How to treat and prevent closet mold on outside wall?« Back to Previous Page

Our master bedroom closet on the outside wall has started getting black mold spots on the leather bags and shoes we store in there. We keep the AC running constantly, but the musty smell is really strong when we open the closet doors. We had the same issue last winter after the foggy season. What’s the most effective way to treat this and what can we do to stop the moisture from coming back every year?
Posted by Patricia Jones
Asked on April 6, 2026 11:06 pm
The recurring mold in your bedroom closet on the exterior wall is a classic symptom of thermal bridging and condensation, a very common issue in Dubai due to the extreme humidity and year-round AC operation. The cold air from your AC-chilled room is contacting the warmer, humid air penetrating the external wall, causing condensation inside the closet. This trapped moisture, especially during foggy seasons, creates the perfect environment for mold growth on organic materials like leather.

Effective treatment must address both the active growth and the root cause. For the items, leather goods require professional cleaning with EPA-approved biocides to prevent permanent damage. For the structure, a simple wipe-down with bleach is insufficient and can be hazardous. The area must be treated with antimicrobial solutions and the porous surfaces may need specialized sealing.

To prevent recurrence, the moisture source must be eliminated. This requires a professional inspection to identify the exact point of intrusion and the thermal bridge. Solutions often include improving the closet's ventilation, installing a passive air vent to allow circulation, and applying internal wall coatings or insulation to correct the surface temperature and prevent condensation. A dehumidifier placed near the area can provide a temporary fix but is not a permanent solution.

Given the pattern and location, this is a case for professional assessment. We at Saniservice specialize in diagnosing and resolving such moisture issues in accordance with Dubai Municipality's health and safety standards. Our process includes thermal imaging to pinpoint the problem and a guaranteed remediation plan. For a definitive solution to stop this annual problem, call us at 800-MOLDS (800-66537) or email hello@saniservice.com for an inspection.
Posted by Sani Admin
Answered on April 9, 2026 9:07 pm