Types of Mold to Watch For

by Allied / Friday, 15 January 2021 / Published in Mold Remediation

By now, you probably know that mold is one of the most dangerous substances that can contaminate your home. Many types of mold are toxic and can cause serious mold related health problems. This is why it is crucial to identify the different types of mold growing in your home and eliminate them as soon as possible.

Mold infestation can be hazardous to children, older adults, pregnant women, and people with existing health issues. These people are especially vulnerable to the health risks that molds pose.

But mold growth can be risky to anyone, especially if the problem is left unaddressed. In this article, we go over the different types of mold that are commonly found in homes and the potential health issues that they could cause.

Mold Categories

Harmful molds belong into one of three categories:

Allergenic. These types of molds cause allergic reactions and are commonly associated with asthma attacks and other allergic reactions.

Pathogenic. These types of molds are known to cause health issues in people with acute illnesses.

Toxigenic. Also called “toxic mold”, these types of molds produce toxic substances that can trigger or contribute to life-threatening conditions.

Different Types of Mold

Certain types of mold are more likely to grow in your home than others. Here are the most common varieties of mold that you are likely to encounter at home.


Acremonium initially takes on a smallish and moist appearance and eventually turns powdery. It is typically pink, grey, orange, or white and is commonly seen on or near humidifiers, drains, window seals, and other home areas where condensation usually accumulates.

Acremonium is a toxigenic mold that can cause serious health problems, including bone marrow disease, weakened immune systems, and impaired organ function.


Alternaria is possibly the most common allergenic types of mold in existence. It is identifiable by its velvety texture and green or brown hair-like protrusions.

Like most types of mold, Alternariagrows in damp areas. You will commonly see it in baths, showers, and under sinks.

Alternaria causes various asthma-like conditions, typically affecting the nose, mouth, and upper respiratory tract.


Aspergillus is a fairly common type of mold characterized by long spores with a flask-like appearance. The individual spores typically form thick layers that extend in long, chainlike formations.

There are more than 185 different species of aspergillus. You will therefore see this type of mold in different colors.

Aspergillus is typically allergenic, but some species can be toxigenic. The toxicity of the mold could also be affected by the environment. Aspergillus can cause asthma attacks and lung and respiratory system problems.


Aureobasidium is another type of allergenic mold. It may be pink, brown, or black and usually grows behind wallpaper or even painted surfaces made of wood. As the mold ages, it may change color to a dark brown hue.

Aureobasidium is commonly associated with eye, skin, and nail infections. It also causes dermatitis, so it is best to avoid direct contact as much as possible.


Chaetomium is commonly seen in homes that have incurred extensive water damage. It is characterized by its cotton-like appearance and usually changes from white to grey and then brown and black. Chaetomium also gives off a characteristically musty smell.

Like Aureobasidium, Chaetomium is commonly associated with skin and nail infections. It could also produce mycotoxins that could cause severe health problems in people with weakened immune systems.

The Proper Way to Get Rid of Mold

If you have significant mold growth in your home, getting rid of the mold can be more difficult than you think. Apart from the challenge of identifying the mold, there is also the risk of health hazards associated with exposure. Most types of mold can be dangerous to be around and could lead to serious health problems.

The safest and most effective course of action would be to call in a professional mold removal service. Mold remediation specialists use special equipment designed to eliminate mold safely and reduce the risk of repeat growth. In most cases, the mold has spread to the extent that it has caused extensive damage. Before you can begin repairing and restoring your home’s damaged parts, you need to have a professional get rid of all traces of the mold and ensure that it doesn’t come back. Hiring a professional mold removal service will also keep you and your family safe from exposure as the problem is being dealt with.