how to permanently prevent closet mold on exterior wall?« Back to Previous Page

The recurring mold indicates a persistent moisture source that cleaning alone won't fix. In Dubai's climate, exterior walls can be significantly colder than the indoor air, causing condensation inside the wall or on its surface—this is the hidden moisture feeding the mold.

First, address the humidity at the source. Your AC cools the air but may not be effectively dehumidifying that enclosed space. A small, standalone desiccant dehumidifier placed inside the closet can make an immediate, measurable difference by keeping relative humidity below 60%.

The core issue is likely thermal bridging. An infrared thermal imaging inspection can identify this cold spot on the wall. The most effective long-term solution is to improve the insulation on that specific exterior wall to bring its surface temperature closer to the room's, which prevents condensation from forming.

Until that can be addressed, ensure constant air circulation. Leave the closet door ajar and consider installing a small, low-energy exhaust fan to move stagnant, humid air out. For valuable items like leather goods, store them in sealed containers with desiccant packs during the most humid months.

Given it's a recurring issue on an exterior wall, a professional inspection is recommended. They can use moisture meters and thermal cameras to pinpoint the exact cause and recommend structural solutions, as per Dubai Municipality's building standards for dampness prevention.