Saturated drywall becomes colonized within 24 to 48 hours under elevated relative humidity conditions
https://express-business-near-gardenofthegods.publishlane.com/posts/bacterial-contamination-levels-determine-if-wet-walls-need-immediate-mold-treatment
\nMold growth on wet drywall accelerates dramatically when relative humidity remains above 60 percent and moisture content exceeds the fiber saturation point