Tile flooring is a popular choice for commercial spaces thanks to its durability and ease of maintenance. However, even the cleanest floors can lose their appeal if the grout lines become stained or discoloured. Grout is porous by nature, meaning it absorbs dirt, grease, and grime over time. For businesses that want to maintain a polished, professional image, knowing how to clean grout on tile floor properly is essential.
This step-by-step grout cleaning guide for home and commercial settings is designed to help you understand what works, what doesn’t, and when to call in expert services who know cleaning methods for such materials. For businesses looking for professional assistance, trusted Commercial Cleaners Kitchener like Kings Cleaners offer specialised tile and grout cleaning services to keep commercial floors spotless and well-maintained.
Understanding Grout: Why It Gets Dirty
Grout is the filler used between tiles to keep them in place and prevent moisture from seeping underneath. Because it is porous, grout easily absorbs spills, dust, and debris. High-traffic commercial environments such as office buildings, medical clinics, and retail stores are especially prone to grout discoloration due to frequent footfall, coffee spills, and cleaning product residue.
1. Dry Brushing and Vacuuming
Before applying any cleaning solution, start by brushing the grout lines with a stiff nylon brush. This loosens surface-level debris. Follow up with a commercial-grade vacuum to remove the loosened dirt. This method helps prevent dirt from turning into a slurry when combined with liquid cleaners.
2. Alkaline Cleaning Solutions
Alkaline cleaners are effective at breaking down grease and organic residue. Apply the solution directly onto the grout lines and allow it to dwell for 5–10 minutes. Scrub the lines using a grout brush and then rinse thoroughly. This method works well in kitchens, cafeterias, and food-prep areas.
3. Steam Cleaning

Steam cleaning uses high-temperature vapour to lift dirt from deep within grout pores. It’s an excellent method for environments where chemical use needs to be minimised. A cleaner who knows this method of cleaning will typically use professional-grade steam machines to target embedded grime.
4. Oxygenated Bleach Solution
Mixing oxygen bleach with warm water creates a powerful yet safe grout cleaner. Apply the mixture generously and allow it to sit for up to 15 minutes before scrubbing and rinsing. This method is effective for removing stubborn stains from tile grout, especially in restrooms and entryways.
5. Acid-Based Cleaning (Use with Caution)

Acidic cleaners can be effective on very stained grout but should only be used on unsealed grout and never on natural stone tiles. These cleaners work by dissolving the outer layer of grime. It’s important to rinse the area thoroughly to neutralise the acid after use.
6. Baking Soda and Hydrogen Peroxide Paste
This DIY solution is often used in less intensive settings. Mix baking soda and hydrogen peroxide to form a paste, apply it to the grout, and scrub gently. While not ideal for large commercial spaces, it can be used for spot treatment or smaller areas.
7. Encapsulation Cleaning
This method uses polymers that surround and lift dirt from grout lines when agitated with a rotary brush. Once dry, the residue is vacuumed away. It’s an excellent low-moisture option suitable for office environments and places with sensitive flooring.
8. Colour Sealing (Post-Cleaning)
Once grout has been thoroughly cleaned, applying a colour sealant can help protect it from future staining. This also gives grout a uniform appearance and reduces future maintenance needs.
When to Call the Professionals
Even with the right knowledge and tools, grout cleaning can be time-consuming and physically demanding. Businesses with large floor areas or deeply embedded stains may benefit from hiring a cleaning expert in Kitchener. Professionals use high-grade, commercial products and machinery to deliver long-lasting results with minimal disruption to daily operations.
Grout maintenance is more than just cosmetic. Clean grout contributes to a healthier, more hygienic environment and reinforces the professionalism of your business space. Knowing how to clean tile grout effectively is just the first step keeping it that way requires regular attention. At Kings Cleaners, we specialise in commercial tile and grout deep cleaning using advanced tools and industry-proven techniques. Contact us today for a professional cleaning quote and keep your floors looking their best year-round.