Can I fix recurring shower mold myself or need a pro?« Back to Previous Page

My ensuite bathroom in our Jumeirah apartment has developed black spots along the grout of the shower and a constant damp smell, especially after the humidity this past month. I tried scrubbing it with bleach, but it just faded a bit and came back darker a week later. Is this something I can fix myself with a stronger product from ACE Hardware, or do I need to call in a professional cleaning service to stop it for good?
Posted by Joseph Garcia
Asked on March 21, 2026 2:13 pm
Based on your description, this is a classic case of recurring mold growth, a very common issue in Dubai bathrooms due to our high humidity levels and the constant cycle of condensation from air conditioning. The fact that the black spots returned after bleaching is a significant indicator that this is not a surface-level issue. Bleach is ineffective on porous materials like grout and cement; it only bleaches the surface mold while the hyphae (root structure) penetrate deep into the material, allowing it to regrow stronger.

For a temporary fix, you could try a dedicated, acid-based grout cleaner from a hardware store. However, this is unlikely to provide a permanent solution. The persistent damp smell strongly suggests hidden moisture and potential mold growth behind the tiles or within the wall cavity, which DIY methods cannot address. The UAE's building codes and public health guidelines emphasize the importance of proper remediation to prevent microbial amplification, which can affect indoor air quality and occupant health.

For a permanent resolution, a professional inspection is highly recommended. We use specialized tools like borescopes and moisture meters to assess the extent of the problem behind the walls. Our remediation process at Saniservice involves isolating the area, using industrial-grade HEPA filtration to capture spores, and applying EPA-approved antimicrobial agents to eliminate the colony at its root, followed by sealing to prevent recurrence.

To schedule an inspection and get a definitive solution, please call our experts at 800-MOLDS (800-66537) or email hello@saniservice.com.
Posted by Sani Admin
Answered on March 24, 2026 7:59 am