High-Risk Trades Insurance: Demolition & Hot Works
High-Risk Trades Insurance: The Definitive UK Guide for Hot Works, Work at Height & Demolition (2026)
Why do high-risk trades need specialist insurance treatment?
Some trades are declined the moment an underwriter reads the activity description. Hot works, work at height and demolition are the three classic examples — activities so closely tied to catastrophic loss that standard insurers and comparison panels rule them out automatically, regardless of how well the business is actually run.
That automatic rejection is the problem we solve every week at Miller & Partner. These trades are not uninsurable — but they are emphatically "non-standard". A welder, a roofer, a steeplejack, a demolition contractor or a multi-trade firm that does any of these activities will find the mainstream market closes the door before a human ever assesses the risk. The result is a frustrating loop of declines and "refer to underwriter" responses that has little to do with the contractor's safety record.
This guide takes a different angle to our single-trade guides. Rather than covering one trade, it organises around the three hazard classes that actually drive the declines — hot works, work at height and demolition — because these cut across dozens of trades. A roofer faces height risk; a welder faces hot-works fire risk; a groundworks contractor doing enabling demolition faces all three. Understanding the hazard, not just the job title, is how you present the risk so it can be placed. It sits alongside our guides on demolition contractor insurance, welding and fabrication insurance, and roof inspection insurance.
The stakes are real and current. HSE's latest figures show 124 workers were killed in work-related incidents in 2024/25, with construction recording the highest number of any sector at 35 deaths — and falls from height the single biggest cause across all industries. Hot works caused 182 building fires in England in the same year, with welding and cutting responsible for the overwhelming majority. Those are exactly the numbers underwriters have in mind when they price — or decline — a high-risk trade. Get the presentation right, and the door that looked closed opens.
Key facts at a glance
- 124 workers were killed in work-related incidents in Great Britain in 2024/25 (HSE); construction had the highest total of any sector at 35 deaths.
- Falls from height are the single biggest cause of workplace death — 35 fatalities in 2024/25, over a quarter of the total.
- Construction's fatal-injury rate runs at roughly 4.8 times the all-industry average, largely driven by work at height.
- 182 hot-works fires hit buildings in England in 2024/25, with welding and cutting the ignition source in around 85% of them.
- The Work at Height Regulations 2005 apply at any height where a fall could cause injury — there is no minimum threshold.
- HSE penalties for serious breaches are unlimited fines and up to 2 years' imprisonment; fatal-fall cases have exceeded £1 million in fines.
- Most high-risk trade policies carry hot-works warranties and height conditions — breach them and the claim can be declined even though cover was in force.
How do standard and high-risk trades insurance compare?
The clearest way to understand the treatment of a high-risk trade is to see how it differs from a standard one. The contractor may be excellent; the hazard class is what changes everything:
| Factor | Standard trade (e.g. general builder) | High-risk trade (hot works / height / demolition) |
|---|---|---|
| Market access | Full standard panel and comparison sites | Standard panel auto-declines; Lloyd's and specialist MGAs needed |
| Underwriting route | Largely automated | Individually referred to a human underwriter |
| Premium basis | Standard rate on turnover/wage roll | Loaded for hazard; height %, hot-works %, depth, and demolition value rated separately |
| Policy warranties | Few or none | Hot-works permit warranty, height conditions, subcontractor conditions |
| Information required | Basic proposal | Method statements, RAMS, training records, height %, max depth/height |
| Liability limits | £1m–£2m PL typical | £5m–£10m PL often demanded by contracts and insurers |
| Excess | Standard | Higher, sometimes peril-specific (e.g. fire-damage excess on hot works) |
How does The Insurability Framework™ place a high-risk trade?
Placing a hot-works, work-at-height or demolition contractor is exactly what The Insurability Framework was built for. It is our structured method for turning a trade that standard markets reject on sight into one a specialist underwriter can confidently quote. Here is how each of the four pillars applies.
Underwriter Intelligence
We know which Lloyd's syndicates and MGAs have genuine appetite for hot works, height and demolition — and exactly what evidence (RAMS, permits, training) moves their decision from decline to quote. We present to the right desk first.
Difficult Risk Expertise
High-hazard trades are our core business, not an exception. We routinely place demolition, steeplejacks, roofers, welders and multi-trade firms that mainstream panels decline automatically.
Risk Assessment
We identify the hidden exposures an underwriter fears — working depth, fragile roofs, hot-works near combustibles, subcontractor chains — and build a presentation that answers each one before it is asked.
Claims Advocacy
When a fire, fall or third-party-damage claim comes, real people handle it — and crucially, help you evidence warranty compliance so the claim is paid rather than disputed.
Why do standard insurers decline hot works, height and demolition risks?
A decline rarely means a trade is genuinely uninsurable. It means the activity sits outside the narrow, automated appetite of a standard insurer. The reasons are mechanical rather than moral:
- Catastrophe potential. A single hot-works fire or fall can produce a six- or seven-figure claim. Standard insurers price for predictable, attritional losses — not low-frequency, high-severity events.
- Algorithmic underwriting. Comparison panels price by model. An activity such as "demolition" or "work above 10 metres" triggers an automatic decline — no human reads the safety case.
- Reinstatement and third-party exposure. Hot works and demolition routinely threaten neighbouring property and the public, multiplying the potential claim well beyond the contractor's own site.
- Warranty management burden. These risks need active warranty oversight (permits, RAMS, sign-off) that standard insurers are not set up to administer — so they decline rather than manage.
If your trade has already been turned away, the route back is the same one we use for any adverse risk: re-present to a market with the right appetite. Our guides on insurance for businesses refused cover and choosing a specialist adverse-risk broker walk through that process.
Hazard 1: Why do hot works trigger fire claims and declines?
"Hot works" means any activity generating heat, sparks or flame — welding, cutting, grinding, brazing, soldering, the use of blowtorches and angle grinders. It is one of the most common causes of serious commercial fires precisely because the ignition source is mobile, the heat is intense, and combustible materials are often nearby. HSE and fire-service data attribute 182 building fires in England in 2024/25 to hot works, with welding and cutting the ignition source in around 85% of them.
For underwriters, the fear is twofold: the fire damages the contractor's work and the client's property (a first- and third-party loss), and a smouldering fire can ignite hours after the work stops — the classic reason hot-works warranties demand a fire-watch period after completion. This is why almost every policy covering hot works attaches a hot-works warranty: a permit-to-work system, removal or protection of combustibles, suitable extinguishers to hand, and a continuous fire watch for a set period (typically 60 minutes) after work ends.
From recent placement conversations
"The single most expensive mistake I see with hot works isn't the fire itself — it's the warranty breach. A contractor has perfectly good cover, but the operative skipped the post-work fire watch or didn't complete the permit. The fire starts 40 minutes after they've packed up, and the insurer points to the unmet warranty. The cover was there; the compliance wasn't."
"When we place a hot-works risk, we spend as much time on the client's permit system as on the premium — because a warranty you can't evidence is a claim you won't get paid."
Hazard 2: Why is work at height the deadliest exposure?
Falls from height are the single biggest cause of workplace death in Great Britain — 35 fatalities in 2024/25, more than a quarter of all worker deaths. Roofers, scaffolders, steeplejacks, gutter and cladding contractors, solar installers, window cleaners and tree surgeons all carry this exposure, and so does any general trade that goes up a ladder or tower. The Work at Height Regulations 2005 apply at any height where a fall could cause injury — there is no minimum threshold, so a fall from a stepladder is in scope just as much as a fall from a roof.
The regulations require a "hierarchy of control": avoid work at height where possible, then prevent falls (using guard rails, working platforms), then mitigate the consequences (nets, harnesses). Underwriters assessing a height risk look hard at three things: the percentage of work conducted at height, the maximum height worked, and the access method (MEWP and scaffold rate far better than ladders). A roofer who works mainly from scaffold with documented method statements is a very different risk from one relying on ladders — even though both are "roofers".
Beyond the human cost, the financial exposure is severe: HSE penalties for serious breaches are unlimited, and fatal-fall prosecutions have produced fines exceeding £1 million. That liability — to employees under Employers' Liability and to the public under Public Liability — is exactly what the insurance programme has to respond to.
Hazard 3: Why is demolition the hardest trade to place?
Demolition combines almost every high-risk factor at once: work at height, hot works (cutting steel), heavy plant, structural collapse risk, asbestos and other hazardous materials, dust, vibration, and acute third-party exposure to neighbouring buildings and the public. It is widely regarded as one of the most hazardous activities in construction, and it is the trade standard insurers are quickest to decline. Our dedicated demolition contractor insurance guide covers the trade in depth; here we focus on why it sits at the top of the hazard scale.
Demolition is tightly governed by the Construction (Design and Management) Regulations 2015, which impose duties on clients, principal designers and principal contractors across the whole project, plus a specific requirement that demolition or dismantling be planned and carried out under the supervision of a competent person. Asbestos adds a further regime under the Control of Asbestos Regulations. For underwriters, the combination of structural collapse risk and third-party property exposure means demolition almost always requires Lloyd's or specialist MGA capacity, higher liability limits (£5m–£10m+ is common), and detailed method statements for every project. It frequently sits alongside contractors' all risks and plant cover, and the placement itself is set out on our demolition insurance page. Where the same firm also breaks ground, groundworks insurance covers the underground services and removal-of-support exposures that attach alongside it.
Cover checker: what does your high-risk trade need?
Select a trade to see its cover priorities and where a specialist placement is typically needed. For tailored advice, explore our contractors' combined cover.
Select a trade above to see cover priorities and specialist-placement flags.
What HSE regulations govern high-risk trades in 2026?
High-risk trades operate under a dense regulatory framework. Underwriters expect you to know it, and compliance evidence is central to a strong presentation. The key instruments are:
- Health and Safety at Work etc. Act 1974 — the overarching duty to ensure, so far as reasonably practicable, the health and safety of employees and others affected by the work.
- Work at Height Regulations 2005 — planning, supervision, competence and the hierarchy of control for all work at height, at any height.
- CDM Regulations 2015 — duties across construction projects including demolition, with a competent-person supervision requirement for demolition and dismantling.
- Regulatory Reform (Fire Safety) Order 2005 — fire risk assessment duties relevant to hot works on occupied or commercial premises.
- PUWER 1998 and LOLER 1998 — safe provision and use of work equipment and lifting equipment, central to plant-heavy and height trades.
You can find the HSE's free practical guidance on these duties at hse.gov.uk. From an insurance perspective, the documents that prove compliance — risk assessments, method statements (RAMS), permits, training certificates — are also the documents that make your risk placeable.
What policy warranties and conditions must you comply with?
This is where high-risk trade cover most often fails at claim stage. A warranty is a promise in the policy that you will do (or not do) something; under the Insurance Act 2015, breach of a warranty now suspends cover for the duration of the breach rather than voiding the policy entirely — but if a loss occurs while the warranty is breached, the claim is not paid. The common warranties on high-risk trade policies are:
- Hot-works warranty — permit-to-work system, combustibles removed or protected, extinguishers to hand, and a fire watch (commonly 60 minutes) after work ends.
- Height conditions — appropriate access equipment, no work above a stated height without referral, harness/edge-protection requirements.
- Heat away from premises / working depth warranties — limiting the most hazardous activities or requiring notification above set thresholds.
- Subcontractor conditions — requiring subcontractors to hold their own cover with matching limits, and to work to your method statements.
Are you ready to present a high-risk trade to underwriters?
Tick each item you have ready. The more you can present, the better the terms a specialist underwriter can offer. A green check is a point in your favour; an empty box is a gap to close before approaching the market.
What must you disclose about high-risk activities?
Under the Insurance Act 2015, commercial buyers must make a fair presentation of the risk — disclosing every material circumstance they know or ought to know, clearly and accessibly. For high-risk trades, the activities themselves are the most material facts of all. The most damaging — and most common — mistake is under-declaring the hazardous portion of the work to get a cheaper quote.
If a roofer declares "general building" to avoid a height loading, or a contractor omits the occasional demolition job, any claim arising from the undisclosed activity can be reduced or declined. The duty extends to: every hazardous activity (even occasional ones), the percentage split between standard and high-risk work, maximum heights and depths worked, hot-works undertaken, use of subcontractors, and your full claims history. The safe course is full disclosure, built with your broker — under-declaring to save premium is the costliest false economy in high-risk trade insurance.
Risk assessor: how placeable is your trade right now?
Choose the two factors that best describe your work for an indicative read on how the market is likely to view you today. This is a guide only, not a quote.
Select both factors to see an indicative placeability read.
What drives the cost of high-risk trades insurance?
Pricing a high-risk trade is not a single number — it is the sum of a dozen rating factors, most of which you can influence. The table below sets out the main drivers and the practical mitigation for each.
| Rating factor | Why it raises premium | Mitigation |
|---|---|---|
| Hazard class | Hot works, height and demolition each carry catastrophe potential | Declare accurately; present the controls that reduce each hazard |
| Percentage of work at height | More time at height means higher fall exposure | Document the split; show low-risk access methods (scaffold/MEWP) |
| Maximum height worked | Severity rises sharply with height | State your genuine maximum; refer higher one-off jobs separately |
| Hot-works activity | Fire risk to own work and third-party property | Operate a permit system with fire watch; evidence it |
| Demolition / structural work | Collapse and third-party property exposure | CDM competent-person supervision; project method statements |
| Liability limit required | Higher limits cost more but are often contract-mandated | Right-size to genuine and contractual exposure |
| Turnover and wage roll | The base on which liability premium is calculated | Declare an accurate activity split so hazardous work is rated separately |
| Subcontractor use | Labour-only and bona-fide subcontractors carry different exposures | Require subcontractors to hold matching cover; document it |
| Claims history | Prior fire or injury claims rate hard | Provide root-cause notes and the controls introduced since |
| Training and competence | Absence of records is priced as worst-case | Supply CSCS/CPCS, IPAF/PASMA, asbestos-awareness certificates |
| RAMS quality | Generic risk assessments invite caution | Provide site-specific method statements matched to the work |
| Excess accepted | A low excess transfers more loss to the insurer | Accept a sensible voluntary excess to signal confidence and cut premium |
From recent broker conversations
"The biggest lever on a high-risk trade premium is almost always the activity split. A firm that does 80% standard joinery and 20% roofing is often quoted as if it were 100% roofing — because the proposal didn't break it out. Document the split honestly and the rate on the standard work comes right down, with only the genuinely high-risk portion loaded."
Three real claim case studies: how high-risk trade losses play out
These fictionalised but realistic examples show how the three hazard classes produce claims, and what determines whether they are paid. The patterns are ones we see regularly.
Case study 1 — "Calderwood Fabrication": the hot-works warranty breach
Situation: A welding contractor was cutting steel inside a client's warehouse. The operative completed the job and packed up without the 60-minute fire watch required by the policy's hot-works warranty. A smouldering ember ignited stored packaging around 45 minutes later.
Claim type: Public Liability (third-party fire) plus Contract Works.
The numbers: Warehouse and stock damage £310,000. The insurer initially declined, citing breach of the hot-works warranty at the time of loss.
What changed it: The contractor could produce a permit-to-work system and training records showing fire watch was standard procedure, and evidence that this was an isolated operative lapse rather than an absent system. After broker advocacy the insurer settled at a reduced figure under a negotiated position, but the shortfall was painful.
Lesson: the cover was adequate; the compliance failed. A logged fire watch on the day would have made this a clean, full settlement.
Renewal impact: +70% at the following renewal with a tightened hot-works warranty and a fire-damage excess; settling toward +25% over two clean years.
Case study 2 — "Aldgate Roofing": the fall from height
Situation: A roofing operative fell through a fragile rooflight on a commercial re-roofing job, suffering serious injuries. The HSE investigated and the operative brought an Employers' Liability claim.
Claim type: Employers' Liability (personal injury) plus HSE enforcement.
The numbers: EL settlement £240,000; HSE fine following prosecution £85,000; defence and legal costs £40,000.
What changed it: The firm's method statement had identified fragile surfaces but the crew had not deployed the required crawl boards and edge protection on the day. The EL policy responded to the injury settlement; the HSE fine was uninsurable as a matter of public policy, but the legal-expenses element funded the defence.
Lesson: fragile-roof and edge-protection controls are the textbook fall exposure. The injury claim was insurable; the fine was not — which is why the controls matter as much as the cover.
Renewal impact: +90% at first renewal with a fragile-surfaces condition added; the firm invested in refreshed height training and the loading eased over time.
Case study 3 — "Severn Demolition": the third-party collapse
Situation: During the dismantling of a terraced commercial unit, a party wall was compromised and the neighbouring building suffered structural damage, forcing its temporary closure.
Claim type: Public Liability (third-party property damage and consequential loss).
The numbers: Neighbouring building repairs £180,000; the occupier's business interruption claim £95,000; total £275,000 against a £5m PL limit.
What changed it: The contractor's CDM documentation, structural survey and method statement showed a competent-person supervision regime was in place, and the cause was a latent defect in the shared wall rather than a planning failure. The claim was paid; the documentation was the difference between a clean settlement and a contested one.
Lesson: demolition's defining exposure is third-party property. Adequate limits (£5m+) and CDM-compliant documentation are non-negotiable.
Renewal impact: +55% at renewal; the contractor moved to a Lloyd's-backed demolition scheme that priced the documented risk more keenly than the original market.
How do you manage a high-risk trade claim to protect cover and insurability? (8 steps)
How you handle an incident shapes both whether this claim is paid and what your next renewal looks like. On high-risk trades, evidencing warranty compliance is as important as the notification itself.
- Make the scene safe. Secure the area, account for everyone, and prevent further injury or fire spread. Call emergency services where needed. Safety comes before any insurance step.
- Notify immediately. Tell your broker or insurer as soon as you are aware of an incident or circumstance — even if you are unsure whether you will claim. Late notification can prejudice the claim.
- Preserve warranty-compliance evidence. Gather the permit-to-work, fire-watch log, RAMS, training records and sign-offs relevant to the activity. On high-risk trades this evidence is what gets the claim paid.
- Preserve physical evidence. Photograph the scene, equipment and damage; keep damaged items; record witness names before the scene changes.
- Do not admit liability. Report facts only. Admitting fault can prejudice the insurer's position and your defence; leave liability decisions to the claims handler.
- Manage HSE engagement carefully. If the HSE investigates, engage your legal-expenses insurer immediately. Cooperate factually but do not give written statements without representation — an investigation can become a prosecution.
- Document the root cause. Record what caused the incident and start a corrective action. This becomes your risk-improvement narrative at the next renewal.
- Update your presentation and controls. Add the claim and corrective action to your loss summary and tighten the control that failed, ready to disclose accurately at renewal.
John Miller — Director & Principal Broker
John has 13+ years' specialist commercial broking experience and built Miller & Partner's high-hazard practice around exactly this problem: placing hot-works, work-at-height and demolition trades that standard insurers decline on sight. Former #1 Account Executive at Brown & Brown and #1 Salesperson at AXA, he works directly with Lloyd's syndicates and specialist MGAs to present high-risk trades fairly — and to help contractors build the warranty-compliance evidence that gets claims paid. Read John's full profile.
Glossary: high-risk trades insurance terms
- Hot works
- Any activity producing heat, sparks or flame — welding, cutting, grinding, brazing, soldering, blowtorch and angle-grinder work — carrying a significant fire risk.
- Hot-works warranty
- A policy condition requiring a permit system, removal/protection of combustibles, extinguishers to hand, and a fire watch (commonly 60 minutes) after work ends. Breach can mean an unpaid claim.
- Fire watch
- A period of monitoring after hot works finish, to catch a smouldering fire before it spreads. A logged fire watch is key warranty-compliance evidence.
- Work at height
- Work in any place where a person could fall a distance liable to cause injury. The Work at Height Regulations 2005 apply at any such height — there is no minimum threshold.
- Hierarchy of control
- The Work at Height duty to first avoid working at height, then prevent falls, then mitigate their consequences — in that order.
- MEWP
- Mobile Elevating Work Platform (e.g. a cherry picker or scissor lift). A safer access method than ladders, and one underwriters rate more favourably.
- RAMS
- Risk Assessments and Method Statements — the documents setting out the hazards of a task and the safe system of work. Central to both compliance and insurability.
- CDM 2015
- The Construction (Design and Management) Regulations 2015, governing health and safety across construction projects, including demolition and dismantling.
- Permit to work
- A formal documented authorisation for a hazardous task (such as hot works), specifying the controls that must be in place before work begins.
- Warranty (insurance)
- A promise in the policy to do or not do something. Under the Insurance Act 2015, breach suspends cover during the breach; a loss occurring while breached is not paid.
- Contractors' all risks (CAR)
- Cover for the works in progress, materials and temporary structures against damage — often paired with liability on construction and demolition projects.
- Public Liability (PL)
- Cover for injury to third parties or damage to their property arising from your work — the cover most tested by hot works, falling objects and collapse.
- Employers' Liability (EL)
- Legally required cover (if you employ staff) for injury or illness sustained by employees in the course of their work.
- MGA (Managing General Agent)
- A specialist intermediary with delegated authority to underwrite on an insurer's behalf, often the route to capacity for high-hazard trades.
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