Water Damage Timelines Hours 1-4 Drywall Begins to Dissolve and Breakdown Metal Surfaces Begin to Tarnish Furniture begins to swell and crack. Dyes and Inks From Cloth and Paper Goods Spread and Stain A Must Odour Begins to Form. 48 Hrs- 1 Week Mould and mildew may grow and spread. Doors, windows, and studs swell [...]