The answer to 'why is my tile moldy' is that tile and grout can become moldy due to excess moisture, poor ventilation, and lack of regular cleaning. Mold thrives in damp environments and can grow on tile surfaces, in grout lines, and behind tiles. Common symptoms include discoloration, musty odors, and visible mold growth.
To address tile mold, first identify and fix the source of moisture, such as leaks, poor drainage, or high humidity. Increase ventilation in the area, use a dehumidifier if needed, and clean the tile and grout regularly with a mild bleach solution or specialized mold-killing cleaner. If the mold is extensive or keeps returning, you may need to regrout or even replace the tiles, which is best done by a professional tile cleaning and restoration service.