AC leak causing black mold: DIY clean or hire pro?« Back to Previous Page

A persistent AC leak causing black mold requires a professional assessment, not a DIY bleach clean. Bleach only removes surface discoloration on porous materials like drywall or plaster; it does not address the root moisture problem or eliminate the fungal roots (hyphae) growing within the wall. The high humidity in Dubai provides a constant source of moisture, allowing the mold to regrow quickly and potentially spread unseen inside the cavity.

The black patch you see is likely just the visible portion of a larger colony. A professional inspection is needed to determine the extent of the contamination inside the wall and to identify and permanently fix the AC leak—this is the critical first step. For a proper remediation, the affected section of drywall must be removed under containment to prevent spore dispersal, the underlying structure treated with specialized antimicrobials, and then rebuilt. The cost to fix this properly is not trivial, as it involves leak repair, mold removal, and reconstruction. It is essential to hire a company that provides verifiable before-and-after testing from an accredited lab to confirm the space has been returned to a healthy condition.