Granite Setts vs Paving Slabs: Sizes, Borders, Paths & Design Ideas

A practical comparison of granite setts and granite paving slabs for patios, paths, borders and garden design.
By JJ Building Materials
6 min read

Granite setts and granite paving slabs are made from the same broad natural-stone family, but they perform very different jobs in a garden layout. Large slabs are efficient for covering a patio or seating area, while smaller setts can define borders, create paths, frame steps or introduce a contrasting pattern. Understanding those differences helps you choose the right format instead of treating setts as simply small slabs.

This UK guide compares granite paving slabs with setts, including format, layout, colour, quantities, bedding, edging and design uses. JJ Building Materials stocks both types within the same granite collection, making it possible to coordinate slabs and detail pieces across one project.

What Are Granite Paving Slabs?

Granite paving slabs are larger pieces designed to create the main walking surface. Depending on the product, they can be supplied in single dimensions or as a patio kit containing more than one format. Larger slab modules reduce the number of joints across an area and can create a cleaner, calmer visual field.

Examples in the live range include Polished Silver granite paving slabs, Sky Blue slabs, Shadow Black products and other 20mm or 25mm granite options. Always use the exact listed thickness and dimensions rather than assuming all slabs are identical.

What Are Granite Setts?

Setts are smaller block-like paving units. Their compact format creates many more joints than a slab and allows tight patterns, narrow paths and defined edges. Our current Carbon Charcoal 30mm granite setts are one example of a smaller format that can be used as a design element in a larger hard-landscaping scheme where suitable.

Do not confuse garden setts with every type of heavy-duty granite block used elsewhere. Product thickness and intended application vary, so confirm the actual specification for the project.

Granite Slabs for Main Patio Areas

For a large seating or dining area, slabs are usually the simpler way to cover square metres efficiently. The larger format creates fewer joints to prepare and fill and gives furniture a visually less fragmented background.

If the patio adjoins large doors or a contemporary extension, long slab lines can reinforce the architecture. In a traditional garden, mixed-size patio kits can soften that regularity.

Granite Setts for Borders

A border is one of the most effective uses for granite setts. A dark charcoal band around a light silver patio creates definition and can help visually separate the paving from lawn, gravel or planting. The border can be one sett wide for a subtle edge or wider where the design requires it.

Plan the width before laying the main slabs so you do not end up with narrow cuts after the border is added.

Granite Setts for Garden Paths

Small units can follow narrower paths and changes of direction more naturally than very large slabs. A sett path also has a more textured joint pattern, which can suit cottage gardens, courtyards and entrances.

For a long path, set out a centre line or edge line and decide whether the units will run lengthways, crossways or in another pattern. The direction can make a narrow path appear visually longer or wider.

Using Setts Around Steps

Setts can mark the approach to steps or form a border around a change in level, while purpose-made bullnose granite products can be used where the range and detail require them. Keep all components coordinated in height so the border does not become an unexpected lip or trip point.

Using Setts as a Feature Band

A narrow band through a slab patio can divide functional zones, such as dining and cooking areas, without building a physical barrier. Repeating the same sett colour around the perimeter can tie the scheme together.

Feature bands work best when aligned with obvious architectural references such as a door opening, wall return or path rather than placed arbitrarily.

Slab and Sett Thickness

One of the biggest practical issues when mixing formats is thickness. Setts may be thicker than slabs. That does not prevent them from being used together, but the bedding levels need to be adjusted so the finished surfaces align correctly.

Plan this before building the sub-base. A border should not be laid onto an unsuitable thin layer simply to force the tops level with adjacent slabs.

Different Bedding Requirements

Large granite slabs are normally installed on an appropriate full bedding system, with bonding treatment where required. Setts may use a different depth or method depending on their size and intended use. Follow product-specific guidance for both components.

Our granite paving installation guide explains the main patio sequence, but a contractor should adapt the detail to the actual setts and load requirements.

Joint Widths and Jointing Materials

Setts naturally create a much greater total joint area than large slabs. This makes joint width, jointing material and cleaning especially important. Choose a product suitable for the format, joint dimensions and location.

The joint colour will also be more visually dominant with small setts. A contrasting joint can make every unit stand out; a closer colour can give the border a more continuous appearance.

Granite Patio Kits vs Setts

A patio kit should not be seen as a substitute for setts. Mixed-size patio packs still use relatively large slabs intended to form the main surface. Setts are useful when you deliberately want a smaller module and more detailed pattern.

The silver granite patio kit, for example, can form the main paved field while charcoal setts provide the edge.

Colour Combinations

Silver and charcoal is a natural high-contrast combination. Blue-grey slabs can also work with charcoal borders, while a dark main patio may use a lighter surrounding material elsewhere rather than more dark setts. Review our granite paving colour guide for a deeper comparison.

Calculating Granite Slabs

For slabs, calculate the total square metres of the area that remains after any sett border or feature band is deducted. Compare this with the pack coverage and add a suitable allowance for cutting and waste.

Calculating Granite Setts

For a border, calculate the total length and multiply by the intended border width to get its area. Then compare with the product's stated coverage or unit quantity. If the product is sold by piece or crate, translate the layout into the required number of units.

Allow for cuts at corners and changes in direction. A detailed radial or curved pattern may need more cuts than a straight rectangular border.

When Slabs Are the Better Choice

  • Large patios and seating areas.
  • Projects where fewer joints are preferred.
  • Contemporary layouts using long clean lines.
  • Areas where large-format furniture will sit.
  • Projects using a patio kit or regular slab module.

When Setts Are the Better Choice

  • Borders and perimeter details.
  • Narrow garden paths.
  • Feature bands and pattern changes.
  • Small courtyards where a compact module suits the scale.
  • Contrasting detail around larger paving.

Combining Setts With Other Paving Materials

Granite setts can also form a boundary between granite and another paving material, such as limestone paving slabs or porcelain paving. This can make transitions feel deliberate. Check thickness and installation compatibility before combining materials.

Maintenance Differences

The stone itself requires suitable natural-stone care, while the greater number of joints in a sett area can mean more attention to joint cleanliness and vegetation. Use compatible cleaners and avoid damaging the jointing material with overly aggressive methods.

Browse paving maintenance products and read our granite cleaning guide before applying treatments.

Frequently Asked Questions

Are granite setts suitable for a patio?

Setts can form patio areas where the exact product and build-up are suitable, but they create many more joints than slabs. They are especially useful for borders, paths and feature details.

Can granite setts be laid next to 20mm slabs?

They can be combined if the installation is designed to accommodate their potentially different thicknesses and bedding requirements while keeping a suitable finished level.

How many granite setts do I need for a border?

Calculate the border's length and width, then compare the resulting area with the product coverage or unit dimensions. Add an allowance for corner cuts and waste.

Do granite setts need edging?

Edge restraint depends on the layout and surrounding construction. Borders and paths should be designed so the units remain laterally stable.

Which looks more modern, slabs or setts?

Large regular slabs are often associated with contemporary layouts, but setts can also look modern when used in straight, restrained borders. The overall design matters more than the format alone.

Can I use charcoal setts with silver granite slabs?

Yes. This creates a clear light-dark contrast and is a common design approach where the formats are installed compatibly.

Choose the Right Granite Format

Browse granite paving slabs and setts to compare the live range, then use our granite paving buying guide to finalise colour, slab size, patio-kit format and quantities.