The answer to 'why is my floor mildew' is that excess moisture, poor ventilation, and lack of cleaning are common causes of mildew growth on floors. Mildew is a type of fungus that thrives in damp, humid environments and can discolor and damage floors over time.
Some common symptoms of floor mildew include visible fungal growth, musty odors, and slippery or crumbling floor surfaces. Resolving the underlying moisture issue is key to preventing and removing mildew. This may involve improving ventilation, fixing leaks, or using a dehumidifier. Regular cleaning and disinfecting the floor with a mildew-killing solution can also help.