Get rid of green mould | Causes, risks and prevention

Is green mould a common issue?

Green mould in the home is a common problem often confused with algae or other types of mould. Although green mould is well-known from certain foods, such as blue cheese, it is entirely different when it appears in your home.

It can cause both health issues and structural damage, making it important to understand what it is, how it spreads, and how to handle it.

Green mould in the home can be a mixture of several different mould species, making it more difficult to identify without a proper analysis

What is green mould and where does it come from?

Green mould is not a single species but a collective term for mould fungi that appear in green shades. Many mould fungi, such as those from the Penicillium and Aspergillus genera, can show green colours depending on the environment and growth conditions. Green mould in the home can also be a mixture of various mould types, making identification difficult without thorough analysis.

Green mould typically grows in damp, poorly ventilated areas like basements, kitchens, bathrooms, or attics. It is especially common on walls, ceilings, grout, or furniture exposed to moisture for extended periods.

Does green mould cause health problems?

Yes, green mould can be hazardous, especially if it persists and grows extensively. Most mould fungi, including Penicillium and Aspergillus, produce mycotoxins, which are toxins that can cause severe health problems. Prolonged exposure to these toxins may lead to:

Respiratory issues and asthma
Allergic reactions such as itching, sneezing, and watery eyes
Headaches and fatigue
Pneumonia in severe cases

Therefore, it’s crucial to address green mould promptly and resolve the underlying moisture problem.

Consider using a dehumidifier to keep humidity levels under control

How to remove green mould in your home

To remove green mould and prevent its return, follow these steps:

Identify the moisture source: Green mould commonly develops where there is excess moisture. Start by locating and fixing any leaks or poor ventilation in the area.
Use mould cleaning agents: There are effective products for removing green mould, both natural and chemical. Vinegar and baking soda are good for treating surface mould, while stronger mould remediation products may be necessary for deeply rooted mould.
Ventilate and dry: To prevent mould returning, ensure the room is well ventilated and dry. Consider using a dehumidifier to keep moisture levels in check.
Replace damaged materials: If mould has penetrated materials like wood or drywall, it may be necessary to replace the affected areas because mould can grow deep inside.

Also use a mould test to check the mould if you’re unsure.

How to prevent green mould in your home

To help prevent green mould, consider these key actions:

Ensure good ventilation: Install and use ventilation systems or bathroom fans to remove moist air. Regularly open windows to let in fresh air.
Use a dehumidifier: Keep humidity levels low and prevent mould growth by using a dehumidifier in damp areas like basements or bathrooms.
Keep surfaces dry: Wipe down damp surfaces, especially after showers or baths, to reduce mould risk.
Inspect and repair leaks: Fix any leaks in roofs, walls, and plumbing to eliminate moisture sources that allow mould to thrive.

To monitor humidity, use a hygrometer to measure levels and keep them below 60%.

If green mould has spread to larger areas, or if you cannot get rid of the mould on your own, it may be time to contact a professional mould remediation specialist

When to contact a professional for green mould help

If green mould has spread over large areas or you cannot control it on your own, it might be time to contact a professional mould expert. Experts can identify the source of moisture, safely remediate the mould, and advise on long-term solutions to keep your home mould-free.

Summary: prevent and remove green mould effectively

Green mould is a type of mould fungus that thrives in moist environments and can cause health issues.
To remove green mould, use natural cleaners like vinegar or baking soda, as well as professional mould remediation products.
Prevent mould by ensuring good ventilation, keeping surfaces dry, and using a dehumidifier.
If mould spreads or returns, consider contacting professional remediation services.

To measure moisture levels and prevent mould, use our moisture meters available in our webshop.