How to permanently stop black mold from neighbor's AC drip?« Back to Previous Page

This is a very common issue here in Dubai, especially with the high humidity we just had. The problem isn't the mold itself—it's the constant water source from your neighbor's AC condensate drain line. Bleach only bleaches the surface pigment; it doesn't kill the roots (hyphae) and the water will just make it come back stronger.

First, you need to address the water intrusion at its source. This is actually covered under Dubai's Jointly Owned Property Law and the Dubai Strata Regulations. The management company or Owners' Association for your building is responsible for resolving issues originating from a common property element, which includes AC drainage lines. You need to formally notify them of the issue. They have an obligation to instruct your neighbor to rectify the dripping pipe, likely by extending it properly to a drain.

For the existing mold on the concrete, wiping it isn't enough. Porous materials like concrete can harbor mold deep within. A professional remediation is the only way to guarantee it's gone for good. We use industrial-grade antimicrobial agents that penetrate and encapsulate the surface, preventing regrowth. For a balcony, this might also involve light abrasive blasting to remove all contaminated material.

The long-term solution is a two-part process: 1) Force the building management to fix the neighbor's drain pipe to stop the water, and 2) Have a professional company like ours properly treat and seal the affected concrete.

Given that it's already visible, I'd highly recommend a proper inspection. We can document the source and extent for your report to the building management and provide the correct treatment. Feel free to call us for a assessment at 800-MOLDS (800-66537) or email hello@saniservice.com. Let's get that sorted properly.