How to permanently remove mold from humid bathroom grout?« Back to Previous Page

Scrub the grout with a paste of baking soda and white vinegar or a dedicated hydrogen peroxide-based cleaner (check labels for 3-5% concentration). This is a surface-level fix. The key is addressing the humidity; in a windowless Dubai bathroom, an exhaust fan alone is often insufficient.

For a long-term solution, you must get the space dry. Run a powerful dehumidifier in the bathroom for several hours after each shower. Consider upgrading your exhaust fan to a higher-capacity model (measured in CFM) to actively pull the moist air out. Consistently wiping down shower walls and squeegeeing water after use is critical.

If the mold reappears quickly despite these efforts, the growth may be behind the tiles. In high-rises with persistent humidity, this is common. A professional inspection using a moisture meter can determine if the wall cavity is affected. Remediation would then require removing the grout, treating the substrate, and regrouting with a mold-inhibiting additive. For severe, recurring cases, a company with its own microbiology lab can identify the species to confirm it's a surface mold and not something more persistent.