Black mold in closet from AC moisture: who to call?« Back to Previous Page

You're describing a classic case of indoor moisture leading to mold growth, a common issue in Dubai's climate. The dampness on an interior wall combined with the AC unit's operation strongly suggests condensation or a leak is providing the constant moisture mold needs.

For the immediate situation, carefully remove the moldy clothing in sealed bags for professional cleaning or disposal to prevent spore dispersal. Do not attempt to clean the wall yourself with bleach, as this can release a high concentration of spores and only removes surface discoloration, not the root problem.

You need two professionals. First, call a licensed HVAC technician to inspect the AC system. The issue is often a blocked condensate drain line, insufficient insulation on cold air ducts running through the warm closet space, or an incorrectly balanced system creating negative pressure that draws humid air into the wall cavity. They can diagnose and rectify the moisture source.

Second, for the mold itself, you should engage a certified mold assessment company. They will conduct a proper inspection, often using moisture meters and thermal imaging to find the extent of the growth within the wall cavity, which is almost certainly larger than what's visible. A reputable company will provide a detailed protocol for remediation, which should be handled by a separate specialized team to avoid conflicts of interest. Look for providers who base their work on IICRC S520 standards and can provide verifiable before-and-after testing data from an independent lab to confirm the space has been returned to a normal fungal ecology. Your son's stuffy nose is a strong indicator that professional assessment is the necessary course of action.