During winter, the Southeast experiences sharp temperature changes, periods of heavy rain, and occasional short freezes. Even a small gap around flashing, shingles, or underlayment gives water a path into the roof. Once moisture enters, it does not stay in one place! It travels along framing, seeps into insulation, and settles in areas where it can freeze overnight, then thaw during the day. Each freeze-thaw cycle expands and contracts the materials around it, which weakens seals, loosens shingles, and opens new pathways for additional water to enter.

Industry experts note that a leak can cause significant hidden damage long before it becomes visible indoors. Moisture trapped behind drywall or under the roof deck can quietly deteriorate wood, weaken structural components, or feed mold growth before a homeowner realizes the scope of the issue.