7 Common Mold Types In Home

Mold is one of the biggest enemies of humans causing chronic breathing and respiratory issues. Mold spores are around us every day with the wind blowing them in every direction. The worst part about it is that mold comes in several different types. Each happens to be dangerous in its way and no one should be exposed to them for an extended period. So, we will show some common types of mold that can grow in homes so you can detect them early and call in mold remediation services before things get out of hand.

Mold Categories

Before we can discuss the common mold types in the home, it is important to become familiar with the mold categories as well. Mold is classified into three major categories i.e. allergenic, pathogenic, and toxigenic.

Allergenic mold is the least dangerous among the other types as it may cause mild allergies such as blocked noses or irritation. But that does not mean, one should be exposed to it for a long period. This is because if you already suffer from allergies, the mold will constantly trigger it and might cause a chronic health complication.

Next, pathogenic mold is a direct threat to an immune system that is compromised, weak, or suppressed. For some reason, this pathogenic mold happens to attack weak immune systems as well and can lead to serious health complications. That said, if you observe dizziness, shortness of breath, or other serious complications, you should get your house checked for mold.

Finally, toxigenic mold, as the term suggests, is highly toxic. Exposure to them can even lead to death in some cases. This is why homeowners must get their properties thoroughly cleaned and maintained every once in a while.


Acremonium mold colonies tend to be in gray, pink, or orange color. If you find them anywhere in the house, you will most probably observe them in a powdery texture that is moist. Generally, this type of mold is most commonly found in extremely wet conditions and areas. For instance, if your house was recently flooded due to heavy rain or a leaking pipe.

This mold type happens to be one of the most toxic and dangerous. These mold spores can enter the body via wound injuries and can cause marrow and immune system diseases. Plus, it could also result in brain function impairment. The most common symptoms in this case tend to be hay fever, asthma, and hypersensitivity.


Alternaria is really common and it also has more than 250 species. Indoor Alternaria tend to grow outdoors and multiply in number as they enter the house and stick to wallpapers, carpets, window frames, textile items, etc. This mold like other types also happens to grow in moist conditions.

However, it takes only five days for them to fully mature. Plus, this mold has a dark green texture or brown hair. The good thing about this mold is that people with asthma, weak immune systems, and pulmonary diseases are not in danger. But, prolonged exposure in children can lead to asthma complications.

Also, it can be hard to detect as it can grow under the carpet and inside the walls as well. You frequent cleaning and inspections are important to prevent this type of mold from growing in your house and causing various problems.


Aspergillus usually has off-while color when it starts growing. However, with more growth, the color may turn to brown, black, or yellow. The color can tell you about its species. You can notice them with their long pores and their layers.

It happens to be an allergic mold, which means that it will trigger allergies in individuals at most and cause lung infections, asthma, and respiratory inflammation. Furthermore, Aspergillus happens to grow in low-nutrient areas like windows, doors, and even pillows. And, plus, it becomes dormant in the winter season but grows rapidly in warm weather.

If you’re noticing it or any kind of thing that looks like mold, consult mold removal Gaithersburg services immediately to keep yourself and your family safe.


This type of mold is most common in moist and humid areas like the kitchen, bathrooms, caulking, behind the wallpapers, etc. This mold can also grow on most types of wood even if it’s treated. Aureobasidium is most commonly found in brown, pink, or black color and is often flat and smooth. But, with time, it can develop a velvety texture.

A primary concern related to this mold is that it can cause skin, eye, and nail infections. This means that this mold should never be touched with bare skin. Considering the fact that most homeowners are not able to identify molds, you might end up touching it.

If that is the case, you should immediately wash your hands with a disinfectant. Plus, it is not a human pathogen. Not everyone is going to become sick and will get exposed to it. However, babies and people with compromised immune systems are more vulnerable to it.


Chaetomium mold can be found on drywall, wallpaper, doors, cardboard, carpets, and other similar areas. This could be a concern for libraries and other such areas that house paper archives. It has a cotton-type texture, which is white in the initial stages and turns to gray and brown eventually into black with time.

This mold is both pathogenic and allergenic and causes skin and nail infections. So, if you have this type of mold in your house, you are going to have a serious problem dealing with it. This is because Chaetomium spores are relatively heavier and larger.

It is also a sign of constant moisture, which means you need to check the water lines, roofs, and basements.


Mucor is yet another type of mold that is typically found in gray, white, or cream-beige color combined with a cotton texture. This mold spans across 50 species and grows in scattered or thick patch colonies. Plus, mucor tends to thrive on mattresses, carpets, and upholstered furniture.

Mucor can provoke and trigger allergic reactions and respiratory problems like coughing, sneezing or even causing a runny nose with a sore throat and itchy eyes, etc. In severe cases, it can also cause infection and damage to your eyes, lungs, and brain. This mold is commonly found in areas or buildings that were recently flooded.


Cladosporium is one of the most popular types of household molds with over 220 species. The majority of these species appear brown, black, and olive green and tend to grow both in warm and cold conditions. Plus, this type of mold thrives in upholstery, carpet fabrics, etc.

It can also cause irritations to the skin, nose, eyes, and throat. As for the symptoms, you will observe rashes, lesions, and lung infections. Although it’s not that deadly, it should not be dealt with without protective gear.


In the end, molds tend to be a threatening factor for people living in the house. The information mentioned above will help you identify the type and deal with the matter accordingly. Moreover, you should also hire a water damage restoration Silver Spring expert and have your house thoroughly cleaned after a leakage or flooding to prevent mold from growing.

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