Possible causes, not a remote diagnosis
A professional may investigate cracks, drainage, previous patches and adjoining masonry. The visible surface does not show every concealed defect or prove the source of an indoor leak.
What to document safely
Keep existing inspection photographs and reports. Ask for roof-level photographs during a professional visit rather than attempting your own roof inspection.
Keep the appliance model, fuel, previous report and date of last service together. A clear sequence of events can be more useful than deciding in advance which component must be replaced.
Your next service conversation
Discuss whether repair or replacement is appropriate, how water will drain and whether nearby brickwork also needs attention. Clarify the scope of any warranty.
Masonry and chimney crown repair →Is the crown the same as a chase cover?
No. A chase cover typically protects the top of a framed enclosure; a masonry crown is a different component. Ask the contractor to identify your system before recommending materials.
Ask for evidence before approving repairs
Request a report that distinguishes what was observed from what remains uncertain. Ask the company to identify any area it could not inspect and whether another trade is needed. If a major repair is proposed, compare a second written scope using the same appliance details and findings.
Do not treat a directory profile, an estimate or this page as clearance to use an appliance. Ask the attending professional what must be resolved before reuse.
Read the detailed guide and its sourcesTake 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.