How to permanently stop mold in Dubai villa closets?« Back to Previous Page

We've lived in our villa in Al Barsha for about five years, and every winter after the cooler, more humid weather sets in, we get these dark black spots forming in the corners of our master bedroom closet and along the ceiling. We wipe it away with bleach but it always comes back within a few weeks. What is the most effective long-term solution to stop this mold from recurring for good?
Posted by Thanh Matsumoto
Asked on April 21, 2026 1:40 am
The recurring mold in your closet is a classic Dubai humidity issue. That black spot is almost certainly condensation-related mold, which thrives when warm, humid air meets cold surfaces like your exterior walls or AC-cooled ceilings. Bleach only removes surface discoloration but doesn't address the moisture source or underlying hyphae.

First, identify the condensation source. An exterior wall in Al Barsha, especially if shaded, can become significantly colder than the indoor air during winter, creating a perfect breeding ground. Check for any plumbing leaks in adjacent walls, but condensation is the most likely culprit here.

The permanent solution requires reducing humidity and improving insulation. Use a hygrometer to measure closet humidity; aim to keep it below 60%. Ensure the room's AC is functioning correctly and running consistently, as it is your primary dehumidifier. Leave closet doors open to promote air circulation. A standalone dehumidifier in the bedroom during the more humid winter months can make a significant difference.

For the walls themselves, cleaning with a dedicated mold remover (not just bleach) is more effective. Afterwards, consider applying a mold-resistant primer and paint, which can help suppress regrowth.

For a definitive, long-term fix, a professional inspection is recommended. They can use thermal imaging to pinpoint the exact cold spots causing condensation and assess whether improving wall insulation is necessary. This is a common requirement in many villas here. A proper assessment will also confirm the mold type and provide a targeted remediation plan to prevent its return.
Posted by Sani Admin
Answered on April 22, 2026 4:03 pm