guide shows what happens when the two do not match.
What does passive fire protection contractor insurance cost — and what drives the premium?
| Rating factor | Why it moves the premium | What reduces it |
|---|---|---|
| Third-party certification and scope | The primary rating input; uncertified contractors are declined or heavily loaded; scope gaps mean partial deletion | FIRAS / IFC / BM TRADA / LPCB with scope matched to every activity |
| Activity mix | Internal fire-stopping rates lowest; coatings, ductwork and dampers higher; cavity barriers and external wall work highest; survey work adds PI exposure | Declare accurately; separate the activities the business can evidence from those it cannot |
| Building types and heights | Residential, higher-risk buildings, care and healthcare carry the highest consequence and the longest tail | Contract profile with heights, uses and share of higher-risk work |
| Remediation share | Inherited condition, occupied buildings and outcome warranties are priced above new-build | Survey scope discipline; warranty language negotiated; report templates that record limits |
| Installation records and product library | Reduce severity — the defence in any claim is the record | Photographed, labelled, logged installations; tested-detail library; non-standard referral log |
| Contract terms and warranties | Fitness-for-purpose, uncapped indemnities and multi-beneficiary warranties increase severity and the number of claimants | Standard terms and warranties reviewed; caps and net contribution in place |
| Design responsibility | The wider the design scope, the higher the PI rate and the more exclusions to delete | Design limited to product selection within tested detail; strategy with the designer |
| Claims, circumstances and defect notifications | A fire at a building the contractor worked on, or a survey finding its work wanting, is rated whether or not a claim followed | Full disclosure with the investigation outcome; show the process change |
| Subcontracted labour | Labour-only operatives are the contractor's for EL and competence; bona fide subcontractors need their own cover and certificate | Operative register; subcontractor certificates and insurance evidenced |
| Health and safety record | Work at height, COSHH and hot-work incidents drive EL and PL frequency | SSIP accreditation; RIDDOR history; hot-work permit system |
| Continuity and retroactive date | Gaps leave installed work uninsured under PI and signal instability | Continuous cover evidence; retroactive date to inception |
| Excess | Specialist markets trade a higher excess for a lower rate | Take a realistic excess the business can fund; costs-inclusive where affordable |
What do real passive fire protection claims look like — and how should you manage one?
Case study 1 — The hospital riser and the efficacy exclusion (composite, illustrative)
Situation: A FIRAS-certified fire-stopping contractor with £1.8m turnover sealed service penetrations in the risers of a hospital wing under a £240,000 subcontract. A fire in a plant room spread through a riser where a bundle of cables had been sealed with a product outside its tested field of application — the aperture exceeded the maximum in the manufacturer's evidence. Smoke affected two wards; 31 patients were moved; the NHS trust's insurer paid £2.6m for damage, decontamination and disruption and pursued the principal contractor, who passed the claim down. The subcontractor's policy had been placed the previous year with the efficacy exclusion deleted for its FIRAS scope and £2m of contractors' PI.
What we did: Notified both insurers on the day of the fire. The liability insurer accepted the claim within the efficacy deletion; the PI insurer accepted notification on the basis that the product choice for the oversized aperture was a design decision. The two insurers agreed a split. The contractor's installation records showed the penetration had been flagged as non-standard and referred to the site manager, who had instructed the contractor to proceed; the principal contractor's share of responsibility was established from that record.
Outcome: Settled at £640,000 against the contractor's £10m liability limit, split 70/30 between the liability and PI insurers; defence costs £110,000. The principal contractor bore a substantial share by contribution. Renewal: liability premium from £7,200 to £12,900 (+79%); PI from £2,400 to £4,100; no additional exclusion. The insurer noted that the referral record had halved the settlement.
Lessons: With the efficacy exclusion in place this claim would have been wholly uninsured — £640,000 plus costs from a £1.8m-turnover business. The non-standard referral log is the most valuable document a fire-stopping contractor keeps.
Case study 2 — The intumescent coating that was 40% thin (composite, illustrative)
Situation: A coatings contractor applied intumescent paint to the structural steel of a four-storey office building, working from a specification that gave the fire resistance period but not the dry film thickness. The contractor's estimator calculated the thickness from the manufacturer's tables using the wrong section factors for the primary beams. A pre-completion inspection by the client's fire engineer measured DFTs 40% below what the beams required. The client refused completion, engaged another contractor to over-coat, and claimed the cost, the delay and the professional fees. There was no fire.
What we did: Notified the contractors' PI insurer; the liability insurer was notified as a precaution but had nothing to respond to — no third-party damage. The PI insurer accepted the claim: the thickness calculation was a design act within the declared activities, and the fire safety exclusion had been deleted for intumescent coating at placement. The contractor's own rectification cost fell outside cover as its own work; the client's additional costs and delay were within it.
Outcome: PI paid £86,000 (over-coating by the replacement contractor, fire engineer's fees, part of the delay claim) plus £22,000 defence costs; the contractor bore £31,000 of its own abortive labour and materials. Renewal: PI from £3,100 to £5,600 (+81%) with a warranty that DFT calculations are checked against the manufacturer's assessment before application; liability unchanged.
Lessons: A coatings contractor that calculates thickness is a designer. Without PI, or with the fire safety exclusion in place, the client's claim would have been the contractor's own.
Case study 3 — The remediation report and the fire nine years later (composite, illustrative)
Situation: In 2017 a survey-and-remediate firm was engaged by a housing association to survey and remediate compartmentation in a 1970s eleven-storey block. Its report recorded 412 penetrations remediated and concluded that "compartmentation to all floors now achieves the required 60 minutes". In 2026 a kitchen fire on the seventh floor spread via an unrecorded service route behind a boxed-in riser that the survey had not opened. Four flats were damaged and residents were decanted for five months. The housing association's insurer paid £1.1m and pursued the firm under the Defective Premises Act, relying on section 135's thirty-year retrospective period, and in negligence, relying on the report.
What we did: The firm had ceased trading in 2023 and its director had let the PI lapse. Its products liability had been maintained in run-off on our advice; its PI had not, against it. The liability insurer accepted the fire damage claim within the efficacy deletion for the 2017 installation. The negligence claim on the report — the professional opinion that the whole compartment line performed — fell outside the liability policy's professional-advice exclusion and had no PI to respond to it.
Outcome: Liability run-off paid £420,000 for the fire damage attributable to the remediated penetrations' failure plus £68,000 defence costs. The report-based claim for the balance was pursued against the director personally under the DPA and settled at £95,000 from his own resources. The building liability order provisions were raised against the director's new company; the claim settled before an application was heard.
Lessons: The report outlived the business, the policy and the six-year period most contractors plan for. Products liability run-off paid for the installation; only PI run-off would have paid for the sentence that said the building was safe.
How to manage a passive fire protection claim — the eight-step process
- Notify liability and PI insurers the day you learn of a fire, a defect survey or a letter of claim. A fire at a building you worked on, a survey finding your work wanting, a principal contractor's pass-down or a Building Safety Regulator enquiry is a circumstance under both policies. Notify both in writing through your broker; late notification is the most common reason claims are declined.
- Preserve the complete installation record. Lock the photographs, labels, logs, product data sheets, batch records, referral log, drawings, handover pack and correspondence for the contract. Do not amend, annotate or re-issue anything. The record is the defence or the admission.
- Do not attend site to inspect or rectify without the insurers' agreement. An offer to re-do the work, an admission on site or an inspection without the adjuster can prejudice cover and the defence. Provide factual documents through the insurer's panel; leave liability to them.
- Establish which policy responds to which part of the claim. Third-party damage from the installation's failure is liability with the efficacy deletion; design, specification and survey elements are PI; rectification of your own work is neither. Have the broker map the claim to the policies early so the insurers agree a split rather than dispute it.
- Identify every other party who may share responsibility. The designer who did not detail the penetration, the principal contractor who instructed you to proceed, the manufacturer whose evidence was unclear, the other trades who breached your seals and the building owner who altered the building may each bear a share. Give the panel solicitor the names and the record.
- Notify legal expenses if a regulator or the HSE opens an enquiry. A Building Safety Regulator enquiry, an HSE investigation under CDM or a fire and rescue service interview is a regulatory matter. Legal expenses cover, or the D&O policy's regulatory-investigation section, funds representation; instruct through the insurer.
- Notify every related circumstance to the expiring policies before renewal. Other buildings where the same product, detail or operative was used, other contracts for the same client and any further correspondence belong to the policy in force when they were first known. List and notify them so the renewal policies' prior-circumstances exclusions do not leave them uninsured.
- Present the process change at renewal, not the excuse. Underwriters price recurrence. Show the referral procedure, the record system or the calculation check that changed as a result, with the date, and present the claim as closed with a lesson applied. Diary the claim for five years of disclosure and challenge the loading as clean years accumulate.
Glossary of passive fire protection and insurance terms
- ASFP
- The Association for Specialist Fire Protection — the trade body for passive fire protection manufacturers and contractors. Contractor membership requires third-party certification; the ASFP competency pathway sets operative levels.
- BS EN 1366
- The European test standard series for fire resistance of service installations — part 3 for penetration seals, part 4 for linear joint seals, parts 1 and 2 for ducts and dampers. Classification is to BS EN 13501-2. The tested configuration defines the product's field of application.
- Building liability order
- An order under sections 130–132 of the Building Safety Act 2022 by which the High Court makes a body corporate's liability for a building safety risk the liability of an associated company. Prevents restructuring or phoenixing from shedding the exposure.
- Cavity barrier
- A barrier installed within a concealed space — an external wall cavity, a ceiling void, a roof space — to close it against the spread of fire and smoke. In external walls it is subject to the cladding and external wall exclusions on most policies.
- Compartmentation
- The subdivision of a building into fire-resisting compartments by walls and floors, with every opening — door, service penetration, duct, joint — protected to maintain the compartment's fire resistance period. Passive fire protection is what maintains it.
- Contractors' PI / design-and-construct PI
- Professional indemnity written for contractors who make design, specification or survey decisions as part of construction work. The only cover for the fire-stopping installer's product selection, thickness calculation and remediation report.
- Dry film thickness (DFT)
- The thickness of an intumescent coating after curing, measured in microns. The thickness required for a given fire resistance period depends on the steel section factor and the manufacturer's assessment; calculating it is a design act.
- Efficacy exclusion
- A liability policy exclusion removing loss arising from the failure of a product, installation or system to perform the function for which it was designed or intended, where that function is to protect against loss. On fire protection work it removes the only claim the contractor will face; deletion for certified activities is the core of the placement.
- Field of application
- The range of configurations — substrate, aperture size, service type, annular gap, depth — within which a tested product's fire resistance classification applies. Installing outside it is installing an untested seal.
- FIRAS
- The UKAS-accredited installer certification scheme operated by Warringtonfire for passive and active fire protection contractors, covering fire-stopping, coatings, cavity barriers, ductwork, dampers, doors and partitions, with site audits and operative assessment. The certificate scope defines the insurance deletion.
- Golden thread
- The requirement under Part 4 of the Building Safety Act 2022 for accountable persons of higher-risk buildings to keep accurate, accessible, up-to-date building information throughout the building's life. The contractor's installation records form part of it.
- IFC Certification
- A UKAS-accredited certification body operating installer schemes for passive fire protection and fire doors, accepted as equivalent to FIRAS by underwriters and principal contractors.
- Intumescent coating
- A paint or mastic that expands when heated to form an insulating char, applied to structural steel to achieve a fire resistance period. Rated by underwriters as fire protection, not decoration.
- Penetration seal
- A fire-stopping system — batt, mastic, collar, wrap, pillow or mortar — installed where services pass through a compartment wall or floor to restore its fire resistance. The most common passive fire protection installation and the most common claim.
- Regulation 38
- The Building Regulations 2010 requirement that fire safety information be given to the responsible person on completion of a building to which the Fire Safety Order applies. The contractor's as-built fire-stopping records are part of that information.
- Remediation contribution order
- An order of the First-tier Tribunal under section 124 of the Building Safety Act 2022 requiring a developer, landlord or associated person to contribute to the cost of remediating relevant defects. Drives recovery claims down the supply chain.
- Section 135 limitation
- The Building Safety Act 2022 provision extending the limitation period for Defective Premises Act 1972 claims to fifteen years prospectively and thirty years retrospectively from 28 June 2022. The passive fire protection contractor's run-off horizon for dwelling-related work.
Frequently asked questions
Public and products liability with the efficacy exclusion deleted for certified activities, employers' liability, contractors' professional indemnity or a design-and-construct policy for specification and survey work, contract works and tools, and legal expenses with regulatory scope. Directors' and officers' cover is added where the contractor works on higher-risk buildings. The efficacy deletion and the PI are the two elements a standard contractors' package does not provide.
The efficacy exclusion removes liability arising from the failure of a product, installation or system to perform the function for which it was intended, where that function is to protect against loss. Fire-stopping only ever causes a loss by failing to stop a fire, so a policy with the exclusion in place does not cover the contractor's core risk at all. Specialist markets delete it for named, third-party certified activities; the deletion is the whole point of the placement.
Yes, in almost every case. Choosing the product, the configuration and the depth for a penetration the drawings did not detail, judging whether a service arrangement is within a tested field of application, calculating intumescent thickness or writing a remediation report are all design or professional acts. They are excluded by the liability policy's professional-advice exclusion and covered only by contractors' PI or a design-and-construct policy with the fire safety exclusion deleted.
Specialist markets treat third-party installer certification — FIRAS, IFC Certification, BM TRADA Q-Mark or LPCB — as the primary underwriting evidence, and most decline uncertified passive fire protection contractors or leave the efficacy exclusion in place. The certificate's scope defines which activities the exclusion is deleted for, so the scope must match every activity the business undertakes.
It must be rated as fire protection. A coatings contractor whose policy describes the activity as painting and decorating is both misdescribed and subject to the efficacy exclusion when the steel fails early in a fire. Intumescent work needs the efficacy deletion for coating scope, contractors' PI for dry film thickness calculation and checking, and a hot-work warranty the business can meet.
In contract six years from breach or twelve under a deed; in negligence six years from damage or three from knowledge with a fifteen-year longstop; and under the Defective Premises Act, since section 135 of the Building Safety Act 2022, fifteen years from completion for dwelling-related work and thirty years for work completed before 28 June 2022. Because the damage is usually a fire that may occur years later, the practical exposure runs to the longstop.
Yes, on two bases. Liability cover is occurrence-based, so a fire after the business closes is covered only if a policy is in force on the date of the fire — products liability run-off provides that. Professional indemnity is claims-made, so a claim arriving after closure is covered only by PI run-off. Six years is the minimum and fifteen the prudent horizon for dwelling-related work. Budget it from the first year; it is far harder to buy after a gap or a decline.
Only if both the efficacy exclusion and the external wall or cladding exclusion have been deleted for the activity, and the certificate scope covers cavity barriers. Most contractors' liability and construction PI policies retain the cladding exclusion, so cavity barrier remediation on residential blocks — the fastest-growing area of passive fire protection work — is uninsured under them. Extend the certificate scope and endorse the policy before the first job.
Under sections 130–132 of the Building Safety Act 2022 the High Court can make a company's liability for a building safety risk the liability of an associated company — a group company, a company under common control or a successor. A contractor cannot shed liability for defective fire-stopping by restructuring, selling the trade or letting the original company go. The liability and PI policies, maintained in run-off, are the only protection.
It is rated higher. Remediation means inheriting an unknown building, working around occupants, and issuing a report that says the compartmentation now performs — a professional opinion on the whole compartment line, including penetrations the survey did not find. Underwriters price the inherited condition, the occupied-building liability, the external wall overlap and the warranty language funders and developers require. PI covering survey and report is essential.
Reasonable skill and care, not fitness for purpose; a liability cap and a net-contribution clause; design responsibility limited to product selection within tested detail; an insurance clause that matches the policy actually held; and collateral warranties with limited beneficiaries and no outcome guarantees. Fitness-for-purpose obligations and uncapped indemnities are excluded by the contractual-liability exclusion on both liability and PI wordings and sit with the business.
Look for a broker whose first questions are your certificate scope, your installation records and which of fire-stopping, coatings, cavity barriers, ductwork, dampers and survey you do — not just your turnover — and who places through Lloyd's and specialist MGA markets with fire protection appetite rather than package schemes. Miller & Partner places passive fire protection contractors using The Insurability Framework, with the efficacy exclusion deleted for certified work, contractors' PI alongside and run-off planned from the outset.
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