The growth and spread of mold in walls can vary depending on several factors, such as the type of mold, the moisture source, and the temperature and humidity conditions. In general, mold spores can start to colonize on surfaces within 24 to 48 hours of exposure to moisture. However, it can take several days or weeks for visible mold growth to appear.
If there is a continuous source of moisture, such as a leaky pipe or a damp basement, the mold can continue to grow and spread rapidly. As mold grows, it can release more spores into the air, which can spread to other areas of the building and cause more damage.
It is important to address any water damage or moisture issues as soon as possible to prevent the growth and spread of mold. If you suspect that there is mold growing in your walls, it is best to contact a professional mold remediation company for a proper inspection and remediation plan.