What Is the Difference Between Mold and Mildew?

Mildew usually shows up as a flat, powdery or downy patch on damp surfaces, commonly in bathrooms or on plants. It often starts white or gray and may turn brown or black as it matures. You can sometimes wipe mildew away with a cloth and a cleaning solution.

Mold, in contrast, appears as fuzzy or slimy spots that can be black, green, blue, or even orange. It tends to grow in clusters and can penetrate into wood, drywall, or fabric. Mold stains are harder to remove and may require cutting out affected materials.

• Mildew is powdery and flat; mold is fuzzy or slimy.
• Mildew is usually white or gray; mold can be black, green, or colorful.
• Mildew often wipes off; mold soaks into porous surfaces.
• Mildew grows on surfaces; mold grows inside materials.
• Mildew is a type of mold, not a separate category.

Mildew loves warm, moist, and poorly ventilated spots, like shower curtains, window sills, and bathroom tiles. It also appears on fabrics left damp. You can often spot it as a thin, dusty layer that spreads quickly on organic surfaces.

Mold grows wherever moisture persists, including behind walls, under carpets, or in basements after leaks. It thrives on cellulose materials like paper, wood, and drywall. In humid climates, like the one in Columbus, keeping indoor humidity low helps prevent both.

If mold covers more than a small area, or if you cannot find the source of moisture, it is wise to get professional help. Water damage pros have tools like moisture meters to locate hidden dampness and can dry out structures with specialized equipment.

They can also help with structural drying and dehumidification after a leak or flood, which prevents mold from returning. If you have a burst pipe or flooding, acting quickly is key. In Columbus, you can reach out to the pros for an assessment.