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Chimney leak investigation and repair — Chimney sweep

Describe whether the reported chimney leak concerns rainwater or suspected smoke or combustion-gas escape, and provide the location and observed symptoms. Suspected gas or smoke escape needs an appropriate urgent safety route, not a routine waterproofing appointment.

Service scope

Investigation of a reported leak associated with a chimney, with an initial distinction between water ingress and smoke or combustion-gas escape. The contractor scopes the relevant structure, flashing, flue or appliance interface and proposes repairs only after the leak mechanism has been identified.

What is normally included

  • Investigate the identified leak symptoms
  • Distinguish water-ingress repairs from flue or appliance work
  • Carry out and document the separately agreed repair

What is not included

  • No generic sealing repair for every leak
  • Safety-sensitive gas/smoke concerns require an appropriate urgent route
  • Treating suspected combustion-gas escape as routine damp repair
  • Guaranteed diagnosis from an interior stain alone

Typical tasks

  • Investigate the identified leak symptoms
  • Distinguish water-ingress repairs from flue or appliance work
  • Carry out and document the separately agreed repair
  • Record where and when the reported leak occurs to guide the investigation
  • Agree the post-repair checks appropriate to the identified leak mechanism

What to include in your brief

  • Water ingress or suspected smoke/gas escape
  • Location, symptoms and appliance connection
  • Diagnosis versus confirmed repair scope
  • Chimney height, roof access and photographs taken from a safe position
  • Previous chimney, roof or appliance repairs and whether symptoms recur during rain or appliance use

Choosing the right professional

Select a provider for the actual leak pathway. Ask what diagnosis is included and which repairs depend on the findings; a stain alone does not establish the cause.

Important considerations

  • Water and combustion-gas leaks require different expertise and responses
  • Hidden flue or roof defects may expand the repair scope

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