AC mold from leak: DIY bleach or professional in Dubai?« Back to Previous Page

That black fuzz is almost certainly active mold growth, fueled by the constant moisture from your AC leak and our high Dubai humidity. While a small patch might be manageable, the combination of a water source and visible spreading means this requires more than a surface wipe.

For a small area (under one square foot), you can attempt a DIY approach. Use a detergent solution, not bleach. Bleach only lightens the color and doesn't kill the root structure on porous surfaces like drywall; it can also irritate your lungs. Scrub with microfibre cloths, dry the area completely with a fan, and fix the AC leak immediately to prevent recurrence. However, if the staining is extensive, has penetrated the wall, or returns after cleaning, professional assessment is needed. Mold behind walls is common here and often requires controlled removal to prevent spreading spores.

Given the leak has been ongoing and the mold is spreading, the moisture has likely compromised the wall interior. A professional inspection can determine the extent using moisture meters and, if necessary, air or surface sampling to identify the species. In Dubai, remediation companies should follow standards like the IICRC S520 for mold removal, which includes containment and air scrubbing to protect your home. The priority is stopping the water source, then addressing the resulting damage properly.