No, mold does not need light to grow.
Mold thrives in damp, dark, and poorly ventilated areas, but light is not a requirement for its growth. While some types of mold might tolerate light better than others, it's the presence of moisture and an organic food source that are the primary drivers of mold growth.
Here's a breakdown of factors that contribute to mold growth:
- Moisture: This is the most critical factor. Mold needs a source of water to grow. This can be from leaks, humidity, condensation, or spills.
- Organic Material: Mold feeds on organic matter like wood, drywall, paper, and fabric.
- Temperature: Mold can grow in a wide range of temperatures, but it generally thrives in warm conditions.
- Oxygen: Mold requires oxygen to grow.
- Time: Mold spores need time to germinate and establish a colony.
While light isn't a necessity, keeping areas dry and well-ventilated is crucial for preventing mold growth, even in dark spaces. Covering wet wood will not prevent mold growth because the absence of light will not kill existing mold or prevent new mold from growing.
