AC leak causing black mold: DIY or professional for my villa?« Back to Previous Page

That black spotting is a visible mold colony, likely fueled by the ongoing moisture from your AC leak. Given its location on a wall and the duration, this requires professional remediation, not a DIY bleach solution.

Bleach is surface-level and ineffective on porous materials like drywall and concrete block, which are common in UAE villas. It can't address the mold growing inside the wall cavity, a near certainty after months of leakage. The high humidity and condensation in Dubai's climate create perfect conditions for this hidden growth. Proper remediation involves isolating the area, removing contaminated porous materials, HEPA vacuuming, and antimicrobial treatment to address the root cause.

For a situation of this scale, you should contact a professional mold remediation company. They will conduct an inspection, often with a moisture meter and borescope, to determine the full extent of the damage behind the wall. The cost for a single room is influenced by the square footage of affected wall, ceiling, and flooring that requires removal and replacement, not just surface cleaning. You can expect to request an assessment and quote based on the severity they find.

Crucially, the AC leak itself must be repaired by a certified HVAC technician to prevent immediate recurrence. After remediation, consider a post-clearance test to verify the spore count in the room has returned to a normal background level, ensuring the job was done correctly.