How to fix damp smell in walk-in closet?« Back to Previous Page

That damp smell in your Al Barsha villa closet is almost certainly microbial growth, triggered by the high humidity and constant AC use. The pattern—strongest in the evening near an outside wall—points directly to two common UAE issues: a clogged AC condensate drain line or water ingress through the external wall.

First, check for a blocked condensate drain pan. The AC unit's constant operation produces condensation that should drain away. If the drain line is clogged, this water overflows, soaking into nearby walls and flooring, creating a persistent damp environment for mold and bacteria. Locate the drain line (often a white PVC pipe exiting the external wall) and check if it's dripping water. If it's dry while the AC is running, it's likely blocked.

Second, inspect the external wall corner. Dubai's afternoon rains, however infrequent, can drive moisture through tiny cracks in the render or around window frames. This moisture gets trapped inside the wall cavity and is cooled by the AC, creating a hidden damp zone perfect for microbial growth.

For an immediate step, move everything out of the closet and wipe all surfaces with a dilute white vinegar solution. This can reduce surface microbes and the odour temporarily. Then, run a dehumidifier in the space for 24-48 hours to dry it out thoroughly.

However, these are temporary measures. The smell will return unless the moisture source is eliminated. For a permanent fix, a professional inspection is necessary. They will use moisture meters to pinpoint the exact source of dampness within the wall and use borescopes to inspect the AC drain line and evaporator coil for hidden biofilm growth. In many cases, the solution involves rodding the AC drain line, treating the coil and drain pan with an anti-microbial solution, and sealing the external wall. Verifiable before-and-after testing is the only way to confirm the issue is resolved for good.