How to fix AC leak and black mold in JLT apartment?« Back to Previous Page

First, stop the moisture source immediately. The AC leak is feeding the mold growth. In Dubai's high humidity, standing water from an AC unit can lead to mold colonization in as little as 48-72 hours. The black speckles are a significant indicator of active growth, and the damp feeling confirms a persistent moisture problem.

To fix the leak, you must address its cause. In JLT apartments, the most common culprits are a clogged condensate drain line or a damaged drain pan. Turn off the AC unit at the circuit breaker. You can attempt to clear the drain line yourself by pouring a mixture of warm water and vinegar through the access point, usually located at the indoor air handler. However, for a persistent leak or if you are uncomfortable, you must call a certified HVAC technician. Dubai Municipality regulations require that any work on fixed AC systems be performed by licensed professionals to ensure proper handling of refrigerants and drainage.

For the mold on the skirting board, do not attempt to clean it with bleach. Bleach does not kill mold on porous surfaces like wood and can actually feed it. For a small, surface-level area (less than one square meter), you can carefully clean it with a mixture of detergent and water, scrubbing gently. However, given the leak has been ongoing for weeks and the room feels persistently damp, the moisture has likely penetrated the skirting board and possibly the wall and carpet backing. Surface cleaning will not address this hidden colonization.

The most effective and safe approach is professional mold remediation. The process involves containing the area to prevent spores from spreading, removing and disposing of contaminated porous materials like the skirting board and carpet section, HEPA vacuuming, and antimicrobial treatment. Crucially, they will use moisture meters to confirm the wall and subfloor are completely dry before repairs are made. For verification, a post-remediation test from an independent microbiology lab can confirm the spore count has returned to normal indoor levels. This is the only way to stop it for good and prevent it from spreading into your wall cavities.