What Is the Difference Between Mold and Mildew?

What Is the Difference Between Mold and Mildew?

Mold and mildew are closely related, but the terms are often used differently when describing fungal growth around the home. Mildew generally refers to certain types of mold that grow on surfaces, while mold is a broader term covering many different types of fungi.

Both are associated with moisture and can appear in bathrooms, showers, basements and other damp areas.

What Is Mold?

Mold is a general term for fungi that can grow in damp environments.

Around the home, mold may develop on or around:

• Tile and grout

• Shower surfaces

• Bathroom surfaces

• Basements

• Concrete

• Walls and ceilings

• Areas affected by leaks or water intrusion

• Other damp materials and surfaces

Mold can appear in different colors and textures depending on the type of growth and the surface involved.

What Is Mildew?

Mildew is commonly used to describe surface fungal growth, particularly the type of growth seen in bathrooms, showers and other moisture-prone areas.

It may appear as a flat or powdery-looking discoloration on surfaces.

Because mildew tends to be associated with surface growth, it is often encountered during routine household cleaning.

Mold vs. Mildew: What's the Main Difference?

For everyday household cleaning, the distinction can be simplified:

Mold is the broader category of fungal growth.

Mildew is a term commonly used for certain types of mold that develop on surfaces.

Both can be signs that an area is experiencing excessive or persistent moisture.

What Causes Mold and Mildew?

Both mold and mildew thrive in environments where moisture is present.

Common contributing factors include:

• High humidity

• Poor ventilation

• Plumbing leaks

• Condensation

• Water intrusion

• Standing water

• Damp building materials

• Surfaces that remain wet

Bathrooms and showers are especially susceptible because they regularly experience warm, humid conditions.

Can Mold and Mildew Grow on the Same Surfaces?

Yes. Both can develop in many of the same moisture-prone areas.

Common locations include:

• Showers

• Bathtubs

• Tile

• Grout

• Bathrooms

• Basements

• Concrete

• Other damp indoor and outdoor areas

The appearance may differ, but the underlying moisture conditions are often similar.

Do You Clean Mold and Mildew the Same Way?

For routine staining on compatible household surfaces, the general approach is similar.

Start by selecting a cleaner appropriate for the surface.

Natural Armor All-Natural Mold & Mildew Cleaner is a ready-to-use, bleach-free formula designed to help remove mold and mildew stains from compatible surfaces.

Apply the cleaner according to the product directions, allow the recommended contact time, then wipe or gently scrub the surface as directed.

After cleaning, allow the area to dry thoroughly.

How Do You Keep Mold and Mildew From Coming Back?

Cleaning the visible staining is only part of the solution.

If the moisture problem remains, mold or mildew can return.

To help reduce recurring problems:

• Repair plumbing leaks

• Improve bathroom ventilation

• Use exhaust fans

• Reduce excessive indoor humidity

• Dry shower and bathtub surfaces

• Address condensation

• Remove standing water

• Correct water intrusion

• Improve outdoor drainage

Controlling moisture is one of the most important steps in preventing recurring mold and mildew.

When Is Mold More Than a Cleaning Problem?

Small amounts of surface staining may be handled as routine cleaning, but some mold problems can indicate a larger moisture issue.

Professional assessment may be appropriate when:

• Mold covers a large area

• Growth repeatedly returns

• Mold may be inside walls or ceilings

• Significant water damage has occurred

• Building materials remain persistently wet

A household surface cleaner isn't a substitute for professional remediation when mold contamination is extensive or hidden.