A ceiling leak that occurs exclusively during or immediately after heavy rainstorms is typically caused by exterior building envelope failures. Common causes include damaged, missing, or curled roof shingles, compromised flashing around chimneys, skylights, and vent pipes, clogged roof gutters overflowing against fascia boards, or wind-driven rain penetrating compromised attic siding. The water accumulates in the attic before soaking through insulation and pooling on your ceiling drywall. Verification: Inspect your roof from the exterior or hire a professional roofer to check flashing and shingle integrity.
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