How Long Does It Take For Black Mold To Form On Drywall. It is important to properly clean and dry the area as you can still have an allergic reaction to parts of the dead mold and mold contamination may recur if there is still a source of moisture. Once toxic black mold is growing though it usually forces out any other molds growing nearby and takes over its environment.
The process can take as little as 24 hours, but you might not see the damage for a week or more. How long does it take for mold to grow? As its name implies, drywall needs to stay dry as moisture results in warping and rot.
If you want to act fast enough to prevent mold from spreading after suffering water damage, you need to understand how growth works and the speed at which it can spread.
It may be a week or two before it grows to the extent that it is visible to the naked eye as spots on drywall or carpet pads. It’s probably not what you think. In mild cases, the mold will cause discoloration and an unpleasant smell. Once it gets wet, porous drywall quickly becomes a breeding ground for mold growth.