Opening a ceiling during renovation can reveal old or active moisture marks. The discovery date is not necessarily the date of the leak. Roof, plumbing, and mechanical sources may need to be considered.
What to do next
Photograph the exposed area before it is closed again and note any current moisture observations. Ask the relevant professionals to distinguish historical evidence from ongoing conditions. Keep renovation repairs separate from source correction so new finishes do not conceal an unresolved problem.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.