Which aspect of ventilation can contribute to mold growth in building cavities?

Improper ventilation of outside air is a significant factor that can contribute to mold growth in building cavities. When ventilation is not adequately managed, it can lead to moisture accumulation within the building envelope. For instance, if outside air is not introduced properly or if there is an imbalance in the ventilation system, areas may experience higher humidity levels. This can create a suitable environment for mold spores to thrive, especially in damp or poorly ventilated spaces where air circulation is limited.

Furthermore, without proper intake and exhaust of outside air, stale, moist air can become trapped, leading to condensation on surfaces and in cavities. This moisture, combined with organic materials often found in building assemblies, provides the necessary conditions for mold growth. The ongoing presence of moisture can ultimately compromise building integrity and occupant health, making it essential to maintain proper ventilation practices to mitigate these risks.

The importance of correcting ventilation issues highlights the need for adequate airflow to reduce humidity levels, prevent condensation, and minimize the chance of mold development.