Chimney fire safety

In order to keep you and your family safe from fire, you need to take necessary steps such as ensuring your chimney is swept regularly, depending upon what fuel you burn and we would urge all householders to have a working smoke alarm in their home.

Our key message is: Keep your chimney clean!

Tips for safer chimneys

Cheshire firefighters deal with approximately 100 chimney fires in Cheshire every year.  Most chimney fires are preventable. Regular inspection and cleaning of chimney flues will help prevent fires within chimneys.

Here are some top tips for safer chimneys:

  • Keep chimneys and flues clean and well maintained

  • Make sure embers are properly put out before you go to bed

  • Always use a fire guard to protect against flying sparks from hot embers

Clean your chimney regularly

The latest statistics show that there are approximately 7,000 chimney fires a year in England, but most of these are preventable.

To keep yourself and your family safe from fire you should take care to have your chimney swept regularly, depending upon what fuel you burn, before the colder winter months set in and you begin to use your fire and chimneys again.

If the worst should happen, a smoke alarm can give you the extra time you need to escape in a house fire - make sure you test yours regularly.

How often should you clean your chimney?

  • Oil - Once a year

  • Gas - Once a year

  • Bituminous coal - Twice a year

  • Wood - Up to four times a year

  • Smokeless coals - At least once a year

Most common causes of chimney fires

The most common causes of chimney fires are:

  • Improper appliance sizing

  • Burning unseasoned wet wood

  • Infrequent sweeping and cleaning

  • Overnight burning or smouldering wood for long periods in wood stoves

Tips to reduce the risk of chimney fire

  • Chimneys must be swept on a regular basis this can be as much as three times in the burning season (winter) but at least once per season regardless of fuel type.

  • All wood burned must have a moisture content of no more than 17 percent.

  • It is important to purchase the correct size appliance for your room, an appliance which is too large will never be used hot enough to volatize all of the fuel within the wood and unburned fuel will pass up the chimney as smoke and condense within the flue as extremely flammable creosote.

 To minimize creosote production in a wood stove these steps can be followed:

  • Once the fuel load has been ignited and the flue has been heated to its operating temperature, the stoves air supply should be adjusted to limit the amount of air to avoid over firing and excessive heat loss up the chimney. They should, however, be open enough to maintain moderate flaming combustion in the fire box. (The flames should fill the entire window or fire box without being sucked up the chimney).

  • To determine if this is maintained the condition of the fire should be checked through any glass panels and the density of the smoke as it exits the flue at the top should also be checked.

  • An internal probe type thermometer located within the flue can be used to ascertain if flue temperatures are of a sufficient temperature or if they are excessive, magnetic flue temperature thermometers can also be utilised to this end.

  • It is important when using a multi fuel stove that you control the burning of the appliance by the air inlets provided for this purpose not using any dampers which could obstruct the safe passage of exhaust from being able to exit the appliance.

Remember a blocked flue can kill and the exclusion of air will put out a fire.

All chimneys and flue-ways should be cleaned and checked during the summer months to ensure they are free from debris and in full working order before the heating season. A blocked or defective chimney can cause both chimney fires and carbon monoxide poisonings so it's very important to employ a professional qualified Chimney Sweep such as those certified by NACS.

HETAS - list of competent installers and servicing businesses

HETAS is the official body recognised by Government to approve biomass and solid fuel heating appliances, fuels and services, including the registration of competent installers and servicing businesses.

HETAS - find an installer (opens in new window)

Registered Chimney Sweeps

To find a certified Chimney Sweep, or for more information on chimney fire safety, please visit one of the following websites:

The National Association of Chimney Sweeps

The National Association of Chimney Sweeps (NACS) is the national trade body for professional Chimney Sweeps in the UK and is also a full member of ESCHFOE representing Great Britain. The NACS is dedicated to consumer chimney safety. The NACS has a dedicated Chimney Training Centre (CTC) for professional Chimney Sweeps to undertake training. The centre is also CITB accredited for the NVQ Chimney Engineering.

The National Association of Chimney Sweeps (opens in new window)

Guild of Master Sweep

The Guild is a professional organisation working closely with European colleagues, to raise standards in the industry and promote customer awareness around the dangers associated with burning carbon based fuels. The Guild is a member of the European Federation of Chimney Sweeps (ESCHFOE).

Guild of Master Sweep (opens in new window)

The Association of Professional and Independent Chimney Sweeps

Formed in April 2002, APICS recognises the independence of sweeps but forms them into a Trade Association. APICS is keen to raise the standard of sweeps throughout the country and keep all members updated with the latest technology and health and safety issues. They assess all new sweeps to ensure competency and encourage all members to educate the public with regard to chimney fires and CO poisoning.

The Association of Professional and Independent Chimney Sweeps (opens in new window)

Last updated: Friday, 1 September 2023