What's the Difference Between Mold and Mildew?

Mildew tends to look like a flat, powdery or downy patch, often gray, white, or yellow. You might see it on shower walls, window sills, or damp clothes. It stays on the surface and can often be wiped away with a cleaner.

Mold appears as raised, fuzzy, or slimy spots, usually black, green, or brown. It can grow into porous materials like drywall, wood, or carpet, causing more damage. If you see a dark, textured patch that spreads, that is more likely mold.

Mildew prefers damp, warm surfaces with little air movement, such as shower curtains, window frames, and indoor plants. It thrives on organic material like paper or fabric. A musty smell often accompanies mildew growth.

Mold can grow almost anywhere moisture collects, including behind drywall, under flooring, or in attics. It spreads through roots that penetrate surfaces, making it harder to remove. Check hidden areas after a leak or flood, as mold can develop within days.

The right way to prevent both mold and mildew is to control moisture. Use exhaust fans in bathrooms and kitchens, and wipe down wet surfaces after use. Fix any leaks in roofs, pipes, or windows quickly.

In areas with high humidity, consider a dehumidifier for damp basements. Regularly inspect spots prone to moisture, such as under sinks and around windows. Acting early can stop a small spot from becoming a bigger problem.

• Run exhaust fans during and after showers
• Dry wet clothes and towels promptly
• Insulate cold pipes to reduce condensation
• Check attic and crawl spaces for leaks
• Clean spills and dry affected areas within 48 hours