Black bathroom grout in Dubai: DIY or call a pro?« Back to Previous Page

Black grout in a Dubai bathroom is almost certainly mould, thriving on the humidity from showers and condensation. Bleach often fails because it only lightens the surface stain without killing the root structure embedded deep in the porous grout.

In many Jumeirah Village Circle villas, this indicates a persistent moisture issue. If the mould returns quickly after cleaning, the problem is likely behind the tiles or in the wall cavity, especially if there's a hidden pipe leak or insufficient waterproofing. A musty smell is a strong indicator of a larger issue.

For a small, surface-level patch, a dedicated mould-removing grout cleaner or a paste of baking soda and vinegar can be attempted. However, if the discoloration is widespread, recurrent, or you suspect hidden growth, a professional inspection is advised. They use moisture meters and borescopes to assess the walls without demolition.

Costs for an inspection vary significantly based on the company's credentials and the inspection's scope. You are paying for the diagnostic expertise and the detailed action plan, not just a visual look. Always request a methodology that includes moisture mapping and, if necessary, air or surface sampling to be analysed at a microbiology lab to identify the mould type. This evidence-based approach is crucial for determining the correct remediation strategy, which prevents it from simply returning next season.