Scan the roof plane
Dips, mixed repairs and several replacement slates are worth asking about.
Use the loft during a proper survey
Fresh damp and altered rafters matter more than harmless old staining.
Useful evidence: keep one wide photograph that shows where the problem sits on the roof. Close-ups make more sense when the position is obvious.
Think about access
A modest chimney defect can cost more to reach than a larger low-level repair.
Ready to get the fault inspected?
If you have photographs from safe ground, send one wide view as well as any close-up.
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