Mold vs Mildew: Easy Guide for Kids and Parents

What Is the Difference Between Mold and Mildew?

Mold and mildew are types of fungus, and they love moisture. You can find them growing in your bathroom, basement, or even on your clothing. They may look alike, but mold vs mildew have big differences in how they grow, smell, and affect your health.

Mildew usually looks white or gray and stays flat. Mold is often green, black, or even orange and gets fuzzy or slimy. Both love dark, wet places. Yuck!

Where You Might Find Mold and Mildew

In the Bathroom

The shower, tile, and bathtub are perfect places for mildew to grow. If you see black or gray spots, it might be mildew. Mold may show up on the ceiling if there’s poor ventilation.

In the Basement or Attic

If your basement or attic feels damp or smells musty, mold or mildew might be hiding. Poor airflow and high humidity create a happy home for fungus.

In the Kitchen and Laundry Room

Behind the washing machine, under the sink, or near the clothes dryer, mold and mildew can grow if there’s a leak or too much condensation.

What Causes Mold and Mildew?

While water damage categories address the contamination level, water damage classes focus on the amount of water absorption and the potential for damage to various structures and materials. The class system helps restoration professionals determine the extent of saturation and the necessary drying equipment to be used. Classes vary depending on the types of materials affected (e.g., porous or nonporous surfaces) and the overall impact on the building’s structure. This distinction is critical for planning an effective remediation process and ensuring that drying is both efficient and sufficient to prevent mold and further degradation.

Water Damage and Leaks

Mold and mildew grow after a flood, leaky roof, or plumbing issue. Water damage makes drywall, wood, and even carpet damp enough for fungus to spread.

High Humidity

Too much humidity indoors makes it easy for mildew and mold growth. A dehumidifier helps by pulling extra moisture from the air.

Poor Ventilation

No fresh air? That’s a problem! Bad ventilation traps moisture, especially in bathrooms, laundry areas, and the kitchen.

What Does Mold Look and Smell Like?

Mold can be black, green, yellow, or even white. Some types, like stachybotrys, are very dark and slimy. Others, like penicillium, are blue-green and fuzzy.

Mold smells bad. It has a strong, musty odor—kind of like old, wet towels or paper.

What Does Mildew Look and Smell Like?

Mildew is usually gray, white, or light brown. It’s flat and powdery. Ever heard of powdery mildew or downy mildew? Those types can also grow on plants, leaves, and soil.

Mildew has a lighter smell, but it still isn’t pleasant.

Health Problems from Mold and Mildew

Allergy and Irritation

Mold and mildew can cause allergy symptoms like sneezing, itchy eyes, and skin rash. Some people feel a sore throat or irritation when breathing moldy air.

Breathing Issues

Mold can hurt the lungs, especially if you have asthma. It affects your respiratory system and can make you cough or wheeze.

More Serious Health Risks

Some molds release mycotoxins, which may lead to toxicity or even disease. These can damage your body if you breathe them in for too long.

Mold and Mildew in Your Home

On Surfaces

Mildew and mold love soft stuff like upholstery, carpet, and clothing. They also grow on hard surfaces like tile, floor, desk, and ceiling.

On Plants

Powdery mildew and downy mildew often grow on leaves, roots, and seeds. They look like a dusting of powder and can hurt your plants.

How to Remove Mold and Mildew

Use Vinegar or Bleach

To clean mildew, mix vinegar or bleach with water. Always wear gloves and open windows for airflow. Use a brush or sponge to scrub the area.

Never mix bleach and vinegar together—it can make dangerous fumes!

Wash Clothes and Towels

Put moldy clothes, towels, or upholstery in the washing machine with hot water and vinegar. Dry them fully to stop the mold from coming back.

Call for Mold Remediation

If mold covers a large area or is in your walls, call a mold remediation expert. They’ll do a full mold inspection and use special tools to remove mold safely.

How to Stop Mold and Mildew from Growing

Control Moisture

Keep your home dry. Use a dehumidifier if it feels damp. Fix plumbing leaks quickly. After a flood, dry all wet areas fast to stop mold growth.

Improve Ventilation

Use fans and open windows. Install vents in the bathroom, attic, and kitchen. Good airflow helps dry wet spots and keeps mildew away.

Use an Air Purifier

A good air purifier can trap mold spores in the air. It helps with indoor air quality, especially if someone has asthma or allergies.

Keep It Clean

Clean bathrooms, kitchens, and basements often. Watch for stains on drywall, wood, or ceiling tiles. If you see any signs, clean them right away!

Common Places People Forget to Check

Behind the toilet
Inside ducts
Under flooring
Around windows
In the closet
Behind furniture
Near the roof or attic

Mold can hide! Doing a full check every season can stop a small problem from becoming a big one.

FAQs About Mold vs Mildew

What’s worse for your health: mold or mildew?

Mold is usually worse. It can cause asthma, lung problems, and even serious disease. Mildew can cause allergies but is less dangerous.

Can mildew turn into mold?

Not really. They’re different types of fungus, but they grow in similar places. However, both can be found together in damp areas.

How can I tell if it’s mildew or mold?

Mildew is flat and light-colored. Mold is darker, fuzzier, and smells stronger. Mold also grows deeper into surfaces like wood or drywall.

Does bleach kill mold and mildew?

Yes, but only on hard surfaces. Bleach doesn’t always kill deep mold inside walls, flooring, or carpet. Use vinegar for a safer option or call a pro.

What is the best way to prevent mold and mildew?

Keep your home dry and clean. Use a dehumidifier, fix leaks, and make sure you have good ventilation. This helps stop mold before it starts.

Eric Allison

Eric Allison is a seasoned professional in property restoration, serving as the primary contact and founder of Preferred Restoration Services, LLC, based in Tustin, California. With a career spanning over two decades, Eric has developed extensive expertise in addressing fire, water, and mold damage, ensuring properties are restored to their pre-loss condition.

Mold Removal

      EXCELLENT  
   Based on 62 reviews 
    
 
 
 
   
 
 
       Posted on Yelp  
   
   Michelle D. 
 April 23, 2025
 
 
 Verified A straight up honest broker who knows his stuff.  Excellent communication and very helpful problem solving our mold issue
  
 
      Posted on Yelp  
   
   Jessica M. 
 April 1, 2025
 
 
 Verified Giving Eric a 5-star review, and we haven't even started any work yet. He came to gave us his professional opinion and quote to address a mold issue in our house. He is clearly very knowledgeable. His opinion was wildly different than the previous estimate we received, from an agency that wanted to charge us about 4 times as much. He did a much more thorough assessment, and explained his reasoning for why he felt that our issue wasn't as extreme as the previous agency. He even gave us some suggestions as to how we could address our issue on our own, if need be. He doesn't appear "out to get you"... there are a lot of companies that work off the "mold is gold" motto, but he doesn't seem to be one of them. If we end up going with him for the job, we'll update the review... but, I was just so happy and relieved with his approach, estimate, knowledge, and his overall professionalism. Glad there are still people like this out there!
  
 
      Posted on Yelp  
   
   Ben T. 
 March 10, 2025
 
 
 Verified Eric and his team were prompt and professional. From diagnosis through cleanup they were very thorough.
  
 
      Posted on Yelp  
   
   Julia H. 
 March 7, 2025
 
 
 Verified Above and beyond expectations. Eric and his team were not only helpful, kind, and relatable to our issues, they were extremely professional and reliable. Always answered our calls. Showed up on time with great attitudes. Respected our home. Most importantly, got the job done in a fast and timely manner. Can't recommend enough.
  
 
      Posted on Yelp  
   
   Lorraine R. 
 March 2, 2025
 
 
 Verified We had a leak under the kitchen sink and called another company first. We were told there is mold and they would have to tent the area to remove it and that we'd also need a whole new cabinet. Of course, it was pretty expensive and they said we couldn't use the kitchen for a couple weeks. Feeling it's always wise to get more than one estimate, I called Preferred Restoration as they had excellent reviews. Eric replied promptly and came out to look things over. He felt the mold wasn't bad enough to require a tent and also felt a whole new cabinet was not required. Needless to say, we accepted his estimate immediately and the work was done in a professional manner. (They don't do the carpentry work, but can make a recommendation.) I highly recommend Preferred Restoration. I believe it's an honest company with skilled professionals.
  
 
      Posted on Yelp  
   
   William P. 
 January 31, 2025
 
 
 Verified Eric the owner was great to work and keep me informed the entire time that the moisture was being removed from my home. Highly recommend Eric and his team for any job!
  
 
      Posted on Yelp  
   
   Elizabeth R. 
 January 3, 2025
 
 
 Verified Right from the start I knew I was going to be in good hands with this company. The response time was super quick and getting Eric to come out to my home to assess the situation was quicker than expected. Eric was very knowledgeable and answered all my questions thoroughly. He took his time to listen to all my concerns to carefully address the issues in my home. He made a stressful situation feel less stressful and manageable. I definitely recommend this company and will contact Eric if needed in the future. Thanks again Eric!
  
 
      Posted on Yelp  
   
   Binh N. 
 December 5, 2024
 
 
 Verified We discovered a mold issue in one of our bedrooms and reached out to Preferred Restoration Services for guidance. Eric was extremely helpful in helping us navigate what needed to be done since we had no experience with this type of issue. He shepherded us through the process and helped us understand every step that needed to be performed. He referred us to a couple of contractors which we used for plumbing and testing and they were also excellent. This was helpful so that we didn't have to figure out who else we needed to work with and vet them as well. Everyone from Preferred Restoration Services was very professional, communication was excellent, and customer service was outstanding. We had a lot of questions and they were all answered very quickly. I highly recommend Preferred Restoration Services for any damage restoration needs.
  
 
      Posted on Yelp  
   
   Tyler H. 
 November 23, 2024
 
 
 Verified Preferred Restoration is the best service in town! If you want quality, fair pricing & guidance, call Preferred Restoration!  Ask for Eric, he is very helpful and quick.
  
 
      Posted on Yelp  
   
   Phil L. 
 November 1, 2024
 
 
 Verified We had an issue with a sewer line that leaked and potentially needed some soil remediation under the house.  I gave Eric a call and made an appointment for the next day for him to come out and assess the situation.  Throughout the process his communication was great and he was on time (even gave me a call to let me know he was on his way).  He went above an beyond to even check inside the house for potential water damage/mold.  We did not have to move forward with any remediation. I appreciate Eric's communication, thoroughness, and HONESTY.  We will keep his contact if we need any work in the future.  I highly recommend Eric and Preferred Restoration!