How to safely clean black mold from bedroom wall?« Back to Previous Page

My kids have been coughing a lot at night and I just noticed a patch of black mold on the wall behind their bedroom wardrobe. We had a small leak from the AC unit a couple of weeks ago and I thought I'd dried it completely. What's the best and safest way to clean this myself to prevent it from coming back and making them sick?
Posted by Krzysztof Richard
Asked on April 22, 2026 4:40 pm
First, address the moisture source. In Dubai's climate, AC condensation leaks are a primary cause of mold. The leak you had is the root problem; ensure the AC drain line is completely unclogged and the unit is serviced to prevent a recurrence.

For cleaning a small patch (under one square meter), wear an N95 mask, gloves, and safety glasses to avoid inhaling spores or skin contact. Isolate the area by closing the bedroom door and consider covering the air vent with plastic sheeting to prevent spores from spreading through the AC system.

Do not dry scrub or vacuum, as this will aerosolize the spores. Mix a solution of one part white vinegar to four parts water or a diluted detergent. Apply it to the moldy area with a cloth, scrubbing gently. After cleaning, thoroughly dry the wall using a fan directed at the area; this final drying step is critical in our high humidity to prevent immediate regrowth.

Dispose of all cleaning cloths in a sealed bag. If the mold has penetrated porous materials like drywall or the backing of the wardrobe, complete removal is often impossible and the material must be replaced.

Given that the mold is already suspected of affecting your children's health with nighttime coughing, and considering the prior leak, a professional inspection is strongly advised. They can use moisture meters to confirm the wall is dry deep within and conduct air quality tests to ensure no hidden colonies exist in the AC system or wall cavity, which is a common issue here. This verifies the space is truly safe for your family.
Posted by Sani Admin
Answered on April 24, 2026 4:12 pm