How to Light a Log Burner (Step by Step, Without the Smoke)
How to Light a Log Burner Step by Step, Without the Smoke
Most smoky rooms, sooty glass and tarry flues we see across Essex and Hertfordshire start the same way: a fire that was lit cold and slow. Light it properly and your log burner gets hotter faster, burns cleaner and leaves far less creosote in your chimney.
To light a log burner, open all the air vents, lay two or three dry split logs on the base, stack kindling on top, add a firelighter and light it from the top. Leave the door slightly open for a few minutes until the kindling is roaring, then close it and turn the air down gradually once the logs have caught.
What you need before you start
Getting these right matters more than any lighting trick. Wet wood is the number one reason a log burner smokes, won't stay lit or blackens the glass.
- Dry, seasoned logs under 20% moisture. Look for the Ready to Burn logo or check with a moisture meter (about £15).
- Kindling, thin sticks of dry softwood, around a thumb's thickness.
- Firelighters. Natural wood wool ones are cleaner than paraffin cubes. Scrunched newspaper works in a pinch.
- A swept flue. If it's been over a year, or you can't remember, get it swept before the first fire of the season.
- A working carbon monoxide alarm in the same room as the stove. It's a legal requirement for new installs and non-negotiable for safety.
How to light a log burner: the top-down method
The top-down method is what stove manufacturers and the Stove Industry Alliance recommend. Lighting from the top means the smoke passes through the flames and burns off, instead of drifting up a cold flue.
Open all the air controls
Open the primary and secondary air vents fully (and the tertiary vent if your stove has one). A new fire needs as much air as possible to get going.
Leave a thin bed of ash
Wood burns best on a 1–2cm bed of ash, so don't empty it all out. On a multi-fuel stove with a grate, riddle it so air can pass through.
Lay two or three logs
Place two or three smaller split logs side by side on the base, with a small gap between them for air.
Stack kindling on top
Build a small crisscross stack of kindling on top of the logs, two or three layers deep. Keep it loose so air can flow.
Light from the top
Tuck one or two firelighters into the top layer of kindling and light them. Close the door but leave it slightly ajar for the first few minutes.
Close the door and turn it down
Once the kindling is burning hard and the logs have caught (10–15 minutes), close the door and turn the primary air down. Wood burns mainly on secondary air.
How to keep it burning well
Lighting is only half of it. How you run the stove afterwards decides how much tar and soot ends up in your flue.
- Reload little and often. Add two or three logs when the flames have died down to a glowing bed of embers, not a heap of cold ones.
- Open the air for a few minutes after reloading so the new logs catch quickly, then turn it back down.
- Use a stove thermometer on the flue pipe or stove top and keep it in the marked burn zone. Too cool means creosote, too hot risks damaging the stove.
- Look at the flames. Bright, lively yellow flames and clean glass mean a good burn. Lazy orange flames and black glass mean it needs more air or drier wood.
Never slumber your stove overnight. Shutting the air right down to keep it ticking over for hours is the fastest way to coat your flue in tar-like creosote, which is what causes most chimney fires. Let it burn out safely instead. And never use petrol, paraffin or lighter fluid to get a fire going.
Common lighting problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Smoke comes into the room when lighting | Cold flue, or the room is short of air | Open a window slightly and use the top-down method so the flue warms quickly |
| Fire keeps going out | Damp logs or air turned down too early | Use wood under 20% moisture and keep air fully open for the first 10–15 minutes |
| Glass goes black | Burning too cool, wet wood, secondary air closed | Keep the secondary (airwash) vent open and burn hotter |
| Smells of smoke when the fire is out | Soot or creosote build-up, or downdraught | Book a sweep and a smoke test |
| Stove roars and is hard to control | Too much air, or a door seal has failed | Turn the air down, check the door rope seal |
When to get your chimney swept
If your log burner is hard to light, smokes back or the glass blackens even with dry wood, the flue may be partly blocked with soot, creosote or a bird's nest. For wood, a sweep at least once a year is the minimum, and every three months while in use if you use your stove heavily.
Not sure when you last had it done? Read our guide to how often to sweep your chimney, or book a chimney sweep near me with our HETAS certified team.
Common questions
Should the door be open or closed when lighting a log burner?
Leave the door slightly ajar for the first few minutes while the kindling gets going, then close it. Never leave the stove unattended with the door open, and don't run it with the door open once it's lit.
Which air vent should be open on a log burner?
Open all the vents when lighting. Once the logs are burning well, turn the primary (bottom) air down, because wood burns best on secondary air from above. Multi-fuel stoves burning smokeless fuel need more primary air from below.
Why won't my log burner stay lit?
The usual causes are damp wood, turning the air down too soon, or a flue that isn't drawing because it's cold or partly blocked. If dry wood and plenty of air don't fix it, get the chimney swept and checked.
Can I leave a log burner on and go out?
It's not recommended. Let the fire burn down to embers before you leave, keep the door closed and make sure you have a working carbon monoxide alarm. Never slumber it on low air while you're out.
Related guides
Get your log burner winter ready
The checks to do before the cold sets in.
What is creosote?
The three stages and how to prevent them.
7 signs your chimney needs sweeping
When to book sooner than the calendar says.
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