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

That black spotting is almost certainly mold growth caused by the persistent moisture from your AC leak. This is a common issue in Dubai, where high ambient humidity combines with cool surfaces from air conditioning to create ideal conditions for condensation and mold.

For cleanup, start by addressing the source. The AC leak must be repaired by a certified HVAC technician to prevent the problem from recurring. For the existing mold on hard surfaces like the wall, a solution of diluted white vinegar or a dedicated mold-cleaning product can be effective for small areas. Wear an N95 mask and gloves during cleaning to avoid inhaling spores. For porous materials like the affected shoes, cleaning may not be sufficient, and disposal is often the safest option to prevent spores from spreading.

Prevention is key. After the leak is fixed, ensure the closet is well-ventilated; consider leaving the door ajar or installing a small vent grille to allow air circulation. Using a moisture-absorbing product like silica gel desiccant packs inside the closet can help control the micro-humidity that gets trapped in enclosed spaces. Running a dehumidifier in the apartment, especially during the more humid summer months, will significantly reduce the overall moisture load that can condense on cool surfaces.

Given the leak has been ongoing and visible growth is present, a professional inspection is strongly recommended. They can assess the full extent of the moisture damage behind the wall and confirm the mold has been properly addressed, as spores can easily become airborne during DIY cleaning. For health safety and to ensure the problem is resolved, this assessment is a prudent step.