Black mold from AC leak: DIY or call maintenance?« Back to Previous Page

The first step is to call your building maintenance immediately to stop the AC leak at its source. Until the moisture problem is fixed, any cleaning is temporary. For your safety, wear an N95 mask, gloves, and eye protection when assessing the area.

For a small patch (under 1 square foot/0.1 sq m), you can clean it with a solution of detergent and water, then dry it thoroughly. However, black mould growing on drywall due to a prolonged leak is a serious concern. The visible patch is often just the surface; the moisture likely penetrated deep into the wall, and the structure itself may be compromised. In Dubai's high humidity, hidden mould can regrow quickly.

Given the description of a "huge patch" from a long-term leak, this is not typically a DIY job. Building maintenance will fix the leak but rarely handle mould remediation to the standard required to prevent recurrence and ensure indoor air quality. They may simply paint over it, which traps the problem.

A professional inspection is strongly advised to assess the full extent behind the wall. Reputable remediation companies use moisture meters and thermal imaging to find hidden dampness. They will contain the area, safely remove contaminated porous materials like drywall, and use HEPA filtration to clean the air. For verification, post-remediation testing by an independent lab is the only way to confirm the space is truly mould-free. This comprehensive approach is crucial in our climate to prevent health issues and protect your property.