Chimney Sweep and Flue Lining Insurance
Solid fuel work shares a feature with gas: the worst outcome is not a cost, it is a household that does not wake up.
Carbon Monoxide And Fire, Not Cost
A blocked, cracked or badly lined flue can put carbon monoxide into a room rather than out of a chimney. A flue with inadequate clearance to combustible material, or a stove installed too close to a hearth or a beam, can start a fire inside a structure where nobody sees it until it is established. And a chimney that has not been swept properly can catch alight with a quantity of deposit that is genuinely dangerous.
The second thing is paperwork. A sweep certificate and a commissioning certificate are documents other people rely on: an insurer accepting a household risk, a landlord discharging a duty, a homeowner believing the appliance is safe. Issuing one is a professional act rather than an administrative one.
What Chimney and Flue Lining Insurance Covers
Public liability
Injury and damage in occupied homes, including fire and carbon monoxide exposure arising from your work. £2 million is a bare minimum on this trade and £5 million is the sensible position, because the exposure is a household rather than a room.
Products liability where you supply
Where you supply the liner, the stove or the components as well as fitting them, a failure in the product is yours before it is the manufacturer's.
Professional indemnity for certificates and reports
A sweep certificate, a CCTV survey report or a commissioning certificate is relied on by insurers, landlords and homeowners. A certificate that was wrong is an advisory failure. Mechanics on our professional indemnity page.
Damage to the property
Soot and smoke damage to decoration and furnishings, damage to hearths, plaster and chimney breasts, and water ingress after capping or cowling work.
Employers' liability
Compulsory from the first employee at a £5 million statutory minimum, with roof access, confined working and dust the main hazards.
Working at height and roof access
Capping, cowling, flue terminals and relining from the top all require roof access, and the permitted height and method need to match what you do.
Tools and equipment in transit
Rods, cameras, vacuums and liner coils in a van, with the usual overnight vehicle condition.
Where The Cover Stops
Wordings differ between insurers, so treat these as the usual position rather than as universal fact. Where one of them matters to you, it is worth checking on your own schedule before you need to.
Work outside your certification
Solid fuel installation generally requires competence under a recognised scheme, and building regulations compliance follows from it. Work you were not certificated for gives an insurer a straightforward reason to decline.
Carbon monoxide claims
The most serious realistic claim. It will be assessed on the flue integrity, the clearances, the ventilation provision and the commissioning record, and it may arrive long after the installation.
The certificate as a professional statement
A sweep certificate issued without a proper inspection, or a survey that missed a crack or a bridged flue, is a document relied on by others. That is not covered by public liability.
Soot and smoke damage
A high frequency claim that is almost always preventable with sheeting and a proper vacuum, and frequency moves a premium in this trade more than severity.
Pre-existing chimney defects
You are usually working on a structure a century old. Establishing what was already cracked, bridged or parged badly before you started is the whole of any later argument.
Appliances supplied by the customer
Fitting a stove the customer bought online, possibly without the right certification for the building, changes your position and needs recording.
The Commissioning Record Is The Whole Defence
If a carbon monoxide or fire claim ever arises from an installation, the investigation will go straight to what was recorded at commissioning, and in this trade that record is frequently thin.
What matters is specific: the flue integrity and the result of a smoke or pressure test, the clearances to combustible material in all directions including behind and above, the hearth construction and dimensions, the ventilation provision for the appliance size, the carbon monoxide alarm fitted and tested, and the notice plate completed and left in the property. A certificate that says the installation complies, with none of those values recorded, proves very little.
So the habit is measurement and photographs: the clearances with a tape in shot, the hearth, the register plate and seal, the liner at the terminal, and the alarm. It takes a few minutes per job and it is the difference between a defensible position and an argument. Where a customer declines something you recommended, a carbon monoxide alarm being the common one, record the refusal in writing.
The Certificate Is A Professional Document
Sweeps and surveyors in this trade issue paperwork other people make decisions on, and that is a professional exposure rather than a trade one.
A household insurer may accept a risk, or settle a fire claim, on the basis that the chimney was swept and certified. A landlord may discharge a duty by holding a certificate. A homeowner buying a house may rely on a flue survey. If a certificate was issued without a proper inspection, or a CCTV survey missed a crack, a bridged flue or a chimney shared with a neighbour, the people who relied on it have a claim for the consequences and nothing was physically damaged by you at the time.
Public liability does not answer that; professional indemnity does. So two things are worth doing. Carry the cover if you issue certificates or survey reports. And write them honestly: say what was inspected and what could not be seen, note defects found and recommendations made, and avoid certifying a flue as sound when what you mean is that nothing was visible from the parts you could reach.
Soot Is The Claim You Will Actually Have
Carbon monoxide is the claim that matters and soot is the claim that happens, repeatedly, and it drives premiums in this trade more than anything else.
A sweep without proper sealing puts soot into a room with light carpets, cream sofas and curtains, and the cost of cleaning or replacing them is out of all proportion to the job. The same applies to removing an old liner, breaking out a register plate, or working above a lounge while somebody has left a door open. None of it is dramatic and all of it is chargeable.
The controls are completely standard and skipping them under time pressure is what causes the claims: sheet the hearth and the floor, seal the opening properly before any disturbance, use a vacuum rated for soot rather than a workshop one, close internal doors, and ask the householder to move soft furnishings rather than working around them. Photograph the room before you start, because an existing mark on a cream sofa will otherwise become yours.
You Are Working On A Victorian Structure
Most chimneys being lined or swept were built long before the appliances now connected to them, and their condition is unknown until you are inside.
A stack may be cracked, parged badly, shared with the house next door, bridged by debris, or have had a previous liner installed around a bend it should not have taken. Relining can disturb all of it, and the householder will see a chimney that was fine on Monday and is now smoking or leaking.
Which is why a CCTV survey before relining is worth the hour rather than a cost to be saved, and why recording what it showed matters as much as doing it. Where a stack needs rebuilding or repointing before a liner will work, say so in writing and decline the lining rather than fitting it and hoping. And where a flue turns out to be shared, stop, because connecting an appliance to a shared flue is a carbon monoxide risk to a household that is not even your customer.
How To Choose A Broker For Chimney Work
The obvious cover is public liability and the missing one is usually professional indemnity. We are an FCA regulated broker and will not tell you we are the best choice. These are the questions that decide it.
Is professional indemnity included for certificates and surveys?
If you issue sweep certificates, commissioning certificates or flue survey reports, those are documents others rely on and public liability does not answer them.
Is the limit sized against a household?
£2 million is a bare minimum on a trade where the worst outcome is carbon monoxide or a house fire. £5 million is the sensible position.
What certification does the policy assume you hold?
Solid fuel installation requires competence under a recognised scheme, and work outside it is a straightforward decline. Make sure the schedule matches what you are certificated for.
Is products liability included where you supply stoves and liners?
Supplying as well as fitting makes you a supplier, and a product failure arrives as yours first.
What height and roof access are permitted?
Capping, cowling and relining from the top is roof work, and the permitted height and method should match what you actually do.
Has soot damage frequency been discussed?
It is the claim you will actually have and frequency moves this premium more than severity. A broker talking about sealing and vacuums is thinking about your renewal.
Factually, here is what we do against those questions. We include professional indemnity where you issue certificates or survey reports rather than leaving that uncovered, we size the limit against a household rather than a room, we check the schedule matches the certification you actually hold, and we ask the height you work to and whether you access roofs. We are a broker, so it goes to several insurers rather than one.
We also insure heating and gas engineers, roofers and steeplejacks, so flues, carbon monoxide and roof access are familiar ground here. Industrial stacks and spires sit on the steeplejack page rather than this one.
What Moves The Price
Every policy is priced on the business behind it. These are the things that move the premium:
- Whether you install as well as sweep, and your certification
- Whether you issue certificates or survey reports
- Whether you supply stoves and liners or fit customer-supplied
- The height you work to and whether you access roofs
- Turnover and the number of installations a year
- The limit of indemnity you carry
- Soot and smoke damage claims frequency
- Any carbon monoxide or fire incidents, however long ago
We are a broker, so we take it to several insurers rather than quoting one. Call 02382 000820 for a quote.
What We Need To Quote
- Whether you sweep, line, install, or all three
- Certification held, and for which appliance types
- Whether you issue sweep or commissioning certificates
- Whether you carry out CCTV flue surveys and issue reports
- Whether you supply appliances or fit customer-supplied
- The height you work to and your roof access method
- The limit of indemnity required
- Any claims, including soot damage and any CO or fire incident
Cover that often goes with this
The gaps we most often find sitting next to this policy.
- Heating and gas engineersThe same carbon monoxide exposure, on a different fuel.
- SteeplejacksIndustrial stacks and spires rather than domestic flues.
- Roofing contractorsCapping, flashing and the stack itself.
- Professional indemnityCertificates and survey reports others rely on.
- BricklayersStack rebuilds and repointing before a liner will work.
- Talk to a brokerAsk us whether your certificates are actually covered.
Common questions
What insurance do chimney sweeps and flue liners need?+
Public liability at a limit sized against a household rather than a room, which means £2 million as a bare minimum and £5 million as the sensible position, because the worst outcome on this trade is carbon monoxide or a house fire. Professional indemnity if you issue sweep certificates, commissioning certificates or flue survey reports, since those are documents other people rely on. Products liability where you supply stoves and liners. Employers' liability at a £5 million statutory minimum, plus working at height declared for capping and relining from the top.
Do I need professional indemnity as a chimney sweep?+
If you issue certificates or survey reports, yes, and it is the cover most often missing. A household insurer may accept a risk or settle a fire claim on the basis that a chimney was swept and certified. A landlord may discharge a duty by holding a certificate. A buyer may rely on a flue survey. If a certificate was issued without a proper inspection, or a survey missed a crack, a bridged flue or a flue shared with a neighbour, the people who relied on it have a claim for the consequences, and nothing was physically damaged by you, so public liability does not answer it.
What happens if carbon monoxide enters a property after my work?+
It is the most serious realistic claim in the trade, and the investigation will go straight to what was recorded at commissioning. That means flue integrity and the result of a smoke or pressure test, clearances to combustible material in all directions including behind and above, the hearth construction and dimensions, ventilation provision for the appliance size, the alarm fitted and tested, and the notice plate. A certificate saying the installation complies, with none of those values recorded, proves very little. Photograph clearances with a tape in shot, and record any recommendation a customer declined.
Am I covered for soot damage to a customer's room?+
Ordinarily yes as third party property damage, and it is the claim you will actually have rather than the dramatic one. Soot into a room with light carpets and cream sofas costs far more than the job, and frequency moves this premium more than severity does. The controls are completely standard and skipping them under time pressure is what causes the claims: sheet the hearth and floor, seal the opening properly before any disturbance, use a vacuum rated for soot, close internal doors, and ask the householder to move soft furnishings. Photograph the room first, because an existing mark becomes yours otherwise.
What if the chimney was already defective?+
That is the usual position, and establishing it is your protection. Most chimneys being lined or swept were built long before the appliance now connected to them: a stack may be cracked, badly parged, shared with the house next door, bridged by debris, or have a previous liner forced around a bend. Relining disturbs all of it and the householder sees a chimney that was fine on Monday. So a CCTV survey before relining is worth the hour, recording what it showed matters as much as doing it, and where a stack needs rebuilding first, say so in writing and decline the lining.
Who insures chimney and stove installers in the UK?+
It is placed as a heating or specialist installation trade, and most trades insurers will quote it, which is the problem: quoted as sweeping, the certificate exposure and the carbon monoxide limit both get underdone. What separates placements is whether professional indemnity covers the certificates and survey reports you issue, whether the liability limit is sized against a household rather than a room, whether the schedule matches the certification you actually hold, and whether roof access for capping and relining is permitted at the height you work.
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