How Long Does It Take For Black Mold To Form On Wood. How long does it take for black mold to form? While most molds take just one or two days to colonize, toxic black mold usually needs eight to twelve days.
If the mold has been present on the wood for a long time, the streaks may go deep into the wood. Mix one tablespoon of detergent to one quart of water. The surfaces that commonly support the growth of black mold, include:
Mold only needs two things to thrive, water and organic matter to feed on.
While most molds take just one or two days to colonize, toxic black mold usually needs eight to twelve days. Mold isn’t something that takes a long time to grow either. Personal experience on mold jobs: Don't be fooled by a builder that says the wood will dry out on it's own in the wall.