The answer to 'why is my floor moldy' is that mold growth on floors is typically caused by excess moisture, poor ventilation, and lack of cleaning. Mold thrives in damp, humid environments and can spread quickly if left untreated. Common symptoms include discoloration, a musty odor, and visible mold growth.
To address a moldy floor, you'll need to identify and fix the underlying moisture issue, clean the affected area thoroughly, and take steps to prevent future mold growth. This may involve improving ventilation, fixing leaks, and using mold-resistant cleaning products. In some cases, you may need to call a professional mold remediation service, especially if the mold has spread extensively or you suspect the presence of toxic black mold.