What indoor condition can promote mold growth?

High humidity levels are a significant factor in promoting mold growth indoors. Mold thrives in environments where moisture is abundant, and high humidity provides the necessary conditions for spores to germinate and proliferate. Typically, when indoor humidity levels exceed 60%, the likelihood of mold growth increases substantially. This is because mold requires moisture to survive, and high humidity creates a conducive environment for various types of mold to flourish on organic materials such as wood, drywall, and fabric.

In contrast, low temperatures can inhibit mold growth, as the physiological activity of mold slows down in colder conditions. Excessive ventilation generally helps to reduce humidity levels, thereby making it less likely for mold to develop. Similarly, bright lighting, particularly from natural sunlight, can discourage mold growth as it reduces darkness—another condition that many types of mold prefer for growth. Thus, maintaining a balanced indoor environment with moderated humidity is essential in preventing mold issues.