Lay a polished concrete patio.

Polished concrete has crossed over from commercial spaces and architect-designed kitchens into the UK garden. The look is unmistakable — a smooth, seamless surface that reads almost like resin or stone but with the rich, mottled texture of concrete. This guide covers what a polished concrete patio actually costs installed in 2026, the multi-step finishing process, and the limitations you should know before committing.

This is a specialist finish — most paving contractors don't do it. You're looking for a polished concrete specialist or a high-end landscape contractor with the right diamond-grinding kit.

What Does the Work Involve?

• Excavation and 100 mm compacted MOT Type 1 sub-base.
• Reinforced concrete pour with steel mesh (A142 minimum).
• 100 mm slab with 7-day initial cure under sheeting.
• Multi-stage diamond grinding — progressively finer grits to expose aggregate and polish surface.
• Densifier application (chemically hardens the surface).
• Sealing — multi-coat penetrating sealer plus optional topcoat.

Typical Costs

Most cost goes into the polishing stage rather than the concrete itself. Choosing the level of polish (matte / satin / high-gloss) significantly affects price.

How Long Does It Take?

• Pour day: 1 day.
• Cure under sheeting: 7 days minimum.
• Polish + sealing: 3–5 days.
• Full strength: 28 days from pour.

DIY or Professional?

Specialist only. The grinding kit costs £10,000+, the technique takes years to master, and mistakes during polishing can't be reversed. Hire a polished concrete specialist (not a general builder) for this.

Choosing the Right Tradesperson

• Look at completed jobs (preferably outdoor — indoor polished concrete is more forgiving).
• Ask about UV stability of their topcoat — some indoor sealers degrade in sunlight.
• Confirm the grit levels of their grinding sequence (50, 100, 200, 400, 800 minimum for good polish).
• Get a written maintenance schedule — resealing every 3–5 years is typical.
• 5-year warranty on surface integrity is standard.

UK Regulations

• Standard planning rules — over 5 m² impermeable in front garden needs drainage.
• Polished concrete is entirely impermeable.

Common Problems

• Surface yellowing — wrong sealer in UV exposure. Specialist outdoor sealers prevent this.
• Hairline cracks — concrete shrinks as it cures. Saw-cut expansion joints control where it cracks.
• Slipperiness when wet — high-gloss polish is hazardous outdoors. Matte or satin finish recommended.
• Sealer wear in high-traffic areas — expect to reseal every 3–5 years.
• Difficulty patching damage — the polished surface can't be invisibly repaired. Plan for replacement of whole panels if damaged.

Frequently Asked Questions