Can sweeping your own chimney invalidate your home insurance?

Nothing says cosy quite like a roaring fire in your own front room, but having a working chimney means making sure it’s well maintained and doesn’t pose a fire hazard.

Figures from the Home Office’s Incident Recording System reveal that around 4,000 home fires start in chimneys each year in the UK. So what are the rules when it comes to sweeping your chimney, and can it affect your home insurance policy?

Do I have to sweep my chimney for home insurance purposes?

There’s no universal answer to this and ultimately it depends on the conditions set out in your own buildings insurance or buildings and contents insurance policy.

Some policies may simply state that your home must be in a ‘good state of repair’ without mentioning anything specific, while others may have clear conditions about how often you should sweep working chimneys. Bear in mind that almost all insurers expect you to carry out ongoing maintenance on your home to lower the risk of serious long-term damage.

Based on that, it makes sense to have your chimney swept after winter even if it’s not specifically mentioned in your policy. If you don’t, and a chimney fire starts, your insurer could argue that your home wasn’t properly maintained – which means they could refuse to pay out. If you’re in any doubt, speak with your insurer to be sure.

What if I have a thatched roof or wood burning stove?

If your home has a thatched roof, is timber framed, or has had a wood burning stove installed, then your insurer may have strict rules about maintaining the stove and the chimney – so always read the small print in your policy documents.

If your home has a thatched roof, the chimney will need to meet certain building standards. It should be lined and insulated depending on what fuel you burn. You’ll be expected to make sure it meets current regulations – if not, you could invalidate your policy.

How often should you sweep your chimney?

Check your policy documents to see if your own insurer has any rules about this. Otherwise, guidelines from safety group HETAS (Heating Equipment Testing and Approvals Scheme) suggest you should sweep your chimney at least twice a year if you’re burning wood or coal (before and at the end of the season). If you usually burn smokeless fuels, you should aim for at least once a year.

What is a chimney sweep certificate for insurance?

A chimney sweep certificate is proof that your chimney has been professionally swept. Keep your certification safe because your insurer may insist on seeing it if you need to make a claim related to fire damage.

The certificate should contain details such as when the next sweep should take place, the condition your chimney is in, and the state of your stove if you have one. It will also note any problems and whether any follow-up work needs to be done.

A certificate from a HETAS-registered or Guild of Master Chimney Sweeps (GoMCS) member carries the most weight with insurers. Some providers specifically ask for a certificate from a recognised body, so it’s worth checking your policy wording.

Can I sweep my own chimney, or will it invalidate my home insurance?

There are some jobs best left to the professionals. Unless you’re a chimney sweep by trade, it’s a good idea to hire an expert. If your chimney caught fire after you swept it yourself, there is a risk that your home insurance provider could refuse to cover the cost of any damage because it wasn’t swept by a trained professional.

When hiring a professional chimney sweep, look for membership of the following bodies and schemes:

• HETAS Approved Chimney Sweep
• The Association of Professional Independent Chimney Sweeps (APICS)
• The Guild of Master Chimney Sweeps (GoMCS)
• The National Association of Chimney Sweeps (NACS)
• Sweep Safe

If you are a sweep by trade, it’s always worth asking your insurer whether a certificate issued by yourself is valid.

Is chimney repair covered by home insurance?

Whether chimney repair is covered depends on what caused the damage. Most standard buildings insurance policies cover sudden, unexpected events such as storm damage, fire, or falling trees. If a storm dislodges your chimney stack or damages the flashing, your buildings insurance is likely to cover the repair costs minus any excess you need to pay.

However, general wear and tear is not covered. Crumbling mortar, deteriorating flaunching, or a slowly leaking chimney flashing would typically be classed as a maintenance issue. The Association of British Insurers (ABI) notes that home insurance is designed to cover unforeseen events rather than gradual deterioration. If your chimney needs repointing simply due to age, you would usually need to pay for this yourself.

If you’re unsure whether your situation counts as insured damage, contact your insurer before commissioning any repair work. They may send a loss adjuster to assess the cause before approving a claim.

How often do insurers require a chimney sweep?

There is no single industry standard. Each insurer sets its own requirements, which is why reading your policy wording carefully matters. Some policies require an annual sweep by a certified professional, while others simply require the property to be kept in a reasonable state of repair without specifying frequency.

As a general guide, HETAS recommends sweeping at least once a year for smokeless fuels and at least twice a year for wood or coal. For thatched properties, some specialist insurers require quarterly sweeps – so the type of property and fuel you burn both play a role.

Keeping a record of every sweep – including the date, the sweep’s registration number, and a copy of the certificate – gives you strong evidence if you ever need to prove maintenance to your insurer during a claim.

You might also need

If your home has a thatched roof, timber frame, or other non-standard construction, you may need specialist cover. Thatched roof insurance covers the additional fire and weather risks that come with a thatched property, while non-standard home insurance covers a wider range of unusual construction types including cob, wattle and daub, and listed buildings.

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