Dealing with recurring black mold in closet, DIY or pro?« Back to Previous Page

Recurring black mold in a closet on an exterior wall is a classic issue in Dubai, often caused by thermal bridging. The cold interior wall from your AC meets the hot, humid outdoor air, creating a perfect environment for condensation and mold growth inside the cavity. Vinegar is a surface-level treatment that won't address this hidden moisture source, which is why it returns.

For a small, contained area, you can attempt a more thorough DIY approach. Use a dedicated fungicidal cleaner from a hardware store, not just a general disinfectant. After cleaning, the critical step is moisture control. A small, plug-in dehumidifier or desiccant bags inside the closet can help, but you must also identify and seal any air leaks around the closet to prevent humid air from entering.

However, if the mold returns after this or if there's any visible water staining on the wall, the problem is likely inside the wall itself. In this case, a professional assessment is strongly recommended. They use moisture meters and thermal imaging to locate the exact condensation point, which is not something a homeowner can diagnose. Treatment for a small closet is typically a focused job; expect pricing to be based on the diagnostic time and the required remediation steps rather than a large square footage, making it a more manageable project. Always verify the company holds a DHA-approved license for mold remediation.