How to treat and prevent mold in a dark bedroom?« Back to Previous Page

My master bedroom closet in Jumeirah Park has been smelling damp for the past few weeks, and I just found a bunch of black spots on the back wall and on a couple of my leather bags. We run the AC constantly, but the room is on the side of the house that never gets any sun. What’s the most effective way to treat the mold I already have and prevent it from coming back for good?
Posted by Mansoor Khan
Asked on March 29, 2026 10:18 am
The issue you're describing in your Jumeirah Park bedroom is a classic scenario in Dubai, driven by our unique climate. The constant AC use creates significant temperature differentials between the cool room and the warmer wall cavities, leading to condensation—a primary source of moisture for mold growth, especially in dark, sun-deprived areas with no natural drying.

The black spots on the wall and your leather goods indicate an active colony. Do not attempt to clean this with bleach or household disinfectants. These are ineffective on porous surfaces and can exacerbate the problem by adding moisture. For porous materials like drywall and leather, specialized biocides and remediation techniques are required to truly eradicate the hyphae (root structure) embedded within.

The most effective treatment protocol involves a multi-step process. First, a professional inspection using moisture meters and thermal imaging is critical to identify the exact moisture source and the full extent of the contamination, often hidden behind walls. Remediation includes: 1) Containment of the area to prevent spore spread. 2) HEPA filtration to scrub the air. 3) Application of EPA-approved, specialized biocides to kill the active growth. 4) Removal and disposal of unsalvageable porous materials (e.g., affected drywall, insulation). 5) Thorough drying using industrial dehumidifiers and air movers. 6) Hygienization of surfaces to leave a protective residual.

For permanent prevention, address the humidity. Ensure your AC unit is correctly sized and serviced to manage latent heat (humidity removal), not just sensible heat (temperature). Consider supplementing with a standalone, capacity-rated dehumidifier in the closet. Improve air circulation by not overpacking the closet and leaving space between the wall and your items. Regularly inspect for condensation.

Given the value of your property and belongings, I strongly recommend a professional assessment. Our certified team at Saniservice uses advanced diagnostic tools and UAE-approved remediation methods to resolve such issues permanently. For a detailed inspection and quote, please call us at 800-MOLDS or email hello@saniservice.com.
Posted by Sani Admin
Answered on March 30, 2026 8:00 pm