Black spots in bedroom corner: mold and need professional?« Back to Previous Page

Those black spots are almost certainly mold, a common issue in Dubai due to high humidity and constant AC use creating condensation. Wiping with bleach is a temporary fix that often fails because it doesn't address the moisture source or penetrate porous surfaces like drywall.

The location—above a window in a corner—suggests a thermal bridge, where warm, humid outdoor air meets the cooler interior wall, causing condensation inside the wall cavity. This often indicates a hidden moisture problem that simple cleaning won't resolve.

For a small patch (under one square foot), you can carefully clean it with a vinegar solution or a dedicated mold remover, wearing a mask. However, if it returns quickly or you've had persistent humidity, a professional inspection is advised. They use moisture meters and thermal cameras to find the hidden condensation source, which is crucial for a permanent solution. In many Dubai villas, this is related to insufficient insulation or AC duct leakage.