How Many Types of Mold are There?

Most people have encountered mold in their homes before. Mold tends to thrive best when there is high humidity and mild, warm temperatures. This is why spores often take a liking to bathrooms and closets. Exhaust fans in the bathroom help to keep them at bay, but sometimes there is no avoiding the need for mold cleanup.

What Are the Different Types of Mold?

Over the years, you may have encountered so many different types of mold that you probably wondered how many there are. Mold gets classified into three main categories:

  • Toxigenic: As the most dangerous type of mold, this can lead to serious and even potentially fatal conditions. 
  • Pathogenic: Molds of this type tend to create problems for people who already suffer from pre-existing conditions. 
  • Allergenic: Even if you don’t have allergies, this type of mold could trigger allergic reactions and even asthma attacks.

Common Examples and How to Identify Them

Here are some of the most common types of mold. Also included is information on how to identify them.


This shows up most frequently in bathrooms. It is also commonly found on farms and is often resistant to fungicides. Some people describe it as hairy, and it is typically brown or dark green. This type of mold tends to signify a leak or water damage and spreads very quickly. From a health standpoint, it may increase the risk of asthma.


You most often encounter this type of mold in basements, on your roof, among pipes, and in drywall. It leaves a scent like rust in the air and has a cotton-like texture. It starts off as white but then begins to darken to black. It may also appear brown or grey during this darkening process. Touching this mold can lead to skin or nail infections.


If you suspect your carpet or wallpaper may be making you sick, this mold may be the culprit. Fabrics and paper are just two of its favorite hiding spots. It also grows on food and spreads rapidly. Colors include red, white, or pink. Minor exposure may cause allergic reactions and skin infections. Long term exposure can lead to far more severe consequences, such as brain abscess, bone infections, and internal bleeding.


While some molds are perfectly harmless, this isn’t one of them. Coming into contact with this toxigenic mold includes risks, such as impaired brain function and immune system diseases.

It can appear in a variety of colors, including grey, pink, white, and orange. Acremonium also grows in some of the most common household items. Take a good look at your cooling coils, humidifiers, and window sealants.


Commonly known as black mold, this is another toxigenic black mold that can lead to serious health conditions. Some of these include depression, bleeding in children, difficulty breathing, and neurological problems. It tends to show up in areas that have remained wet for long periods of time in warm conditions.


We have all seen this species of mold at some point. It commonly grows on bread, fruit, and cheese that has gone stale. Many people know that this is used to make penicillin, causing them to believe it is harmless. However, in this greenish or bluish form, it is allergenic and can cause respiratory illnesses.

Getting Rid of the Mold is How We Help!

Have you discovered mold in your home? Many people attempt to clean this mold away themselves. If you do, never breathe it in or clean it in such a way that the particles spread out into the air. If it is toxigenic, this may prove deadly for susceptible people in your home.

The only way to know for sure if this is harmful mold is to contact professionals who specialize in mold remediation. They can then follow the proper procedure to safely remove the mold from your home. Request a quote from Raysco, Inc. today.

Photo credit: By ivan_kislitsin

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