What factor can increase the likelihood of mold growth indoors?

High indoor humidity is a significant factor that increases the likelihood of mold growth indoors. Mold thrives in environments with excess moisture, as this provides the ideal conditions for spores to germinate and proliferate. When humidity levels exceed 60%, the air becomes saturated with moisture, which can condense on surfaces, promoting mold growth on materials such as wood, drywall, and fabric.

In contrast, low temperatures can slow down mold growth, as many molds prefer warmth to thrive. Good ventilation helps to reduce indoor humidity levels by allowing for air circulation, which can prevent moisture accumulation. Additionally, thick walls might provide some insulation but do not inherently contribute to increased mold growth unless they trap moisture. Hence, maintaining lower humidity levels through proper ventilation and monitoring is key to preventing mold issues indoors.