Black mold in closet: landlord or professional first?« Back to Previous Page

Black mold in a closet on an exterior wall is a classic sign of condensation due to the temperature difference between the air-conditioned room and the hot, humid outside air. Your first step should be to notify your landlord in writing immediately. Under Dubai rental law, structural issues like moisture penetration and mold resulting from building envelope problems are typically the landlord's responsibility to address.

For a small patch (under one square foot), you can clean it yourself with a solution of detergent and water, wearing an N95 mask and gloves. However, since it's on an exterior wall, the root cause is likely a thermal bridge or inadequate insulation, meaning it will almost certainly return without professional remediation of the hidden moisture source.

Given the UAE's high humidity, simply cleaning the surface is a temporary fix. A professional inspection is recommended to identify the exact cause—whether it's condensation, a hidden pipe leak, or external water seepage. They use moisture meters and thermal cameras to find the full extent of the problem behind the wall.

The permanent solution involves fixing the insulation or sealing on the exterior wall to prevent condensation, then properly remediating the mold. After remediation, a post-testing air or swab sample sent to an independent microbiology lab is the only way to verify it was resolved effectively. For your health and to ensure the landlord completes a permanent fix, starting with a professional assessment provides the evidence needed for your request.