Chimney fire safety
Keep your chimney safe and reduce the risk of fire
Every year, Oxfordshire Fire and Rescue Service attends chimney fires caused by blocked, poorly maintained or defective chimneys. Many of these fires could be prevented through regular sweeping, maintenance and safe use of open fires and wood-burning stoves.
During 2025/26, Oxfordshire Fire and Rescue Service attended 58 chimney fires, with most occurring during the colder months when fireplaces, log burners and solid fuel appliances are used more frequently.
If you use an open fire, wood burner or multi-fuel stove, now is the time to make sure your chimney is clean, safe and ready for use.
Why do chimney fires happen?
When wood, coal and other solid fuels are burned, soot and tar deposits (creosote) build up inside the chimney. Over time these deposits can ignite and cause a chimney fire.
Other causes include:
- Poor maintenance or infrequent sweeping
- Bird nests or debris blocking the flue
- Damaged or deteriorating chimney liners
- Cracked brickwork or mortar
- Using the wrong fuel for your appliance
A blocked or damaged chimney can also increase the risk of dangerous carbon monoxide entering your home.
How often should I have my chimney swept?
The frequency depends on the type of fuel you burn.
| Fuel type | Recommended sweeping frequency |
|---|---|
| Wood | Up to four times a year when in use |
| Smokeless fuel | At least once a year |
| Bituminous coal | At least twice a year |
| Oil | Once a year |
| Gas | Once a year by a suitably qualified engineer |
Always use a professional chimney sweep and retain records of any inspections or maintenance carried out.
Chimney safety checklist
Do
- Have your chimney professionally swept and inspected regularly.
- Have wood-burning and multi-fuel stoves serviced annually.
- Use the correct fuel recommended for your appliance.
- Use a fire guard with open fires to protect against sparks and hot embers.
- Ensure air vents and air bricks remain clear so the fire can burn efficiently.
- Check chimney brickwork for cracks or damage.
- Keep the area around your chimney clear, particularly in loft spaces.
- Ensure embers are fully extinguished before going to bed.
- Ensure a carbon monoxide alarm is installed in any room containing a wood-burning stove, open fire or other solid fuel appliance and tested regularly
Don't
- Burn household waste, cardboard, paper or unsuitable materials.
- Store logs, fuel or combustible materials close to a stove or open fire.
- Block ventilation openings or air bricks.
- Assume a chimney liner removes the need for sweeping and maintenance.
- Continue using a chimney or appliance if you suspect it is damaged or blocked.
Find a qualified chimney professional
Regular chimney sweeping and appliance maintenance can help prevent chimney fires and reduce the risk of carbon monoxide poisoning. To find a qualified chimney sweep or approved installer, visit: