How to prevent mold in closet on humid exterior wall?« Back to Previous Page

Your issue is a classic Dubai problem—an exterior wall in a humid climate acts as a cold surface, causing condensation and creating a perfect environment for mold. Vinegar only addresses surface growth, not the underlying moisture.

Start by verifying the moisture source. Is there a hidden plumbing leak from an adjacent bathroom? More likely, it's condensation due to the temperature difference between your air-conditioned room and the hot, humid outside wall. To manage this, increase air circulation. Leave the closet doors open as much as possible and consider installing a small battery-operated dehumidifier or a moisture absorber like silica gel inside. For severe, recurring cases, a professional inspection can identify the exact humidity level and pinpoint the condensation point.

The most effective long-term solution is to improve the thermal break of that exterior wall. This can involve adding insulation or installing moisture-resistant barrier paint or panels on the closet's interior walls. This creates a shield that prevents the cold surface from forming and attracting moisture. Since the mold is already established, a proper remediation to remove the spores from all surfaces, including the walls and contents, is necessary before these preventative measures are implemented to ensure it doesn't return.