Should we remove this black mold ourselves or call a pro?« Back to Previous Page

That combination of visible mould on an exterior wall and new respiratory symptoms is a strong signal the two are connected. Dubai's high humidity, especially at night, causes condensation on cooler exterior walls, creating the perfect environment for mould inside closets and behind furniture.

For a patch smaller than one square meter (about 3ft by 3ft), you can attempt careful self-remediation. First, isolate the area by closing the closet door and sealing the gap with tape. Wear an N95 mask, goggles, and gloves. Scrub the area with a dedicated mould remover or a solution of detergent and water—never use bleach, as it can exacerbate the problem by releasing spores and not addressing the root cause. Dry the area completely with a fan afterwards. The critical step is identifying and correcting the moisture source, which is likely condensation from the temperature differential between the air-conditioned room and the outside wall. Improving air circulation in the closet and ensuring your AC is not set excessively cold at night can help.

However, given the symptoms have persisted for a month and are worsening, a professional inspection is strongly advised. The visible patch may only be a fraction of the growth, which could be inside the wall cavity. A certified inspector can use moisture meters and thermal cameras to assess the wall's integrity and take air or surface samples for lab analysis to identify the mould species. This is crucial for understanding the health risk and ensuring the remediation plan is complete. In Dubai, look for providers who are certified by recognised international bodies like the IICRC and can provide a verifiable lab report from an independent microbiology lab—this is your assurance they are diagnosing the problem, not just wiping a surface.