How Much Moisture Does Mold Need

What Humidity Does Mold Grow? As previously mentioned, mold thrives in humidity levels of 55% or more. Humidity levels can vary throughout the house. Common areas of concern are kitchens, bathrooms, and laundry rooms where water is frequently present in large quantities.

What percentage of moisture does mold need to grow?

Sometimes, humidity or dampness (water vapor) in the air can supply enough moisture for mold growth. Indoor relative humidity (RH) should be kept below 60 percent — ideally between 30 percent and 50 percent, if possible. Low humidity may also discourage pests (such as cockroaches) and dust mites.

Does mold need moisture to survive?

Water: Molds thrive in damp, humid, and wet conditions. They require water to grow and spread, which is why it is recommended to keep homes – especially walls and carpets – as dry as possible. Water leaks, flooding, high humidity, and condensation all provide moisture mold can use to grow and spread.