How Does Black Mold Form?

“Most people are aware of black mold; however, they are not familiar with its health or property effects. All around us are airborne mold spores. A house with moisture problems, leaky pipes, leaking roofs, condensation problems in walls and attics—or any combination of these—is more likely to develop mold.”


How Does Black Mold Form?


Mold comes in many colors and types, and each can harm your health and home. Technically, black mold is not just one kind of fungus but rather several different types. Let’s know all about how does black mold form.


Black mold: How does it form?

Various sources can lead to black mold growth. Moisture and cellulose-rich items like paper or cardboard make it thrive. Black mold can also be found in foods high in cellulose but with a low acidity level (for example, nuts).

Mold can also grow in warm and moist areas of the house, such as basements, showers, crawlspaces, and especially windows. It can form if leaky pipes or ventilation do not work properly.

If you suspect leaks, the best way to determine if you have leaky pipes in your house is to thoroughly inspect your basement for mold. Also, check corners, showers, and crawlspaces to see if your ventilation could be more efficient. If left unattended, the damage to your home will be severe.


Does my house have moisture problems?

Humidity is a good indicator. Moisture is likely to be a problem in a house with high humidity. Mold, mildew, and rot are all signs of musty odors. Too much moisture may be causing household odors to linger. It is also possible for ice and frost to form on cold surfaces due to condensation.


Different types of mold to look out for

Molds come in various forms, some blackish and patchy, others green and textured. Knowing where mold grows in the home can help you stop the problem at its source and avoid constantly trying to eradicate it. Mold can cause house health problems, so be aware of these types.



Usually, Alternaria has a velvety texture and dark green or brown hair. The mold of this type usually grows in damp places such as showers, tubs, and sinks that leak. When you spot it, remove it immediately since it spreads rapidly.

Health hazards: Alternaria causes asthma-like symptoms in the nose, mouth, and upper respiratory tract.



As it ages, Aureobasidium usually turns a darker brown color, starting as a pink, brown, or black color. Many molds grow on walls, including black mold, commonly found behind wallpaper or on painted surfaces.

Health hazards: There is a chance of getting an infection from Aureobasidium when it comes to bare skin.



Molds that grow in Cladosporium have a suede-like texture and are greenish-brown in color. They can grow regardless of the climate under flooring, inside cupboards, in upholstered furniture, fabrics, and carpets.

Health hazards: Cladosporium may worsen asthma and sinusitis symptoms because it causes allergic reactions to the eyes, nose, throat, and skin. It is unsafe to handle Cladosporium directly because of its potential to cause skin and lung irritation.



Penicillium varies in color from blue to green and has a velvety texture. It appears on wood, carpets, wallpaper, mattresses, and spoiled food. It reaches its peak growth in January and February.

Health hazards: Spores from Penicillium can become airborne and be inhaled by homeowners, causing asthma and sinus infections. The medication can worsen the symptoms of weakened immune systems and cause further health complications.


Black mold (Stachybotrys)

What is the cause of black mold? Slimy and dark green are easily confused with dirt because of their slimy texture. In most cases, black mold occurs due to high humidity and damp conditions.

Black mold is common on windowsills with high humidity levels, such as bathroom windows. It also grows on paper, wood, and aluminum wicker.

Health hazards: A specific strain of black mold called Stachybotrys may cause burning sensations in the airways, nose bleeding, fatigue, sinusitis, fever, headaches, and a persistent cough for those exposed.

Children are particularly susceptible to Stachybotrys, so seek professional help when you find them in your home.


Common effects of black mold exposure.

People with mold allergies may develop health problems if exposed long-term to toxic black mold mycotoxins. Mold produces toxic substances called mycotoxins. Black mold exposure can lead to the following symptoms:

  • Having difficulty breathing, wheezing, and coughing
  • Anxiety, fatigue, and headaches
  • Loss of memory
  • Hives or rashes on the skin
  • Drainage and congestion of the nose
  • Sneezing, sore throat, or sinusitis
  • Reactions to allergies or symptoms of allergies

Depending on the individual, mold spores may be more irritating due to allergies or weakened immune systems. People with mold sensitivity may experience noticeable effects from exposure, while others may not.

Untreated mold growth can lead to toxic mold syndrome. Black mold symptoms go unnoticed by people unaware of the cause.

They think they have seasonal allergies, the flu, etc. Physical and neurological complications can result from this. Whether you are experiencing black mold symptoms or not, you should immediately act if you discover mold in your home.

If you suspect mold, wear protective gear to avoid exacerbating health problems, and call a professional to remove it.


Where does black mold grow in homes?

A warm, humid climate with little air circulation is conducive to black mold growth. Basements, crawlspaces, walls with moisture problems, insulation, roofs, air conditioners, and any other place where moisture accumulates are favorites of this fungus.

Despite the need for water or humidity to grow initially, black mold will not survive if not exposed to it for a long period. In the interior and exterior of homes, cellulose is the most important ingredient for toxic black mold growth.

If you leak into your home – be it a roof leak, pipe leak, or any other leak source – this can lead to black mold spores taking over if left unattended. Most likely to see black mold growth are flooded or suffered water damage, particularly homes that were flooded and neglected to dry thoroughly and quickly enough.

A black mold problem must be found not only at its source but also at its origin. Without locating the source, mold may regrow and spread.


How Do You Treat Black Mold Growth?

Identifying the source and the actual mold is the first step in treating black mold. If mold is visible on or in your walls, please do not disturb them, as the spores can become airborne and contaminate the air even more.


How Do You Treat Black Mold Growth?


A professional must take care of mold growth because of the potential health risks involved if you suspect mold growth. Our technicians have the tools and knowledge to identify black mold and safely remediate it.

You can take some steps to remediate black mold in areas smaller than 10 square feet of your home. Professionals would use different techniques. Wearing proper Personal Protective Equipment (PPE) around the black mold is important. This includes gloves, eye protection, and an N-95 mask.


How do you prevent black mold?

Keeping your home dry and controlling moisture levels is key to preventing toxic black mold. To prevent condensation, keep the indoor humidity level at 30% to 50%, reduce humidity, and ventilate heat-generating appliances. Repair any water damage or leaks immediately in the walls, roof, gutters, and plumbing pipes. When repairing drywall, sheetrock, or paint, use mold-resistant materials.

When wet areas in your home receive moisture, mold can grow. As a result, preventing mold growth begins with adequate ventilation. You can prevent hidden mold from developing indoors by flood-proofing your property and maintaining adequate airflow.

Remember to ignore discolorations or musty smells in your home if you notice them. Ensure that no further black mold exposure occurs before we need professional remediation.

Your future repairs will be easier and cheaper if you prevent them from happening in the first place. Taking proper precautions will ensure mold and mildew won’t return to your house in the future.


Let the light enter your home.

Keeping your curtains open throughout the day will allow natural light and fresh air to enter your home.


Keep air moisture to a minimum.

The key to mold prevention is keeping air moisture to a minimum. Ensure your walls, ceilings, and windowsills are dry of condensation. We can also remove moisture from the air with dehumidifiers.

When cooking, ensure your windows are open and your bathroom and kitchen doors shut tightly.


Cleanliness is key

Regular dusting, hovering, and cleaning are essential to preventing fungus from growing. Wash and clean organic materials regularly. Mold and mildew grow on organic materials such as wood, cotton, and cardboard.

Replace anything made from cardboard, wash fabrics, and clean wooden surfaces. To help prevent mold from returning, change your shower curtains regularly.


Ensure your home is well-ventilated

Proper ventilation is required to control dampness. Controlling your home’s humidity will help you avoid condensation issues.


Say goodbye to moldy things.

Getting rid of moldy things can sometimes be the best thing for the environment. In the case of mold, carpet, drywall, and wood must be removed.


Keep your home sealed from water.

To prevent mold growth, install new or repair damaged gutters to prevent water from entering your home. You should also maintain the seals around your windows, pipes, and doors in good condition so your home will remain watertight.


Keep your home well-insulated

You can reduce air humidity and condensation levels and avoid mold growth.


Time to call in the professionals

Brickwork damage or leaked pipes inside walls are two common causes of mold that a professional should take care of. If your property suffers from rising dampness, a damp-proof course is best added. The barrier will prevent the ground from absorbing water.

Recognizing and removing fungi as soon as possible in your home is crucial to preventing mold from growing and worsening. This guide aims to help you identify the risks and solutions associated with household mold.


Black mold questions are frequently asked.


Black mold: What happens if you breathe it?

People sensitive to mold may experience allergic reactions, such as sneezing, runny nose, red eyes, and skin rash, after inhaling or touching mold spores. Breathing in large amounts of mold for an extended period can cause allergic reactions, cold symptoms, or more serious side effects like fatigue, brain fog, or even mold growth in the lungs and respiratory system.


Is black mold dangerous?

All molds are potentially dangerous if they get into your body, whether black mold is more or less dangerous than other types.


How can we get rid of black mold around the windows?

You can remove black mold from your windows like any other mold with bleach or vinegar.


What happens if you touch black mold?

Some people can develop serious health problems due to black mold, including allergies. Before deciding on any course of mold infection treatment, it is important to determine how much exposure you may have had in the past.


What happens if you breathe in black mold?

If you experience any symptoms, they are usually cold/allergy-related. A strong immune system should not be adversely affected by short-term exposure. A compromised immune system, allergies, or severe respiratory issues can lead to serious health problems.


How can we recognize the difference between mildew and black mold?

In contrast to mildew, mold is typically taller and even fuzzy. Mildew begins as white, then turns brown or gray as it matures. Mold exhibits dark colors like deep green and black. Mold never turns into a white powder; mildew does.


Can black mold kill you?

Generally, no. However, some people are susceptible to mold-related illnesses or deaths, including the elderly, the very young, and those with serious respiratory issues such as COPD or cystic fibrosis.


How do we identify black mold?

Compared to many other molds, black mold is a dark color with a slimy and wet appearance. Clusters of small dots appear when it grow in small clusters. Water damage is often visible near mold damage. Nearby, you will also smell musty.


Is black mold dangerous?

All molds pose a potential danger. Mold, regardless of type, can cause illnesses of varying severity, but black mold isn’t any more dangerous than any other type.


How and why does black mold grow?

Black mold can grow anywhere, including in excess humidity and standing water. If your home has been damaged by water, its structure may be weak, causing humidity to increase.



Black mold and other types of mold are very difficult to remove. Mold is toxic to all family members, regardless of whether it is black or other types! If you find mold, it should be removed from your home by a professional mold removal service.