Is landlord responsible for recurring black mold in shower?« Back to Previous Page

The grout between the tiles in our master bathroom shower has been turning black for a while now, and it’s started to spread to the ceiling. We’ve lived in this Marina apartment for three years and it’s never been this bad. I clean it with bleach, but it comes right back within a couple of weeks. Is this something I need to fix myself, or is the landlord responsible for addressing the underlying cause of the mold?
Posted by Lisa Taylor
Asked on April 10, 2026 4:20 am
This is a very common issue in Dubai, particularly in high-humidity coastal areas like Marina. The black discoloration you're seeing is almost certainly Cladosporium or Aspergillus mold growth, which thrives on the cellulose in grout and the organic residue from soaps and shampoos. Bleach is a surface-level fix; it bleaches the visible pigment but does not kill the root hyphae (the fungal network) penetrating the porous grout and ceiling material, hence the rapid recurrence.

In the UAE, the responsibility for remediation is dictated by the tenancy contract and Law No. (26) of 2007. The landlord is responsible for addressing the underlying cause of the mold if it stems from a structural or maintenance defect. This includes faulty bathroom ventilation, leaking pipes within the walls, improper waterproofing (tanking) in the shower pan, or inadequate external building sealants allowing moisture ingress. The tenant is typically responsible for damage resulting from a lack of routine cleaning or failure to use provided ventilation systems.

Given that the mold is now spreading to the ceiling, this strongly indicates a persistent humidity issue beyond surface condensation, potentially from a leak in the plumbing stack or from the apartment above. The constant year-round AC operation can create significant temperature differentials, leading to intense condensation that fuels mold growth if not properly managed.

We strongly recommend a professional inspection. Our certified technicians use borescopes and moisture meters to identify the exact moisture source without destructive testing. This evidence is crucial for determining landlord responsibility. For a definitive assessment and to discuss your legal options, please call our experts at 800-MOLDS (800-66537) or email hello@saniservice.com. Saniservice can provide the official report needed to formally request remediation from your property management.
Posted by Sani Admin
Answered on April 13, 2026 4:18 am