Difference Between Mold and Mildew
Mildew is a surface fungus that is flat, powdery, white or gray, and grows on damp surfaces. Mold grows in and under surfaces, appears fuzzy or slimy, comes in various colors, and can cause structural damage. Mildew is easier to clean; mold often requires more aggressive treatment.
Key Takeaways
- Mildew is technically a type of mold but is commonly distinguished as a surface-level fungus.
- Black mold (Stachybotrys) is particularly concerning and often requires professional removal.
- Both mold and mildew can trigger allergies and respiratory issues in sensitive individuals.
Explanation
Mildew is technically a type of mold but is commonly distinguished as a surface-level fungus. It appears powdery or fluffy, usually white, gray, or light yellow, and grows on damp organic materials like paper, fabric, leather, and bathroom surfaces.
Mold is a broader category of fungi that grows deeper into materials. It can appear in many colors - black, green, red, blue - and has a fuzzy, slimy, or even hairy texture. Mold penetrates porous surfaces and can cause structural damage to buildings.
Mildew is generally easier to remove with household cleaners and scrubbing. Mold, especially on porous surfaces, may require specialized products, professional remediation, or removal of affected materials. Both indicate excess moisture that should be addressed.
Things to Know
- Black mold (Stachybotrys) is particularly concerning and often requires professional removal.
- Both mold and mildew can trigger allergies and respiratory issues in sensitive individuals.
- Mildew on houseplants (powdery mildew) is a different fungus from bathroom mildew.