How to Maintain Tile Grout & Prevent Mould Buildup?

Maintaining your grout is just as important as cleaning the tiles themselves. Grout fills the gaps between tiles, helping to seal the tile joints. But over time, it can absorb moisture, trap dirt, and become a breeding ground for mildew or mould, especially in high-moisture zones like kitchens and bathrooms. To keep your tile surfaces clean and mould-free, regular grout cleaning routines and preventive care are essential.

From choosing the best tile grout cleaner to understanding the best way to clean grout, this blog covers everything for you. Whether you are tackling stubborn stains or avoiding mould growth, caring for grout is key to maintaining your tiled surfaces in the best conditions. So, let’s get started!

What is Grout? 

Grout is a cement-based material used in construction, mainly for filling gaps between wall and floor tiles. This grout compound helps keep the floor and wall tiles in place and gives a neat look to the tiled surface. It acts like an adhesive and a sealing agent, which prevents water, dirt, and debris from penetrating tiles’ cracks and crevices. Since grout works as a filler for tile joints, it is used to fill gaps and add strength to the tiled surface. Tiles are often made from porous materials; grout helps seal and protect them. It plays a crucial role in maintaining cleanliness and preventing the growth of mould or mildew. 

Whether you want to install new tiles or repair old ones, using the right grout is crucial for both durability and appearance. Grout makes tile surfaces stronger and more long-lasting by holding them firmly together. 

Why Grout Gets Dirty and Develops Mould?

Grout is a porous material, as it has minute holes called grout pores that allow water, dirt, and soap scum to enter. This makes it easy for the growth of mould in grout, especially in warm and damp places. When water gets trapped due to moisture retention, and the area remains wet, mould spores find a perfect spot to grow. 

High-risk spots like shower tiles and kitchen backsplash tiles are most affected because they are often exposed to water and steam. If there is poor ventilation, the moisture will not dry properly, and the problem will eventually get worse. Without enough airflow, humidity builds up. Also, when there is a sealing failure, the grout cannot resist moisture as it ideally needs to. Over time, dirt and soap scum stick to the grout, making it look dirty and discoloured. To prevent mould, it is vital to clean it regularly, seal the grout properly, and improve ventilation in wet areas. 

How Should You Clean Grout the Right Way at Home?

Cleaning tile grout properly keeps your bathroom and kitchen looking fresh and mould-free. If you are wondering how to clean grout, follow this simple, step-by-step guide. 

• Step 1: Start by dry brushing the grout lines with a grout brush or an old toothbrush to loosen surface dirt. 
• Step 2: Use DIY cleaners like a baking soda paste (mix baking soda with a little water) and apply it to the grout. 
• Step 3: Spray white vinegar over the paste. It will help break down the accumulated grime. 
• Step 4: Let the mixture sit for five to ten minutes and then scrub with your scrubbing tools. 
• Step 5: Rinse rigorously with warm water and dry with a cloth. 
• Step 6: For deeper stains, use hydrogen peroxide or a tile cleaner specifically made for stain removal and discolouration. 
• Step 7: A stream cleaner is also effective for stubborn stains and sanitising without chemicals. 
• Step 8: For floor areas, use the same steps. If you are asking how to clean floor tile grout, just ensure the surface is dry before applying any solution. 

These techniques are safe for most tiles and help preserve their look and finish. With regular usage, these methods make cleaning tile grout easier over time. For deeper bathroom cleaning solutions, explore our blog on how to clean bathroom tiles for expert-approved methods and maintenance tips.

How to Prevent Mould Buildup in Grout?

If you are wondering how to clean grout on tile floors and walls, you can follow the tips below. 

• Seal the Grout Properly: Apply a high-quality grout sealer to create a barrier against moisture. This prevents water from seeping into the grout. Reapply the sealer every six to twelve months to preserve its effectiveness. 

• Use an Exhaust Fan: Turn on the exhaust fan during and for at least 20 minutes after each shower to improve kitchen or bathroom ventilation and lower humidity levels. This helps keep the grout dry and mould-free. 

• Dry Tiles After Use: Wipe down tiles and grout lines with a tile drying cloth after every dish wash, bath, or shower. Removing surface water helps prevent mould buildup in damp areas. 

• Use Mould-Resistant Tiles: Choose mould-resistant grout when installing or regrouting. You can also spray antifungal spray on grout lines every week for extra protection. 

• Apply Silicone Sealant: Use silicone sealant around tubs, sinks, and corners. It is flexible and resists mould growth better than regular sealant. 

• Control Humidity Levels: Use a dehumidifier for humidity control in humid regions. Open windows when possible to allow fresh air and improve airflow. 

• Stick to Your Daily Maintenance Routine: Regularly clean the tile surfaces and grout to remove soap scum and mould spores before they grow. 

By combining regular cleaning, good ventilation, and moisture control, you can stop mould before it starts and keep your grout joints clean and safe. 

Pro Tips for Long-Term Grout Maintenance

To properly maintain your kitchen or bathroom tile and grout, consider the following tips. 

• Stick to a Sealing Schedule: Reapply grout sealer every six to twelve months to maintain a strong barrier against moisture and stains. This simple step extends your grout’s lifespan and helps prevent long-term damage. 

• Clean Up Spills Immediately: Wipe up water, soap, and any spills right away to deal with mildew prevention issues. Long-term humidity can cause stains and lead to mould growth if you do not address it quickly. 

• Deep Clean Regularly: Schedule deep cleaning once a month or at least every quarter. Use a stream cleaner or a baking soda and vinegar solution to lift grime and disinfect grout lines thoroughly. 

• Practice Prevention Care: After every shower, use a towel to dry tiles and grout. Regularly dry the surfaces to reduce the chances of mould growth and support overall tile and grout cleaning. 

• Inspect and Restore When Needed: Check grout lines for wear and tear. If grout is discoloured or faded, you can consider grout restoration to refresh its appearance and reinforce surface protection. 

Promote Tile Hygiene: Routine kitchen or bathroom maintenance protects grout and boosts tile longevity and hygiene. It keeps your bathroom or kitchen looking fresh and reduces repair costs.