Should I choose 20mm or 30mm quartz worktops?

30mm is the UK standard and suits traditional, shaker, and transitional kitchens. 20mm suits handleless, contemporary designs with clean horizontal lines. Both use the same quartz composition and carry the same warranty — the choice is aesthetic.

What is the price difference between 20mm and 30mm quartz?

20mm quartz costs approximately £130 less per slab than 30mm. Both thicknesses include the same all-inclusive fitting service from Quartz Store.

Is 20mm quartz strong enough for a kitchen worktop?

Yes. 20mm quartz uses the same composition as 30mm and carries the same 10-year warranty. The only structural difference is that 20mm requires support for overhangs beyond 200mm, while 30mm manages up to 300mm without brackets.

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20mm vs 30mm Quartz Worktops: How to Choose

2 April 2026 20mm vs 30mmquartz thickness

30mm outsells 20mm by roughly two to one at Quartz Store. The thicker option has become the UK standard, but 20mm has a considered place in certain kitchen designs. Your choice depends on style, not quality.

30mm: The UK Standard

Most UK kitchen suppliers default to 30mm quartz. It delivers a substantial visual presence — the edge profile reads clearly and the worktop feels solid. Traditional, shaker, and transitional kitchens suit 30mm naturally. The thicker slab also allows for more detailed edge profiling.

30mm Advantages

Wider range of edge profiles available (bullnose, ogee, pencil round)
Stronger unsupported overhang capability — up to 300mm without brackets
More forgiving during fitting — the extra mass stabilises the slab
Perceived quality by buyers at resale

20mm: The Contemporary Choice

Handleless kitchens with clean horizontal lines suit a thinner profile. 20mm quartz aligns with the pared-back aesthetic of German and Scandinavian-influenced design. The worktop appears to float. Visual weight is reduced.

20mm Advantages

Sleeker profile suits modern, handleless cabinetry
Lighter — beneficial for island overhangs and wall-mounted applications
Approximately £130 less per slab than 30mm
Gaining popularity in new-build UK kitchens

Structural Differences

Both thicknesses use the same quartz composition. Both carry the same Quartz Store 10-year warranty. The difference is purely dimensional. 20mm requires additional support for overhangs beyond 200mm, where 30mm manages 300mm without brackets. Our fitting team handles this during installation.

Our Recommendation by Kitchen Style

Shaker doors: 30mm
Handleless slab doors: 20mm
Traditional framed: 30mm
Open-plan contemporary: 20mm for worktops, 30mm for island

Browse both options in our quartz worktop collection. Not sure about your kitchen style? Use our door selector or see how it works.