How To Clean Grout - Tile Grout Cleaning Guide

Grout plays a crucial role in keeping your tiles secure and looking beautiful — but it’s also the part that gets dirty the quickest. Whether you’re dealing with mouldy shower grout, stained kitchen floors or old renovation residue, this complete UK guide will show you the safest and most effective way to clean and maintain grout.

We’ll also highlight professional-grade products available from TileExperience.co.uk that make the job faster, easier and longer-lasting.

Why Does Grout Get Dirty?

Unlike tiles, grout is porous, which means it easily absorbs:

  • Moisture

  • Soap scum

  • Grease

  • Dirt

  • Body oils

  • Cleaning product residue

This makes grout vulnerable to:

  • Mould & mildew

  • Discolouration

  • Efflorescence (white powder-like residue)

  • Staining

Homes in the UK — especially older houses and small bathrooms — often have higher humidity, which speeds up mould growth.

Before You Start: Check Your Tile & Grout Type

Not all cleaning methods are safe for all tiles. Before you clean, check:

✔ Tile Type

  • Ceramic / Porcelain → Most cleaners are safe

  • Natural Stone (limestone, marble, travertine, slate) → Avoid acidic cleaners

  • Polished surfaces → Use only mild/pH-neutral cleaners

✔ Is the Grout Sealed?

Unsealed grout stains more easily and requires gentler cleaning.

✔ Ventilation

Open windows, run extractor fans — especially when using strong cleaners.

Best Methods to Clean Grout (Safely & Effectively)

Below are the best UK-approved, tile-safe methods.

1. Use a pH-Neutral or Specialist Grout Cleaner (Recommended)

This is the safest and most effective option for regular cleaning.

Recommended Product from TileExperience

Mapei Ultracare Multicleaner
Safe for most wall and floor tiles. Removes grease, dirt and general grime.

How to Use It

  1. Apply directly to grout lines

  2. Allow 5–10 minutes to penetrate

  3. Scrub gently with a soft grout brush

  4. Rinse thoroughly with clean water

Great for:

  • Everyday dirt

  • Shower grout

  • Light discolouration

2. Deep Clean for Stubborn Stains, Grout-Haze & Cement Residue

After tiling or years of buildup, grout may need a stronger cleaner.

Recommended Product from TileExperience

Projoint Eliminator – Grout Haze & Cement Residue Remover
Removes grout haze, cement film and stubborn deposits.

For acid-resistant tiles only

Mapei Ultracare Acid Cleaner is another powerful option for heavy deposits.

⚠ Do NOT use acidic cleaners on:

  • Marble

  • Limestone

  • Travertine

  • Polished stone

  • Soft natural ston

3. Mild Homemade Cleaning Solution (Light Maintenance)

For everyday upkeep:

Simple pH-Neutral Method

Mix:

  • Warm water

  • A few drops of mild detergent

Scrub with:

  • Soft cloth

  • Soft-bristle brush

⚠ Avoid:

  • Bleach (can yellow grout over time)

  • Vinegar (acidic — unsafe on stone or sealed grout)

  • Harsh abrasives (damage tiles & sealer)

This method is suitable for:

  • Weekly cleaning

  • Light bathroom maintenance

  • Keeping kitchen floors fresh

Step-by-Step: How to Clean Grout Properly

Follow this professional method for best results:

Step 1 — Clear the Area

Remove mats, bins, shower bottles, or furniture.

Step 2 — Pre-Wet the Area

Lightly dampen the grout with warm water — helps cleaner absorb evenly.

Step 3 — Apply Cleaner

Use either:

  • pH-neutral cleaner

  • Intensive grout cleaner (for stubborn stains)

Step 4 — Let It Sit

Typically 5–15 minutes depending on product instructions.

Step 5 — Scrub Gently

Use a soft grout brush. Avoid metal brushes.

Step 6 — Rinse Well

Rinse with warm, clean water to remove all residues.

Step 7 — Dry Thoroughly

Use a towel or microfibre cloth.
Good ventilation reduces mould returning.

Aftercare: Seal, Maintain & Protect Your Grout

To keep grout cleaner for longer:

✔ 1. Seal Your Grout (Very Important)

Sealing your grout:

  • Reduces staining

  • Repels moisture

  • Makes cleaning 5× easier

  • Helps prevent mould

TileExperience stocks a range of grout sealers:

✔ 2. Use pH-Neutral Cleaners for Regular Maintenance

This prevents erosion of grout or sealer.

✔ 3. Improve Ventilation

Especially in UK bathrooms where humidity is high.

✔ 4. Dry After Showers

Quick towel dry = significantly less mould.

When Cleaning Isn’t Enough: Re-Grouting or Professional Cleaning

Sometimes grout is beyond saving.

Consider re-grouting if:

  • Grout is cracked

  • Crumbling

  • Permanently stained

  • Flaking or powdery

  • Has black mould deep inside

For large areas or commercial settings, professional tile & grout cleaning is often worth the cost.

Frequently Asked Questions (FAQs)

Can I use bleach on grout?

It may work, but it can yellow white grout, damage sealant and erode the grout surface. pH-neutral cleaners are safer long-term.

Can I use vinegar?

Avoid vinegar on natural stone, sealed grout and polished finishes. It is acidic and can cause etching or dullness.

How often should I clean grout?

Light cleaning weekly, deep cleaning every 2–3 months, and resealing every 12–18 months.

Why does my grout go black?

Black grout is mould caused by moisture and poor ventilation. Improve airflow and use anti-mould products.

How long does grout last?

With proper maintenance, grout should last 15–20 years.

 

Final Thoughts

Clean grout transforms any room — making tiles look brighter, newer, and more premium. With the right cleaners and regular maintenance, you can keep your tiles looking immaculate year-round.

TileExperience offers a full range of specialist UK-approved cleaning and aftercare products to help keep your grout in perfect condition.