How to clean mold from wall and fix AC leak?« Back to Previous Page

The black spots you're seeing are very likely active mold growth, a common issue in Dubai's climate due to the high humidity and constant AC operation. The AC condensate drain line is likely clogged or the drain pan is cracked, causing water to leak and create the perfect damp environment for mold, primarily Cladosporium or Aspergillus, to thrive on the organic compounds in the paint and drywall.

Do not simply wipe the mold away with bleach or a household cleaner. This will only temporarily remove the visible discoloration (the spores) but not the root structure (the hyphae) embedded in the porous wall material. Disturbing it improperly will aerosolize spores, worsening your indoor air quality and potentially causing respiratory issues.

For a small, contained area, you can carefully clean the surface with a solution of detergent and warm water, ensuring you wear an N95 mask and gloves. However, given the presence of a persistent water source from the AC and a noticeable musty odor—which indicates a larger potential colonization within the wall cavity—this situation requires a professional approach.

You need two separate specialists:
1. A certified HVAC technician to diagnose and permanently fix the AC leak. They will clear the condensate drain line, check the pump, and seal the drain pan.
2. A certified mold inspection and remediation company, like Saniservice, to properly assess the extent of the mold growth. We use moisture meters and thermal imaging cameras to find hidden dampness, perform air quality testing to identify spore types and concentrations, and then execute a controlled remediation process following industry standards (IICRC S520) to ensure complete removal and prevent recurrence.

For a permanent solution to both the symptom and the cause, I strongly recommend a professional inspection. Call our experts at 800-MOLDS (800-66537) or email hello@saniservice.com for a comprehensive assessment.