Grout is essentially compressed cement. It absorbs everything that touches it — and bleach only hides that.
Every drop of water, every cooking splatter, every soap residue and every footprint sinks into grout rather than sitting on top of it. Over months and years, those layers of fine grime build up below the visible surface, where domestic mops cannot reach. The result is the floor most London homeowners are familiar with: clean tiles, dirty lines.
Worse, repeated bleach treatments erode the cement structure of grout itself — making it more porous, not less. Each application looks bright for a week and then darker than before. The only durable fix is removing the embedded dirt under pressure, then sealing the porous surface so it stops absorbing.
Cleaning without sealing lasts months. Cleaning with sealing lasts years. We do both as standard.
We identify your grout type — sanded, unsanded, epoxy, or natural cement — and test a small area. Some grout responds to deep cleaning; severely stained grout may need colour sealing instead.
A high-alkaline solution is applied to dwell on the grout lines, breaking down embedded grease, soap scum, mould residue and biological staining at a molecular level.
High-pressure hot water is delivered through a rotary tool that scrubs and vacuums simultaneously. The dirt and the dirty water leave together — nothing soaks back in.
Penetrating sealer for grout in good condition, full colour sealing for grout that will not return to a uniform shade. Either way, the result is locked in.
Different grout problems need different fixes. We offer all of them — and tell you which one your floor needs, honestly.
Pressurised extraction with alkaline pre-treatment. Restores grout to its original shade where staining is surface-level.
Pigmented sealer locked into grout lines. Restores uniform colour, waterproofs the joint, lasts 10–15 years.
Antifungal penetration into bathroom and shower grout. Treats the cause, not just the visible spots.
For grout that is cracked, missing or structurally failed. We remove and replace rather than disguise.
High-moisture and high-traffic rooms see grout failure first. They’re also where the visual difference is most dramatic.
Kitchens. Cooking oils mist across floors and walls, settling into grout near hobs, splashbacks and behind cookers. Even an immaculately cleaned kitchen develops yellowing grout within a year if it’s never sealed.
Bathrooms & showers. Constant moisture saturates unsealed grout, creating perfect conditions for mould and biological staining. Once it’s in, only deep treatment — not surface bleach — resolves it.
Hallways & entrances. Foot traffic carries street grit directly into grout lines. After two or three years the grout looks several shades darker than the tile around it.
No filters, no staging. The difference is the method — and the seal.
No high-pressure sales. No call-out fees. No surprise costs after the work starts.
Some grout is too far gone to deep-clean and is better colour-sealed or replaced. We will tell you which honestly, even when it costs us the upsell.
Most competitors clean and walk away — leaving porous grout to re-stain in months. Penetrating seal is part of our standard process, not a bolt-on.
We hold a range of pigmented grout sealers to match common UK grout colours: white, ivory, beige, grey, charcoal, anthracite. You get the original colour back, not just lighter.
A free on-site assessment, then a written quote. No call-out fee. The price is the price — whether the work takes us two hours or six.
If your question isn’t here, just call — we’ll tell you straight.
Free on-site assessment. Fixed written quote. No call-out fee. Most quotes booked the same week.