Is my chimney in reverse?

Reverse draw explained

Draw (draft) is the normal upward flow of air that carries smoke, hot gases, and fumes out through the chimney. Reverse draw (downdraft/backdraft) occurs when this airflow is weakened or reversed, causing smoke and fumes to be pushed back into the room instead of exiting the chimney.


Unusual weather conditions can affect how draw works in your chimney. A cold block of air inside your stack can prevent it from lighting properly and smoke you out of the house. It's nothing to worry about though, you just need to wait for the smoke to clear and then try again with hotter and more kindling. Wait for a good bed to lay your dry logs on.

On the odd accasion that this doesn't work, you may need a chimney sweep to push a brush up there and this will clear the air blockage out.

If your chimney flue is less than 4.5metres you are likely to have reverse draw constantly, so call us for a quote to alter your stack or twin wall so that it meets building regulations. Book a quote


What to Do If It Happens

  • Close the stove's air controls quickly.
  • Let the fire go out and allow the smoke to clear.
  • Relight the fire using plenty of dry kindling.
  • Get the fire burning hot as quickly as possible to establish a strong draft.


If it's misty or foggy outside, best to wait until it clears before lighting the fire. 

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