How to treat closet mold and prevent moisture in apartment?« Back to Previous Page

My bedroom closet in our Marina apartment has started getting a faint damp smell, especially on the outer wall. I pulled everything out and found a few small black spots in the corner. It’s been so humid the last few weeks that I think it’s finally taking its toll. What’s the most effective way to treat this small area myself and what can I do to stop the moisture from building up in there again?
Posted by Jessica White
Asked on March 24, 2026 8:47 pm
The faint damp smell and visible black spots in your Marina apartment closet are classic indicators of mold colonization, almost certainly exacerbated by the recent high humidity levels. Given Dubai's coastal climate, where relative humidity can exceed 90% and air conditioning systems create significant temperature differentials, condensation on cooler external walls is a primary cause.

For a small, localized area, immediate action is required. First, wear an N95 mask and gloves. Wipe the affected surface with a solution of detergent and warm water, then follow with a disinfectant like 70% isopropyl alcohol or a diluted bleach solution (1 part bleach to 10 parts water), ensuring adequate ventilation. Do not attempt to "sand" the mold away, as this will aerosolize spores. Thoroughly dry the area with a fan. However, this addresses only the surface manifestation, not the underlying moisture issue.

The core problem is moisture accumulation. The outer wall is likely a "cold bridge," where condensation forms. To prevent recurrence, you must improve air circulation and reduce humidity within the closet. Leave the closet doors ajar periodically. Consider installing a small, battery-operated dehumidifier or moisture absorber (like those containing calcium chloride) inside. Ensure your apartment's AC is serviced and functioning correctly, as it is your primary dehumidification tool. Check that the drain line is not clogged and that the unit is set to a consistently cool temperature to minimize condensation cycles.

It is crucial to understand that what you see might only be a fraction of the problem. Mold can proliferate behind baseboards and within wall cavities. For a definitive diagnosis of the species and the extent of the contamination, a professional inspection is strongly advised. Our certified inspectors use thermal imaging to identify hidden moisture and air sampling to assess spore counts. If the area is larger than one square foot, or if you suspect hidden growth, professional remediation is the only guaranteed solution to protect your health and property. For a comprehensive assessment, please call Saniservice at 800-MOLDS or email hello@saniservice.com.
Posted by Sani Admin
Answered on March 26, 2026 2:02 pm