Tile grout is the unsung hero of your Glasgow home’s bathrooms and kitchens. It holds tiles in place, prevents water damage, and creates a finished look. But grout is also porous, which means it absorbs dirt, grease, and moisture — leading to discolouration, mould, and stains that can make even the newest tiles look old and neglected.
At BuZy Bees Cleaning, we tackle grout cleaning as part of our deep cleaning services across Glasgow. In this guide, we share professional techniques for restoring your grout to its original colour and keeping it clean long-term.
Why Grout Gets Dirty
Grout is made from cement, sand, and water — a porous mixture that readily absorbs:
- Soap scum and body oils — From daily showers and baths
- Mould and mildew — Thriving in damp, poorly ventilated bathrooms
- Cooking grease and food splatters — In kitchen splashback areas
- Hard water minerals — Leaving white, chalky deposits on grout lines
- General dirt and dust — Accumulating in the tiny pores over time
Grout can become discoloured within 6 months of installation if not properly sealed and maintained. — Tile Association UK
Key Factors for Effective Grout Cleaning
Grout Type
- Cement-based grout — Most common, porous, requires sealing
- Epoxy grout — More resistant to stains, harder to clean if dirty
- Sanded vs unsanded — Sanded grout is more durable but more porous
Tile Material
Natural stone tiles (marble, travertine) require pH-neutral cleaners. Ceramic and porcelain tiles can handle stronger solutions.
Severity of Staining
Light surface dirt responds to simple cleaning. Deep-set mould or years of neglect may require professional treatment or re-grouting.
How to Clean Tile Grout: Step-by-Step
Method 1: Baking Soda and Vinegar (For Light to Moderate Stains)
- Make a paste — Mix 3 parts bicarbonate of soda with 1 part water to form a thick paste.
- Apply to grout — Spread the paste along grout lines using an old toothbrush or grout brush.
- Spray with vinegar — Fill a spray bottle with white vinegar and spray over the paste. It will fizz — this is the chemical reaction lifting the dirt.
- Let it sit — Leave for 10-15 minutes to work.
- Scrub — Use a stiff brush to scrub along the grout lines.
- Rinse — Wipe away with a damp cloth and warm water.
- Dry — Use a clean, dry cloth to prevent moisture buildup.
Method 2: Hydrogen Peroxide (For Stubborn Stains and Mould)
- Mix a solution — Combine equal parts hydrogen peroxide (3%) and water.
- Apply to grout — Use a spray bottle or cloth to apply to stained areas.
- Let it sit — Leave for 15-20 minutes.
- Scrub — Use a grout brush or old toothbrush to scrub.
- Rinse thoroughly — Remove all residue with clean water.
- Dry completely — Prevent mould regrowth by drying thoroughly.
:::warning Safety Warning Always wear gloves when using hydrogen peroxide. Ensure good ventilation. Never mix hydrogen peroxide with vinegar or bleach. :::
Method 3: Oxygen Bleach (For Heavy Discolouration)
- Mix oxygen bleach — Follow manufacturer instructions (usually 1 scoop per litre of water).
- Apply to grout — Pour or spray onto the grout lines.
- Let it sit — Leave for 30-60 minutes for deep cleaning.
- Scrub — Use a stiff brush to work the solution into the grout.
- Rinse thoroughly — Remove all residue.
- Dry — Use a dry cloth or towel.
Method 4: Steam Cleaning (For Deep Cleaning Without Chemicals)
- Fill steam cleaner — Use plain water (no chemicals needed).
- Apply steam — Hold the nozzle close to grout lines for 10-15 seconds per section.
- Wipe away — The steam loosens dirt; wipe immediately with a cloth.
- Scrub if needed — For stubborn areas, follow with a brush while steam is applied.
Grout Cleaning by Location
| Location | Common Issues | Best Method |
|---|---|---|
| Bathroom walls | Soap scum, mould | Baking soda + vinegar, steam |
| Bathroom floor | Dirt, mildew, hard water | Hydrogen peroxide, oxygen bleach |
| Kitchen splashback | Grease, food stains | Baking soda paste, degreaser |
| Kitchen floor | Dirt, grease, spills | Oxygen bleach, steam cleaner |
| Shower enclosure | Mould, soap scum | Hydrogen peroxide, steam |
Tips for Keeping Grout Clean Longer
- Seal your grout — Apply a grout sealer every 6-12 months to create a protective barrier.
- Ventilate bathrooms — Run the extractor fan or open windows during and after showers.
- Wipe tiles after showering — A quick squeegee or towel wipe reduces moisture and soap scum.
- Clean spills immediately — In kitchens, wipe up food and grease before they absorb into grout.
- Use a daily shower spray — Prevents soap scum buildup on bathroom tiles and grout.
- Avoid abrasive tools — Scrubbing with wire brushes damages grout and makes it more porous.
- Mop with the right solution — Use pH-neutral cleaners on tiled floors to prevent grout damage.
:::tip Pro Tip After cleaning grout, apply a grout sealer to protect against future stains. Sealed grout is much easier to maintain and stays cleaner for longer. :::
When to Re-Grout
Sometimes cleaning is not enough. Consider re-grouting if:
- Grout is cracked, crumbling, or missing
- Mould has penetrated deep into the grout
- Discolouration persists after thorough cleaning
- Grout is more than 10-15 years old
- Water is seeping behind tiles
Re-grouting is a more involved process that may require professional help, especially for large areas or delicate tiles.
When to Hire Professional Grout Cleaners
Professional help is recommended for:
- Large areas of stained or mouldy grout
- Natural stone tiles requiring specialist care
- Persistent mould that DIY methods cannot remove
- Re-grouting projects
- End of tenancy or pre-sale cleaning
“Our deep cleaning service includes thorough grout cleaning using professional-grade steam equipment and safe, effective cleaning solutions. We restore grout to its original colour without damaging your tiles.” — BuZy Bees Cleaning Team
Get Your Professional Grout Cleaning Quote
Struggling with stained or mouldy grout? BuZy Bees Cleaning provides professional grout and tile cleaning as part of our deep cleaning services across Glasgow.
Call us on 07598 046 576 or fill out our online form for a free, no-obligation quote. Let us restore your tiles and grout to their original beauty.
BuZy Bees Cleaning — Professional domestic cleaning services in Glasgow. Fully insured, eco-friendly, and trusted by homeowners across the city.
