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How to Remove Mould from Bathroom Grout

Published on Aug 12, 2022

how to clean dirty grout lines

Bathroom grout in your tiles is notoriously tough to get rid of. That dirty and grimy mould or mildew can be treated with just a few simple products.

You’ll be surprised at what a difference this process is going to make to the overall look of your bathroom!


Effective Methods to Remove Mould From Bathroom Grout

close up short of dirty tile and grout

What causes black mould on grout?

Mould needs humidity and moisture to grow, meaning your bathroom is highly susceptible to growth.

Grout is particularly prone to mould because of how it is structured. Grout is porous so it can effectively do its job of protecting your tiles. However, its absorbency also makes it the ideal area for mould to accumulate.

Mould requires immediate action, as it looks unsightly and can pose health risks to you and your family. To get you started, check the most common mould hotspots in your home.


How to Remove Mould from Grout

cleaning mould from grout

You may have seen mould on your walls before, but dark, grimy grout in your tiles is fairly commonplace in most bathrooms.

Cleaning your grout is easier than you may think. Here’s where to start.

  1. Wipe down the tiled area to soak up any moisture or slimy grime before you begin.

  2. Create a paste using baking soda and water. Aim to make its consistency similar to toothpaste.

  3. Apply it to the grout lines generously and leave it for around 30 minutes.

  4. Use an old toothbrush or specific grout brush to scrub the lines and wipe the area down thoroughly. Keep in mind that baking soda may make your floors a little gritty, so take your time with this step.

  5. Create a mixture of vinegar and water with a 1:1 ratio. Spray carefully onto the area but try not to get any spray on the tiles themselves, especially if they are natural stone.

  6. Leave for 10 minutes and wipe down with warm water.

So, why do these solutions work? Vinegar can naturally treat mould because of its antifungal and antibacterial properties – it is an inexpensive yet effective way of treating smaller mould infestations.

Note that you should only be spraying vinegar on sealed grout as vinegar can penetrate into the spaces of unsealed grout, which can cause deterioration over time.

Baking soda is effective here because the mildly abrasive properties of the baking soda helps lift dirt from the porous grout.


Professional Cleaning Services for Stubborn Mould

Electrodry Tile and Grout Cleaning Technician

Electrodry offers a tile and grout cleaning service, specifically targeting grimy grout lines. Our process effectively removes dirt, grease and bacteria from grout, restoring a clean, fresh look.

If your grout mould or mildew is stubborn or particularly severe, you may need to call in a professional cleaning service. A professional will have industry-standard cleaning solutions and equipment, as well as the expertise to handle the job effectively, safely and efficiently.

Sometimes bathroom tile mould and mildew need something more powerful. Electrodry’s Mould and Mildew Treatment combines our Restorative Cleaning process with Chlorosan, an antimicrobial stain removal solution designed for mould-affected tiles and grout.


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