Black mould dangerous to your health? It can be — and many Ipswich homeowners don’t realise the risks until the problem is well established.

Mould spreads through tiny airborne spores, which means you can breathe it in and won’t even know. This is a concern, as black mould can be a health hazard if you are exposed to it over a long period of time or have existing health conditions. The risks vary depending on the amount of mould and where it’s growing.

In this guide, we’ll explore what black mould is and what to do if you find it in your home. We’ll also investigate the link between black mould and health.

Let’s get started.

What Is Black Mould, and Why Does It Grow Indoors?

Black mould is the common name for several species of mould that appear dark green or black when growing. The most well-known type is Stachybotrys chartarum, which can produce toxins in certain conditions. But not every dark mould is toxic, and not all mould causes health problems.

Indoors, black mould grows in places with too much moisture and not enough air circulation. Bathrooms, kitchens, garages used for storage, and areas around windows are common spots for this mould to thrive. You might also find it on carpets, drywall, or furniture after a leak or a flooding event.

Mould needs two things to grow:

Moisture
Time

Poor ventilation, condensation, plumbing leaks, or damp building materials can all create the right conditions for mould to spread.

Health Risks and Dangers of Black Mould in Homes

Is black mould dangerous? It can be when exposure lasts weeks or the mould returns over and over again.

The health risk rises when mould grows where you can’t see it or releases spores into the air you breathe. You do not need to touch mould for it to affect your health either. Airborne spores spread through open doors and shared wall spaces. Hidden growth behind drywall or under flooring causes the longest exposure because it goes unnoticed.

Short exposure may cause mild irritation. Repeated exposure can lead to ongoing symptoms that wear you down and leave you feeling unwell for seemingly no reason. This risk depends on how much mould is present and how your individual body reacts.

Some people are at a higher risk of black mould poisoning. For example, infants and children breathe faster, so they absorb more spores. Older adults might recover more slowly too. In addition, people with asthma, allergies, or weakened immune systems can have stronger or more severe reactions.

Black mould becomes a serious issue when it spreads in large areas and produces a strong musty smell. It’s also a concern when it returns after cleaning or appears near visible water damage or leaks.

Signs and Symptoms of Black Mould Exposure

Symptoms from black mould exposure share many similarities with allergies or a cold. For this reason, many people dismiss the early warning signs. The key difference to watch out for is the timing of your symptoms. Do they go away when you leave the space with mould and return again when you come back? If so, the mould could be the cause.

Symptoms of black mould can include the following:

Nasal congestion or sinus pressure that persists indoors
Ongoing coughing or throat irritation without infection
Headaches, brain fog, or low energy during the day
Skin redness or itching after time in the affected area

Some people also notice eye irritation or shortness of breath during sleep. Children may seem more tired or irritable than usual. Pets can also experience black mould poisoning. They might start sneezing or scratching at their skin. They might even avoid a certain room or space in your home as well.

In most cases, the symptoms of black mould resolve themselves when you are no longer exposed and the source of the mould is taken care of. If, however, they continue longer-term, there could be some kind of ongoing exposure somewhere else in your property.

What to Do if You Find Black Mould

If you find black mould in your home, don’t rush or panic-clean it. Mould spores are what cause the problem, and they’ll become airborne the moment they are disturbed. Your goal is, therefore, to keep the area as undisturbed as possible until you know the full extent of the problem.

Follow these steps:

Step 1: Do not touch or clean the mould. Scrubbing can release spores into the air and make the problem worse. Close all windows in the room so spores don’t spread through airflow.
Step 2: Identify and stop the moisture source. Mould won’t go away unless the moisture feeding it is gone for good. Check for leaks or signs of condensation and have the root issue repaired.
Step 3: Improve air circulation in the area. Use extractor fans or open windows in other parts of the house to reduce humidity. Try not to use any fans near the mould itself, as that can spread the spores.
Step 4: Contact a professional mould remediation service. For anything larger than a patch you can wipe from a nonporous surface, expert removal is the safest next step. This is even more important if the mould continues to return or you know you’ve had water damage. Expert assistance can reduce the risk of health effects and prevent damage to your home.

Can Black Mould Be Safely Removed?

Yes, but how you remove it depends on how far it has spread and where it’s growing.

Surface mould on nonporous materials like tile or glass can usually be cleaned with proper safety measures. But mould that’s taken hold in drywall or wood framing, as examples, is harder to treat. These materials absorb moisture and allow mould to grow deeper, out of sight.

Many people reach for bleach, but bleach doesn’t work well on porous surfaces. It might remove surface stains, but it won’t reach the mould roots inside the material. This can lead to regrowth days or weeks later.

Professional mould remediation is the safest option for large or recurring patches. A qualified team can assess hidden damage. From there, they can contain airborne spores and remove contaminated materials.

If you try to remove mould yourself, wear protective gear and never dry-scrub. But if there’s any sign that the mould has penetrated behind walls or returned after cleaning, it’s time to bring in professionals who can do the job thoroughly.