Mold on wall from AC leak: DIY or call professional?« Back to Previous Page

That damp smell and recurring spots after vinegar cleaning indicate active mold growth, not just surface staining. The root cause is the AC leak, creating a constant moisture source in Dubai's high humidity.

For a small, isolated patch (under one square foot), you could attempt a more thorough DIY approach. Turn off the AC to the room, wear an N95 mask and gloves, and scrub the area with a solution of detergent and water. Then, use a disinfectant registered for mold remediation. However, this only addresses the visible growth. The mold’s root system (hyphae) is likely deep within the plaster or drywall, and the leak must be fixed permanently to prevent immediate return.

Given the description—spreading spots, a persistent musty odor, and an identified water source from the AC unit—this strongly suggests a larger infestation behind the wall. In such cases, professional assessment is highly recommended for two key reasons. First, they will identify and stop the moisture intrusion at its source, which is the leaking AC unit or clogged drain line. Second, they have the tools and methods, like boroscope inspections and controlled remediation techniques, to assess the full extent of the damage and remove contaminated materials safely without spreading spores throughout your home. A proper remediation will also include drying the area to a specific moisture content to ensure regrowth is impossible. For verifiable results, look for a company that provides before-and-after documentation from an independent microbiology lab.