Black Mould: What You Need to Know

Black mould is a common household issue that can cause serious health and property problems if left untreated. It thrives in damp, poorly ventilated areas and can often be found on walls, ceilings, and floors in homes with high humidity. We will help you understand the risks of black mould, how to treat it, and also answer some frequently asked questions so you can work out the best course of action.

What is black mould?

Black mould, scientifically called Stachybotrys chartarum, is a type of fungus that grows in damp, dark areas. It usually appears as dark greenish or black spots on surfaces such as walls, ceilings, floors, and even furniture. While it may seem like a surface-level issue at first, black mould is actually capable of releasing spores into the air, which can spread throughout your home. These spores not only make the mould difficult to fully remove without addressing its source, but they can also pose significant health risks. If left untreated, black mould can cause both structural damage to your property and health issues for those living in the space.

 

Health impacts of black mould

 

Long-term exposure to black mould can trigger a range of health problems, particularly for individuals with respiratory issues, allergies, or weakened immune systems. Common symptoms of mould-related health issues include:

– Respiratory problems: Mould spores can irritate the respiratory system, leading to coughing, sneezing, wheezing, and shortness of breath.
– Eye irritation: Mould spores can cause red, itchy eyes, especially for those prone to allergies.
– Skin issues: Rashes or itchiness on the skin can develop after prolonged exposure to mould spores.
– Headaches and fatigue: Some people experience persistent headaches and feelings of fatigue when exposed to mould.
– Severe reactions: For those with asthma, allergies, or compromised immune systems, reactions to black mould can be particularly severe.

Improving ventilation and reducing moisture in your home are important steps in reducing these health risks. If you or anyone in your household experiences persistent symptoms, such as respiratory discomfort or skin irritation, and suspect mould could be the cause, it’s best to remove the mould and consult with a medical professional.

How long can you live with black mould?

 
There is no exact answer for how long black mould can be present in a home before it starts to cause serious issues. However, the longer it goes untreated, the more likely it is to negatively impact both your health and your property. Even if symptoms aren’t noticeable right away, mould spores can accumulate over time, worsening respiratory conditions and other health issues. Structurally, untreated mould can damage walls, floors, and ceilings, requiring more extensive repairs later. Therefore, addressing black mould as soon as it appears can prevent long-term health complications and avoid costly home repairs.

Is it safe to sleep in a room with mould on the wall?

 

Sleeping in a room with mould on the walls is unsafe, especially if you have allergies or respiratory conditions. Mould spores can circulate in the air, leading to coughing, congestion, and disturbed sleep. In more severe cases, prolonged exposure could lead to more serious health issues, like mould-induced asthma. It’s best to have mould treated immediately to ensure your sleeping environment is safe.

Can you remove black mould yourself?

Yes, you can remove small patches of black mould yourself, but only if it’s contained to a small area (less than one metre square). Use protective gear like gloves, goggles, and a mask, and clean the mould with a mixture of water and soap or a store-bought mould remover. However, it’s important to make sure you ventilate the room properly and dry the area thoroughly after treatment.

For larger mould infestations, professional help is recommended. DIY solutions may not address the underlying moisture problem, which can cause mould to return.

Does black mould ever go away?

No, black mould won’t go away on its own. Even if it seems to dry out or become less visible, mould spores can linger and grow back when conditions are right. To effectively remove black mould, you need to address both the mould and the underlying cause of dampness, such as poor ventilation or leaks. If left untreated, dormant spores can quickly spread, especially in humid conditions, creating a cycle of regrowth.

Can black mould be killed?

Yes, black mould can be effectively killed using proper cleaning agents and methods. Household products like bleach or specialised mould removers can be effective for small infestations. The key to preventing black mould from returning, however, lies in reducing moisture in your home. This may involve improving ventilation by using extractor fans, fixing any leaks, or even installing damp-proofing solutions. Consistent maintenance is essential for keeping mould at bay.

How to get rid of black mould