The constant AC use is a key indicator. In Dubai’s climate, AC systems are designed to manage humidity. If the wall remains damp, it suggests an underlying problem the AC cannot overcome, such as a leaking pipe within the wall, faulty insulation, or a structural defect allowing moisture ingress. The black mold (likely Stachybotrys chartarum) and associated health symptoms in your children are serious and necessitate immediate professional attention.

Your first step is to formally notify the landlord or property management company in writing, detailing the issue and the health impact. They are typically responsible for arranging and paying for the investigation and remediation of the root cause. As the tenant, you are usually responsible for informing them promptly and allowing access for repairs.

However, due to the visible mold and health symptoms, we strongly recommend an independent, professional inspection to identify the exact moisture source and mold species. This provides an objective report you can present to the landlord. Saniservice specializes in such diagnostic testing and comprehensive remediation in accordance with Dubai Municipality guidelines. For immediate advice and to schedule an inspection, please call 800-MOLDS (800-66537) or email hello@saniservice.com. Do not attempt to remove significant mold growth yourself, as improper handling can exacerbate spore dispersal and health risks.