For a small patch (under one square foot), a DIY approach can be attempted. Wear an N95 mask and gloves. Scrub the area with a detergent solution, then disinfect with a diluted white vinegar or hydrogen peroxide spray. Do not use bleach, as it does not prevent regrowth. The critical step is to find and stop the moisture source. Dry the area completely with fans and a dehumidifier.

However, given the UAE’s high humidity and that the mold has returned after rain, the moisture source is probably hidden within the wall or ceiling. This is very common here with condensation buildup around AC ducts or minor roof leaks. DIY fixes often fail in these scenarios because the root cause isn’t addressed.

You should notify building management immediately. Under Dubai’s rental and strata laws, the responsibility for structural repairs, including fixing leaks from common areas or the building exterior, typically falls on the property owner or management. They are obligated to address it. Document the issue with photos and your communication with them.

If the smell persists or the mold returns quickly, a professional inspection is advised to identify the hidden extent of the damage and the exact species, as some types require more targeted remediation.