How to permanently remove and prevent mold in UAE?« Back to Previous Page

That pattern of small black spots on an exterior wall, worsening after humid weather, is classic for condensation-related mould growth, a very common issue here. Your sinus irritation is a typical reaction to the spores it releases.

For a small area like a closet corner, start by scrubbing the surface with a solution of white vinegar or a dedicated mould-cleaning product. Always wear an N95 mask and gloves during cleaning to avoid inhaling spores. After cleaning, the wall must be completely dried. However, this only addresses the visible growth, not the underlying moisture source.

Permanent prevention requires controlling the humidity that causes condensation. In our climate, this is almost always due to the temperature difference between the cold AC-cooled interior and the hot, humid exterior air, especially on exterior walls. For that closet, improve air circulation by not overpacking it and occasionally leaving the door ajar. A small renewable desiccant dehumidifier placed inside can also help significantly.

For a lasting solution on an exterior wall, the root cause must be identified. This often requires a professional inspection to assess insulation deficiencies, potential AC unit issues causing excessive cooling, or other hidden factors. They can use moisture meters to find the exact condensation points. In many cases, improving the thermal break of the wall or adjusting the AC system is necessary to prevent the cycle from repeating every humid season. If the problem persists or covers more than a few square feet, a professional assessment is strongly recommended to protect your property and health.