The place where water appears indoors is not always directly below the roof entry point; water can travel along framing, underlayment, and fasteners. To find the source, correlate the leak with rain and wind and inspect roof penetrations and transitions without creating a fall hazard.
Relate the leak to the type of weather
Note whether the leak appears during straight rain, wind-driven rain, snowmelt, or only after hours of wet weather. A wind-dependent leak may point toward flashing or a sidewall transition rather than a damaged shingle directly overhead.
Inspect from inside when safe access exists
In a safely accessible, dry attic, look for darkened wood, wet fasteners, and water tracks leading uphill. Do not step between joists or approach wet electrical wiring; stop if safe access is not available.
Prioritize penetrations and roof transitions
Flashing around chimneys, vents, skylights, and wall intersections accounts for many leaks because these features interrupt the continuous roof surface. From the ground or safe photo vantage points, look for lifted pieces, failed sealant, or visible damage.
Do not perform hose tests from an unsafe roof
A controlled hose test can help a professional, but wetting a roof while someone walks on it increases fall risk and can introduce more water into the home. If locating the source requires elevated exterior access, use a roofing professional.