How to remove black mold from bathroom grout myself?« Back to Previous Page

Black mold on bathroom grout is extremely common in Dubai due to the high humidity and constant condensation from air conditioning. The area behind your toilet is a prime spot because it lacks airflow and stays perpetually damp.

For a DIY approach, start with a simple but effective solution: a paste of baking soda and white vinegar. Scrub it into the grout with a stiff brush, let it sit for 15 minutes, then rinse. For more stubborn spots, a diluted chlorine bleach solution (1 part bleach to 4 parts water) can be used, but ensure the room is extremely well-ventilated and you are wearing gloves and a mask.

The key to preventing its return is managing moisture. Run your exhaust fan for at least 30 minutes after every shower. Wipe down the wet tiles and grout lines with a squeegee or towel. Consider a small portable dehumidifier for the bathroom if the dampness persists.

Under Dubai rental law (RERA), landlords are typically responsible for rectifying issues related to building integrity and persistent dampness that is not due to tenant misuse. Since this is a recurring problem linked to poor ventilation—a building design or maintenance issue—it is reasonable to report it to your landlord. Document the issue with photos and a polite request for a permanent solution, such as checking the exhaust fan's functionality or improving the ventilation system.

If the mold is extensive, has penetrated behind the tiles, or returns quickly after thorough cleaning, a professional inspection is recommended to assess the full extent and identify any hidden moisture sources.