How to remove black mold from bedroom wall in humid climate?« Back to Previous Page

The black spots are likely mould growth, a common issue in Dubai's humid climate, especially on exterior walls where condensation can form. For a small area (under one square meter), you can tackle it yourself. Start by mixing a solution of one part white vinegar to four parts water or a diluted bleach solution (1:10 with water) in a spray bottle. Wear an N95 mask, gloves, and eye protection. Spray the area, let it sit for 15 minutes, then scrub with a stiff brush. Wipe clean with a damp cloth and dry the area thoroughly immediately after.

Crucially, you must address the moisture source. In a villa, this is often condensation from the temperature difference between the air-conditioned room and the hot exterior wall. Ensure your AC is set to a consistent temperature (around 22-24°C) to minimize this effect. Improve air circulation in the closet by not overpacking it and occasionally leaving the doors open. A dehumidifier can also help significantly.

Given the mould is on an exterior wall and appeared quickly, there is a possibility of a more significant moisture issue within the wall cavity, such as a minor leak or insufficient insulation. If the mould returns after cleaning and moisture control, or if the affected area is large, a professional inspection is strongly recommended. They use moisture meters and borescopes to check inside walls, which is the only way to rule out a hidden problem. Companies with their own microbiology labs can also identify the mould type to better assess any potential health risks, which is particularly important for families.