Black Mould in the Bathroom: Causes, Risks, and How to Remove It

What is Black Mould? Black mould (Stachybotrys chartarum) is a common fungal growth found in damp, humid environments such as bathrooms. It thrives in areas with poor ventilation and persistent moisture, often appearing on walls, ceilings, grout, and silicone sealants. While some mould types are relatively harmless, black mould can contribute to respiratory issues, allergies, and other health concerns if left untreated.

What Causes Black Mould in Bathrooms? Bathrooms are particularly prone to black mould due to high humidity, condensation, and inadequate ventilation. The most common causes include:

·       Poor airflow and lack of ventilation

·       Persistent leaks or dampness

·       Insufficient cleaning and maintenance

·       Absorptive surfaces like grout and silicone trapping moisture

Health Risks of Black Mould Exposure to black mould can cause various health issues, particularly for individuals with respiratory conditions, allergies, or weakened immune systems. Symptoms may include:

·       Coughing and wheezing

·       Skin irritation

·       Sinus congestion

·       Eye irritation

How to Remove Black Mould from Bathroom Surfaces

1. Removing Black Mould from Tiles and Grout

·       Mix equal parts white vinegar and water or use a diluted bleach solution (1 part bleach to 10 parts water).

·       Apply the solution using a spray bottle or sponge.

·       Let it sit for 10–15 minutes before scrubbing with a stiff-bristled brush.

·       Rinse thoroughly and dry the area.

2. Removing Black Mould from Silicone Sealant Black mould often penetrates silicone, making removal more challenging. To clean it effectively:

·       Mix baking soda with white vinegar to create a thick paste.

·       Apply the paste to the affected silicone and let it sit for several hours.

·       Scrub with an old toothbrush and rinse.

·       If mould persists, replacing the silicone may be necessary.

3. Preventing Black Mould Growth in Bathrooms

·       Improve ventilation by using exhaust fans or opening windows.

·       Wipe down wet surfaces after showering.

·       Use anti-mould cleaning products regularly.

·       Fix leaks and water damage promptly.

·       Consider mould-resistant paint and sealants.

When to Call a Professional 

If black mould is widespread or keeps returning despite regular cleaning, professional remediation may be required. Confluence Environmental provides expert mould assessment and removal solutions to ensure a safe and healthy indoor environment.

Get in Touch 

Concerned about black mould in your bathroom? Contact Confluence Environmental today for expert mould management solutions.