How to Lay Granite Setts for a Driveway — The Complete UK Guide

There's something satisfying about a well-laid granite sett driveway. It looks expensive, it ages beautifully, and done right, it'll outlast almost anything else you could put down. The problem is, most of the advice out there either glosses over the details or assumes you already know half the process. This guide doesn't do that.

Whether you're a confident DIYer or you want to brief a contractor properly, here's everything you need to know about laying granite setts for a driveway in the UK — from groundworks to final jointing.

What Are Granite Setts?

Granite setts (sometimes spelled "sets") are small, cuboid blocks of natural granite used for paving driveways, pathways, and garden edging. They're distinct from cobblestones, which are rounder and more irregular. Setts have a more uniform, architectural look — think classic European streets crossed with a modern British garden.

You can browse our full range of granite paving and setts to get a feel for what's available, including tumbled finishes, flame-textured surfaces, and different colour options.

Tools and Materials You'll Need

Before you start, make sure you have:

• Granite setts (allow 10–15% wastage for cuts)
• Sharp sand or grit sand (for bedding)
• Cement (if using mortar bed)
• Compacted MOT Type 1 sub-base
• Kiln-dried sand or polymeric jointing compound
• Rubber mallet
• Spirit level
• String lines
• Plate compactor
• Angle grinder or diamond blade wet saw
• Safety goggles and gloves

Step 1: Plan Your Layout and Calculate Quantities

Measure the driveway area carefully. Granite setts are typically sold by the square metre, so you'll want your dimensions accurate. When planning the pattern — whether it's a fan, herringbone, or straight run — sketch it out first. This affects how many cuts you'll need and how much wastage to factor in.

For help with sizing and coverage, our size and thickness guide is a useful starting point.

Step 2: Excavate and Prepare the Sub-Base

This is where most driveway projects either succeed or fail. Skimping on the base preparation leads to sinking, cracking, and an uneven finish within a few years.

For a typical domestic car driveway, you'll need to excavate to a depth of around 200–250mm below your finished level. Break this down as follows:

• 150mm compacted MOT Type 1 hardcore
• 30–50mm sharp sand or mortar bed
• Depth of the sett itself (usually 50mm–100mm depending on the type you choose)

Compact the sub-base thoroughly using a plate compactor. Go over it at least twice, checking for low spots with a spirit level or a long straight edge.

Step 3: Lay Your Edge Restraints

Before you lay a single sett, install your edge restraints. This could be a concrete haunch, steel edging, or a row of setts laid in a full mortar bed around the perimeter. Without this, your setts will gradually migrate outward and the whole surface will become uneven.

Visit our driveway paving collection if you're also considering edging products to complement your setts.

Step 4: Prepare the Bedding Layer

You have two options here: a dry mortar mix (4:1 sharp sand to cement, dry) or a wet mortar bed. For driveways that will take regular vehicle traffic, a semi-dry mortar bed is generally recommended. This provides better adhesion than dry sand alone and helps lock the setts in place.

Spread the bedding layer to a consistent depth — aim for around 30–40mm — and screed it level before you start placing setts.

Step 5: Lay the Granite Setts

Start from a fixed edge or reference line. Place each sett firmly onto the bedding layer and tap it down with a rubber mallet. Use a string line or straight edge to keep your rows straight and consistent.

Leave a joint gap of approximately 3–5mm between setts. This will be filled later with your jointing compound. Don't be tempted to butt them up tight — the gap is necessary for flexibility and drainage.

For curved or fan patterns, you'll need to cut setts to fit at the edges. An angle grinder with a diamond blade works for occasional cuts, but if you're doing a lot, a wet saw is much cleaner and safer.

Check your levels constantly. It's far easier to adjust now than once the mortar has set.

Step 6: Compact the Setts

Once a section is laid, run the plate compactor over it with a rubber protective mat between the plate and the setts. This beds the setts firmly into the mortar or sand base and ensures a level, uniform surface. Recheck levels after compaction.

Step 7: Jointing

This is the final step, and it matters more than most people realise. Poor jointing is one of the most common reasons granite sett driveways deteriorate faster than expected.

Options include:

• Kiln-dried sand — cheapest option, suitable for lightly trafficked areas
• Polymeric jointing sand — hardens when wet, much more durable, highly recommended for driveways
• Wet mortar — very strong but can crack over time if the base moves slightly; less forgiving than polymeric sand

Brush the jointing material into the gaps, compact it down, then repeat until all gaps are fully filled. For polymeric sand, lightly spray with water to activate. Remove any excess from the sett faces before it hardens.

Step 8: Cure and Clean

Leave the surface undisturbed for at least 24–48 hours. Avoid driving or walking heavily on it during this period. Once cured, brush off any residue and your driveway should be ready to use.

For ongoing care, check our maintenance guide — granite setts are very low maintenance, but occasional re-sanding and weed prevention treatment will keep them looking their best for decades.

A Note on Drainage

Granite sett driveways can be laid permeable (with wider sand joints) or impermeable (with tight mortar joints). If your driveway is over 5m² and you're not going permeable, you may need planning permission under UK Sustainable Drainage System (SuDS) rules. Read our drainage guide for more on this important topic.

Final Thoughts

Laying granite setts is a project that rewards careful preparation. Get the sub-base right, use good quality bedding material, and don't rush the jointing. Done properly, a granite sett driveway will look better with age and genuinely add value to your property.

If you're ready to order or just want to compare options, head to our cobblestones collection or our full driveway paving range. We deliver across the UK, and our team is always happy to help with quantities and advice.