Illustrative scenario. This is not a documented customer project, testimonial or confirmed diagnosis.
What an inspection might investigate
An investigator might review the cap, crown or chase cover, flashing, masonry and nearby roof. The indoor stain needs to be connected to an entry path rather than used as proof that the new cap failed.
A possible service path
Collect the before-and-after history and request an investigation with photographs. If more than one trade is involved, agree who owns each repair and how recurrence will be handled before decorating the ceiling.
The homeowner's question
What evidence supports this water-entry path, and how will we check the outcome?
What a useful outcome would contain
A dated report, clearly identified findings and an explanation of unresolved questions are more useful than a reassuring phrase. If further work is recommended, the homeowner should receive a scope that separates investigation, repair and restoration. This example does not assume any particular finding or successful outcome.
Take the service question to your location
Use the local guide to prepare questions about access, building history and the authority responsible for your address. The service brief is national guidance; local permits and current burn restrictions must be checked separately.