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uk Home & property emergencies water coming through chimney • water leaking around fireplace • chimney breast leak • water ingress chimney • rain coming down chimney • damp patch around chimney breast • chimney leak after heavy rain • water dripping in fireplace • leak behind chimney stack • chimney flashing leak • chimney cap missing water • fireplace surround wet • ceiling stain by chimney • water running down chimney wall • chimney leak in storm • chimney fireplace water leak • water pooling near hearth • chimney stack leak inside

What to do if…
water starts coming into the room around a chimney or fireplace

Short answer

Treat this as an electrical-and-structural risk first: keep people away from the wet area, and switch off electricity at the mains if water could reach wiring, sockets, or appliances and you can do it safely.

Do not do these things

  • Do not touch sockets, switches, or plugged-in appliances if the wall, floor, or your hands are wet.
  • Do not keep using the fireplace/wood burner/gas fire “to dry it out” (water plus heat can worsen damage).
  • Do not climb onto the roof in bad weather or when you’re alone.
  • Do not “seal it from the inside” while water is actively coming in (it can trap water and hide damage).
  • Do not ignore new bulging plaster, sagging ceilings, cracking, or falling debris around the chimney breast.

What to do now

  1. Create a safer pause. Keep children/pets out of the room. Put on shoes. Keep clear of wet walls/floors, especially near sockets, extension leads, TVs, or other electrics.
  2. If water could contact electrics, switch power off safely. Turn off electricity at the consumer unit/main switch only if you can reach it without stepping into water or touching wet surfaces.
    • If there is immediate danger (sparking, smoke/fire, someone injured), move away and call 999.
    • If you can’t safely isolate power and you’re worried water is affecting electrical supply equipment or cables, contact your local electricity network operator (you can call 105).
  3. Stop using anything venting through that chimney.
    • Open fire / stove / wood burner: stop using it until checked and dried.
    • Gas fire or any gas appliance connected to that flue/chimney: turn it off. If a carbon monoxide alarm sounds, you smell gas/exhaust fumes, or anyone feels unwell, follow gas emergency guidance and get to fresh air.
  4. Contain the water to limit damage. Put a bucket/trug where it’s dripping. Lay towels around the hearth/skirting. If water runs down a wall, tape a plastic sheet so it channels into a container (keep away from hot surfaces).
  5. Reduce collapse risk. If plaster is soft/bubbling, masonry crumbs are falling, or the ceiling near the chimney looks swollen or is dripping, keep the area underneath clear and avoid sleeping in that room until it’s assessed.
  6. Document quickly, then contact the right party.
    • Take photos/video of where water appears and any ceiling/wall changes.
    • If you rent, report it as an urgent repair to your landlord/agent (roof/chimney leaks can escalate quickly). Use their out-of-hours/emergency repairs contact if needed.
    • If you own, contact your insurer/home emergency provider (if applicable) and book a roofer or chimney specialist. Leaks here are commonly from flashing/soakers, failed pointing, chimney crown, or a missing/damaged cap/cowl.
  7. Before you use any gas appliance again, get it checked if you’re unsure. If water has affected a gas fire or you’re uncertain about the flue’s condition, arrange a Gas Safe registered engineer check before reuse.

What can wait

  • You do not need to diagnose the exact cause (flashing vs cap vs masonry) right now.
  • You do not need to strip plaster, repaint, or run dehumidifiers until water ingress has stopped and electrics are confirmed safe.
  • You do not need to decide today whether to make an insurance claim—focus on safety, evidence (photos), and stopping further damage.

Important reassurance

This is a common “sudden panic” problem in heavy rain and storms. The safest first steps are simple: avoid electrical shock risk, stop using the fireplace/appliance, contain the water, and get the roof/chimney checked when it’s safe to access.

Scope note

These are first steps only. The repair usually needs a roofer/chimney professional, and if water has been near wiring or sockets an electrician may need to confirm safety.

Important note

This is general information, not a professional inspection or legal advice. If you suspect electrical danger, structural instability, a gas leak, or a carbon monoxide risk, treat it as urgent and get professional help.

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