Put safety first
If water is near a light fixture, electrical panel, or exposed wiring, avoid the area and contact an appropriate professional. Do not climb onto a wet or damaged roof. If a ceiling is bulging, sagging, or dropping debris, keep people away and arrange urgent assessment.
If safe, move belongings away from dripping water, put a container beneath the leak, and document what you see.
Record the evidence before it dries
Photograph the visible stain, the room, exterior areas from ground level, and any water-damaged possessions. Note the date, recent weather, and whether the leak appears only during wind-driven rain or after snowmelt. This helps a roofer investigate and can assist if you need to contact your insurer.
What might be behind the leak?
Leaks can involve missing or damaged shingles, flashing near chimneys or vents, roof penetrations, aging membranes, blocked drainage, or ice and snow issues. Sometimes attic condensation mimics a roof leak. A qualified inspection should identify the entry point and the right repair rather than treating only the interior stain.
Ask for a diagnosis, not just a patch
Request photos or a clear explanation of the likely failure, recommended repair, materials, warranty, and whether adjacent damage needs attention. If a roof is nearing the end of its useful life, ask about the cost and limitations of repair versus replacement. Get scope and price in writing.
Do not forget the inside of the house
Dry affected materials promptly when it is safe. Water-damaged insulation, plasterboard, or concealed cavities may need professional assessment. Cosmetic repainting should wait until the source of moisture is fixed and the area is appropriately dry.