How do I find the source of a leak in my roof?

Finding the exact source of an elusive roof leak requires tracing water trails upward from where it drips inside the house. First, go into your attic with a bright flashlight during or immediately after a rainstorm to trace wet insulation, stained roof rafters, or dripping water back up to the highest point of the moisture trail. Second, remember that water travels downward along framing before dripping, so the roof entry point is usually directly above or slightly uphill from the interior drip. Third, inspect the corresponding exterior roof area for missing shingles or cracked flashing. You can troubleshoot attic inspections safely by stepping only on solid ceiling joists. You can verify that your corrective action is successful when identifying the damaged shingle or flashing on the roof exterior and repairing it stops water from entering your attic during future storms.