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Are There Different Types of Mold?

Mold thrives in environments that are damp, dark, and temperate. Thus, the home is often the perfect breeding ground for it. It’s absolutely crucial to be able to recognize the signs of mold, understand the potential health risks it poses, and eradicate it immediately. Certain kinds of mold can cause breathing problems, allergies, increased illness, or even death.

While some simply understand mold to be just one thing that needs to be eliminated, that’s unfortunately far from the truth. Mold exists in many different forms and may have different risks depending on the type. For the sake of this article, we are going to focus on how to identify the kinds of mold that are commonly found in households so that you can keep yourself and your family safe.

Here are 8 of the most common kinds of household molds.

1. Alternaria

Alternaria is the most common type of allergenic mold found in homes. You can find it growing in any spot where dampness naturally occurs. This means areas like showers, sinks, and bathtubs are prime targets. You’ll be able to identify it by its velvety texture and green/brown hairs. It causes asthma-like symptoms and is important to eradicate quickly because it will spread rapidly.

2. Acremonium

Acremonium is a toxic mold that changes in appearance over time. The small, moist mold will eventually become a large powdery substance in pink, grey, white, or orange. It’s typically found in systems like humidifiers, drain pans, window sealants, or cooling coils.

Exposure to this kind of mold can be very dangerous. It can lead to diseases of the organs, immune system, or bone marrow. It is also a carcinogen that increases the risk of cancer and can impair brain function.

3. Aspergillus

Commonly found in American homes, this mold can form thick layers of many different colors due to the 185 species of Aspergillus that exist. It’s allergenic but can become more toxic depending on the species and location. At its worst, it can lead to asthma attacks, respiratory infections, or inflammation and lung infections

4. Chaetomium

This is commonly found in buildings that have suffered water damage. It’s often found in roofs, basements, pipes, or attics. It has a texture similar to cotton and can change colors over its lifespan. Usually, it will start as a gray color and move to brown and eventually black.

It can cause nail or skin infections but can sometimes produce mycotoxins that are especially dangerous to those already compromised with immune disorders.

5. Fusarium

Fusarium is unique in that it can spread in especially cold conditions.  It is both allergenic and toxigenic, growing in homes with water damage just like Chaetomium. You’ll typically find it under carpeting, wallpaper, or other fabrics. Naturally, it grows on food and compost. You’ll recognize it by its pink, white, or red coloring.

It can cause skin infections and respiratory problems, but prolonged exposure can lead to bone or brain issues. It’s capable of producing nervous-system-damaging toxins and will spread from room to room quickly, so it’s important to treat quickly.

6. Mucor

Mucor is an allergenic mold that you’ll find in thick patches around your home. It likes air conditioning units, HVAC systems, and internal ducting because of the condensation that occurs in these parts.

It especially affects the respiratory system, making pre-existing asthma worse or causing asthma symptoms in those previously unaffected. In severe cases, it can cause a serious fungal infection called Mucormycosis that can damage lungs, sinuses, and the brain. This risk makes the removal of Mucor absolutely vital.

7. Penicillin

Penicillin is easily recognizable because of its blueish green coloring and velveting texture. It’s often found in buildings with water damage underneath carpets, wallpapers, and even mattresses.

Penicillin is responsible for important antibiotic and food processing purposes in other forms, but when found growing in the home, it can be the cause of terrible respiratory issues. It easily becomes airborne and can spread rapidly from room to room. When untreated and exposed for prolonged periods, it can cause chronic sinusitis.

8. Trichoderma

Trichoderma is an allergenic mold that is typically white and green in color with patching. In grows on wet surfaces, moist areas, and loves damp fabrics. Its five different sub-species grow rapidly as a wooly texture and then become compact as time goes on.

Most types are non-pathogenic, but a few kinds have been linked to heart and liver infections. Not only is it damaging to humans, but it is also very bad for building structures. It can destroy wood, paper, and textiles easily. This leads to rot and crumbling, which threaten the integrity of the structure all together. These infestations must be immediately treated with professional help.

Mold Treatment

If you suspect any of the above molds growing in your home, get professional help as soon as possible. Our All Dry USA mold removal experts can treat your affected areas and get your home back in a healthy condition in no time. Call us today to schedule your mold remediation service.


Ben Suiskind

Chief Executive Officer at All Dry USA
With Ben’s knowledge, and visionary leadership, All Dry USA has expanded into a national, full-service property damage restoration company with multiple locations across the United States. Ben holds numerous specialty licenses and certifications in restoration and construction.
Ben Suiskind

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