Cement grout lines can collect dirt, mold, and grime over time, especially in bathrooms and kitchens. This article provides a practical, step-by-step approach to restoring grout to a clean, like-new appearance using common tools and safe methods suitable for most American homes.
Readers will find a clear workflow that highlights equipment options, safety considerations, and proven techniques to prevent quick re-soiling. The guidance emphasizes staying gentle on delicate tile finishes while delivering strong cleaning results.
Quick Answer
Quick Method: Start with a dry brush to remove loose debris, apply a grout cleaner or a simple baking soda paste, scrub with a stiff nylon grout brush, rinse well, and repeat if needed. For tough staining, consider a steam cleaner or an oscillating multi-tool blade with a grout removal tool to widen the grout slightly for deeper cleaning and resealing later.
What You’ll Need
- Grout cleaning brush stiff nylon
- Grout removal tool oscillating multi-tool blade
- Electric grout cleaning machine
- Tile grout steam cleaner
- Grout cleaning kit with scrubber sponge
Before You Start
Inspect the tiled area for loose tiles or cracked grout. Repair any damage before cleaning to prevent moisture from seeping behind tiles. Work in a well-ventilated area, especially if using chemical cleaners. Wear protective gloves and eye protection, and test cleaners on a small, inconspicuous spot first. Allow surfaces to dry completely between cleaning passes.
Time estimate: Most sessions take 30–90 minutes per area, depending on grout depth and staining. Plan for multiple passes if mold is present or grout is heavily stained.
Step-By-Step: How To Clean Cement Grout
- Clear the area and remove any loose debris from tile surface with a dry brush or vacuum.
- Choose a cleaning approach: mild cleaner for everyday grime, or a stronger cleaner for mold and deep staining.
- Apply cleaner to grout lines, following product directions. For a DIY option, mix a paste of baking soda and water or hydrogen peroxide for stubborn stains.
- Let the cleaner sit for 5–10 minutes to loosen embedded grime, but do not let it dry completely.
- Scrub each grout line with a grout cleaning brush stiff nylon, applying firm, even pressure along the grout line.
- Rinse with clean water and inspect. If stains persist, repeat or switch to a more robust method, such as a steam cleaner or grout removal tool for deep penetration.
- For severe discoloration, consider using a tile grout steam cleaner to sanitize and lift grime without harsh chemicals.
- If using an oscillating tool, use a grout removal tool oscillating multi-tool blade carefully to slightly reset the grout edge and create room for fresh grout if resealing is planned.
- Allow grout to dry completely, then apply a grout sealer to protect against future staining.
- Test the sealer in a small area before full application and follow manufacturer guidelines for coverage and curing time.
- Wipe away any excess sealer and return to normal use after the recommended cure period.
- Document areas that require periodic maintenance to prevent future buildup and schedule routine cleaning.
Troubleshooting
| Symptom | Likely Cause | Fix | Prevention |
|---|---|---|---|
| Grout remains discolored after cleaning | Deep staining or cement color variation | Repeat cleaning with a stronger cleaner or mild acid-based cleaner in a small test area | Seal grout after cleaning to slow staining |
| Mold returns quickly | Persistent moisture or poor ventilation | Improve bathroom ventilation and dry surfaces after use | Use a mold-resistant grout sealant and breathable tiles |
| Tiles feel gritty after cleaning | Abrasive scrubbing damaged glaze | Switch to a gentler brush or reduce scrubbing pressure | Avoid over-abrading tile surfaces |
| Sealer beads on grout | Over-application or improper curing | Wipe excess sealer and allow full cure times | Follow exact product directions |
Common Mistakes
- Using overly harsh acids or bleach on natural stone grout, which can cause damage.
- Skipping a grout test patch before applying cleaners or sealers.
- Scrubbing too aggressively, which can erode grout joints and tile glaze.
- Cleaning not drying thoroughly, promoting mold regrowth.
Tips For Best Results
- Work in small sections to keep cleaners from drying on the grout too long.
- For routine maintenance, a weekly light scrub helps prevent heavy buildup.
- Match cleaner strength to stain type—gentle cleaners for everyday grime, stronger options for mold.
- Pair cleaning with a sealant to extend the lifespan of clean grout and reduce future staining.
- Use a steam cleaner where water resistance allows; heat can loosen stubborn grime effectively.
Call A Professional
Consider contacting a pro if grout is cracked, extensively stained, or if tiles are loose. Signs to seek help include persistent moisture behind grout, extensive mold growth, or if the grout color has changed uniformly due to damage. A licensed contractor can regrout, reseal, or replace damaged sections and ensure proper moisture control.
FAQ
What is the best way to clean cement grout?
Use a suitable grout brush, a gentle cleaner for regular grime, and a steam cleaner or tough cleaner for stains. Seal after cleaning to protect results.
Can I use vinegar on cement grout?
Vinegar is safe for some grout types but can degrade cementitious grout over time. Test first and avoid acidic cleaners on delicate tiles.
How often should grout be sealed?
Typically every 1–2 years, depending on traffic and cleaning frequency; re-seal when grout color appears dull or stained.
Is it worth regrouting if cleaning doesn’t help?
Yes, regrouting can restore appearance and water resistance when cement grout is cracked or severely stained.
Can I use a professional cleaning service for grout?
Yes, professional services can offer deep cleaning, regrouting, or sealing for large areas or persistent problems.
Will cleaning damage my tile?
Follow manufacturer instructions, avoid harsh abrasives, and test products on a small area to prevent tile damage.
Buying Guide
Choosing the right tools for cement grout cleaning depends on grout type, tile material, and the level of staining. Consider size, noise level, energy efficiency, controls, and placement when evaluating options.
Size and weight affect handling, especially for handheld vs. electric machines. Noise levels vary by model; quieter options are preferable for bathrooms or shared spaces. Energy efficiency is usually a non-issue for cleaning tools, but battery-powered devices offer cordless convenience for larger areas.
Controls should be simple to operate with adjustable speed or agitation settings for different grime levels. Placement matters; choose a compact unit for tight corners and a model with an ergonomic grip for comfortable, prolonged cleaning. For most homes, a combination of a grout cleaning brush, a steam cleaner, and a dedicated grout cleaning kit provides flexibility across different grout challenges.
Carefully compare features like brush stiffness, water reservoir capacity, and compatibility with cleaners. Read product reviews and verify warranty coverage. If unsure, opt for a kit that includes multiple attachments to tackle both routine cleaning and tougher stains.