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uk Home & property emergencies

What to do if…
smoke is coming from inside a wall or ceiling

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Treat smoke coming from inside a wall or ceiling as a possible concealed fire. Alert everyone, leave by the nearest safe route, call 999 for the fire and rescue service once outside, and stay out.

Do not do these things

  • Do not cut, drill, remove a panel, or pull down part of the wall or ceiling to investigate.
  • Do not pour water into the wall or ceiling, particularly near wiring, sockets, or light fittings.
  • Do not delay leaving to switch off the electricity or gas.
  • Do not try to tackle a concealed fire with a household extinguisher.
  • Do not stop to collect belongings or search for pets.
  • Do not use a lift when leaving a block of flats.
  • Do not go back inside, even if the smoke appears to have stopped.

What to do now

  1. Warn everyone in the property and leave immediately by the nearest safe route. If there is smoke on the route, keep low where the air may be clearer. Do not open a door that feels warm.
  2. Close doors behind you if you can do so without delaying your escape.
  3. Once outside, call 999 and ask for the fire and rescue service. Give the full address or postcode and say that smoke is coming from inside a wall or ceiling.
  4. Tell the operator whether anyone may still be inside and identify the room and part of the wall or ceiling involved. Describe exactly what you saw, smelled, or heard.
  5. Stay outside at a safe meeting place, keep entrances and access routes clear, and wait for the fire and rescue service.
  6. If smoke or heat blocks every escape route, do not enter it. Move into a room with a window and phone, close the door, block gaps around it with bedding or towels if available, call 999, and give your exact location inside the building. Follow the operator’s instructions.
  7. Tell the 999 operator if anyone has breathed in smoke or fumes or feels unwell. Ask for an ambulance if anyone has severe difficulty breathing, becomes confused, loses consciousness, or is not breathing normally.

What can wait

You do not need to find the cause, open the wall or ceiling, switch off utilities, contact a tradesperson, take photographs, notify a landlord or insurer, or decide how repairs will be handled before leaving and calling 999. These matters can wait until the fire and rescue service has assessed the property and said what is safe.

Important reassurance

You do not need to see flames or prove that there is a fire before calling 999. Reporting what you can see, leaving safely, and allowing firefighters to investigate are the useful actions now.

Scope note

This guide covers the first actions during a suspected concealed fire. After the fire and rescue service has made the situation safe, further checks may be needed from a suitably qualified electrician or contractor, the property owner or landlord, or an insurer.

Important note

This is general safety information and does not replace instructions from a 999 operator or the fire and rescue service. Follow their directions and any building-specific fire procedure, but do not enter an escape route affected by smoke or heat.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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