Expect continuous moisture migration through wall cavities for 24 to 72 hours after water damage
https://express-code-inspected-water-damage.tearosediner.net/gradual-damage-versus-sudden-loss-determines-whether-water-claims-get-approved
When drywall gets wet, drying typically takes 24 to 72 hours under ideal conditions, but the timeline depends on saturation depth, humidity, and active dehumidification