Mould growth on rendered walls can be a common problem, especially in areas with high humidity or moisture. Not only is mould unsightly, but it can also pose health risks. It is essential to remove mould from rendered walls promptly and effectively to prevent its spread and minimize potential health hazards. Here is a step-by-step guide on how to remove mould from silicone or mineral render:

Safety Precautions

Before you begin the mould removal process, it is important to take proper safety precautions. Wear protective gloves, safety goggles, and a face mask to avoid direct contact with mould spores. It is also advisable to open windows or use fans to improve ventilation during the process.

Assess the Extent of the Mould

Examine the rendered walls to determine the extent of the mould growth. If the mould covers a small area, you may be able to tackle it yourself. However, if the mould covers a large area or if you have health concerns, it is best to consult a professional mould removal service.

Prepare the Area

Clear the surrounding area and cover any nearby furniture or flooring to protect them from cleaning solutions or falling debris. Lay down plastic sheets or old towels to catch any drips or debris during the cleaning process.

Dry Brushing

Using a stiff-bristled brush or a dry cloth, carefully remove loose mould spores and surface mould from the rendered walls. Be gentle to avoid damaging an acrylic or silicone render. Ensure that you clean the brush or dispose of the cloth properly afterward to prevent the spread of mould spores.

Create a Cleaning Solution

Prepare a cleaning solution by mixing a cup of bleach with one gallon of water. Alternatively, you can use a commercial mould remover or a mixture of vinegar and water. These solutions are effective in killing mould and preventing its regrowth. Ensure proper ventilation while working with bleach.

Test the Cleaning Solution

Before applying the cleaning solution to the entire wall, it is advisable to test it on a small inconspicuous area. This will help ensure that the cleaning solution does not cause any damage or discoloration to external render.

Apply the Cleaning Solution

Dip a clean sponge or soft-bristled brush into the cleaning solution and gently scrub the mould-affected areas of the silicone or mineral render. Work in a circular motion, applying moderate pressure to remove the mould. Be thorough and ensure that you cover all the affected areas.

Scrub the Walls

Using a clean sponge or soft-bristled brush, scrub the walls again, this time more vigorously. Apply moderate pressure to remove the mould. Rinse the sponge or brush frequently and change the cleaning solution if it becomes dirty.

Rinse the Walls

After scrubbing, rinse the walls thoroughly with clean water. This will help remove any remaining cleaning solution and residual mould. Use a clean sponge or cloth to wipe away any excess moisture.

Drying and Ventilation

Allow the walls to dry completely. Use fans or open windows to promote air circulation and aid in the drying process. Ensure that the walls are completely dry before repainting or applying any further treatments. Proper drying is crucial to prevent future mould growth.

Prevention Measures

To prevent mould from recurring on your external render, address any underlying moisture issues. Check for leaks, improve ventilation, and maintain proper humidity levels. Regularly clean and inspect the walls to detect and address any signs of mould growth early on.

Seek Professional Help if Needed

If the mould growth persists or if you are dealing with a large-scale mould problem, it is advisable to seek professional help. Professional mould remediation services have the expertise and equipment to effectively remove mould and address any underlying issues.

In conclusion, removing mould from mineral or silicone render requires a systematic approach and proper safety precautions. By following these steps, you can effectively remove mould and prevent its recurrence or the need for rendering building. However, it is important to address any underlying moisture issues to ensure long-term prevention of mould growth. If you are unsure about tackling mould removal yourself, it is always best to consult a professional for advice and assistance.