Black mold causing cough? How to treat and check AC?« Back to Previous Page

Black spots with a damp wall behind furniture are a classic sign of condensation-related mould, very common in Dubai's humid climate where AC units run constantly. The coughing in your children is a legitimate concern, as mould exposure frequently causes respiratory irritation, especially in kids.

For immediate action, first address the moisture source. Move the wardrobe away from the wall to allow air circulation. Wipe the mould off with a microfiber cloth dampened with a diluted white vinegar or mild detergent solution; avoid bleach as it doesn't kill the roots and can worsen fumes in an enclosed space. Dry the area thoroughly with a fan. However, this is only a surface fix. The dampness indicates a persistent issue, likely from the wall being colder than the room's dew point (thermal bridging) or a hidden leak.

Your AC units should absolutely be inspected. In high-rises, a clogged condensate drain line is a primary culprit, causing excess humidity and hidden moisture inside the unit and walls. A professional inspection can identify if the drain pan is overflowing or if the insulation around the cold water pipes within the wall is failing, which is a common construction issue here.

Given the symptoms and the dampness you can feel, a professional assessment is strongly recommended. DIY cleaning often misses the root cause, and hidden mould within the wall cavity or AC system can continue to affect air quality. A proper inspection includes moisture meters and, if necessary, air or surface sampling to identify the mould type and concentration, which guides the correct remediation method.