How to treat and prevent black mold on interior wall?« Back to Previous Page

The black, fuzzy patch is likely Stachybotrys or Cladosporium, both common in Dubai due to high humidity and condensation from AC systems. Since it's on a cold, damp interior wall, the moisture is probably from condensation, not a leak. This is a frequent issue when cold interior walls meet warm, humid air, creating a perfect environment for mold.

For a small patch (under one square foot), you can treat it yourself. Wear an N95 mask, gloves, and eye protection. Scrub the area with a solution of white vinegar or a dedicated mold-cleaning product. Avoid bleach, as it only removes the surface color and does not kill the roots. After cleaning, allow the wall to dry completely. A dehumidifier can help significantly in the bedroom.

To prevent it from returning, you must address the condensation. Increase air circulation around the wardrobe; even a small gap between the furniture and the wall can help. Wiping down cold walls regularly to remove condensation can also be effective. For a more permanent solution, consider improving the room's insulation or having an HVAC specialist assess if your AC is properly dehumidifying the space.

However, since you've noted allergy symptoms and dampness within the wall structure, this suggests a more persistent issue. In such cases, a professional inspection is recommended to rule out hidden mold growth inside the wall cavity, which is common here. They can use moisture meters and thermal cameras to identify the exact condensation source. A lab test can also identify the mold species, which is crucial for understanding potential health risks and ensuring the correct remediation method is used.