What commonly contributes to mold growth in a home's interior?

High humidity levels are a primary contributor to mold growth in a home's interior because mold thrives in moist environments. When the relative humidity in a space rises above 60%, it creates an ideal environment for mold spores to germinate and develop. This is often found in areas like bathrooms, kitchens, and basements where moisture levels are naturally elevated.

To prevent mold growth, it is important to manage humidity through proper ventilation, the use of dehumidifiers, and ensuring that any water spills or leaks are addressed promptly. While low temperatures might slow down mold growth, they do not eliminate the potential for it if humidity remains high. Infrequent cleaning can result in dust and other organic materials accumulating, but without the moisture, mold will not flourish. Bright lighting might deter some organisms, but mold requires specific conditions related to moisture, making high humidity the most critical factor in its development.