Block Paving Stones FAQ: Expert Answers for UK Driveways

In UK landscaping, “setts” usually means small rectangular or square paving blocks, often granite, sandstone or limestone. “Cobbles” is often used more loosely for smaller natural stone paving pieces with a rustic or rounded appearance. “Block paving” describes the finished paving system. In practice, many customers use cobbles, setts and block paving to describe similar small-format driveway or path materials.

The main materials are granite setts, sandstone cobbles and limestone cobbles. Granite is the hardest and most durable option, especially for driveways. Sandstone gives a warmer, more traditional garden character. Limestone offers a refined, smoother appearance with muted colours. The best choice depends on vehicle use, design style, budget and the finish required.

Yes, granite setts are one of the strongest natural stone choices for driveways. Granite is dense, hard-wearing and highly resistant to regular vehicle traffic when installed correctly. For domestic driveways, 50 mm thick granite setts are commonly used, provided there is a suitable MOT Type 1 sub-base, full mortar bedding, strong edge restraint and correct jointing.

Sawn granite setts have machine-cut sides and a neater, more regular shape. They suit modern driveways, straight lines and cleaner layouts. Cropped granite setts are split or cropped, giving a rougher and more traditional appearance. They suit older properties, rustic paths and heritage-style paving. Both can perform well, but the visual effect and installation tolerance are different.

Tumbled granite setts are granite blocks that have been processed to soften sharp edges and create an aged appearance. They are useful where customers want the strength of granite but not a very sharp or newly cut look. Tumbled granite works well for traditional driveways, cottage-style gardens, courtyards and edging details.

Sandstone cobbles can be used for domestic driveways if the stone is suitable, thick enough and correctly installed. They are generally less dense than granite, so installation quality matters. A strong sub-base, full mortar bed, proper jointing and good drainage are important. For heavier vehicle use, granite setts are usually the safer long-term choice.

Kandla Grey sandstone cobbles are small-format Indian sandstone paving units with cool grey and occasional blue-grey tones. They are popular for paths, edging, patios and traditional driveways where a natural stone look is preferred. Because sandstone has natural variation, the cobbles should be blended from different crates or layers before laying.

Raj Green sandstone cobbles are Indian sandstone setts with a traditional mix of green, grey, brown, buff and olive tones. They suit cottage gardens, older properties, rustic paths and warmer driveway designs. Raj Green is not a plain green stone; its appeal comes from natural mixed colour and a softer traditional appearance.

Tumbled sandstone cobbles have softened edges and a more aged surface character. The tumbling process reduces sharpness and makes the cobbles look more settled from the start. They are often used for traditional gardens, paths, borders, courtyards and heritage-style paving where a newly cut appearance would look too harsh.

Good quality limestone cobbles can be suitable for residential driveways when correctly installed. Limestone is usually denser and more consistent than sandstone, though granite remains the strongest option overall. For driveways, use suitable thickness, a compacted sub-base, full mortar bedding, correct jointing and secure edge restraints.

Black Limestone cobbles are dark natural limestone setts used for paths, borders, patios and driveways. They give a clean, strong visual contrast and work well in both traditional and modern designs. Like most dark natural stone, the colour can soften over time outdoors, especially with weathering and cleaning.

Tandur Grey limestone cobbles are grey natural limestone setts with a calm, understated appearance. They are often used for paths, driveways, edging and courtyard paving. Their softer grey colour works well with brick, render, planting and natural stone walling.

Tandur Yellow limestone cobbles are warm-toned limestone setts with yellow, beige and earthy colour movement. They suit rustic, traditional and countryside-style gardens. They can be used for paths, edging and suitable driveway applications, provided the installation is designed for the expected load.

Granite is usually best for strength and heavy driveway use. Sandstone is best for a traditional, warmer and more varied garden character. Limestone sits between the two, offering a refined appearance and good durability for many domestic projects. The best material depends on load, appearance, maintenance expectations and budget.

Common sizes include 100 x 100 mm and 200 x 100 mm. The 100 x 100 mm size gives a classic cobbled appearance and works well for curves and detailed layouts. The 200 x 100 mm size gives a more structured block paving look and can be quicker to lay in straight runs.

For many domestic driveways, 50 mm thick natural stone setts can be suitable when installed correctly. The base and bedding are just as important as the stone thickness. For heavier traffic, commercial areas or uncertain ground conditions, thicker setts such as 80 mm or 100 mm may be more appropriate.

30 mm setts are generally better for edging, borders, decorative strips and pedestrian areas. They are usually not the first choice for vehicle driveways unless the installation system has been specifically designed and approved for that use. For normal domestic driveways, 50 mm or thicker is usually more sensible.

A compacted MOT Type 1 sub-base is normally used. For pedestrian paths, a lighter build-up may be enough, but driveways need a stronger foundation. Many domestic driveways use around 150 mm or more of well-compacted sub-base, depending on ground conditions and expected vehicle load.

Yes, for natural stone setts and cobbles, a full mortar bed is normally recommended. Spot bedding should be avoided because it can leave voids under the stone, causing movement, rocking, trapped water and possible freeze-thaw problems. A full bed gives better support and long-term stability.

Sawn granite setts often benefit from slurry primer on the underside because granite is dense and less absorbent than sandstone. Primer helps improve bond strength between the stone and mortar bed. For cropped or rougher granite, the need may vary, but primer is still a sensible choice for stronger bedding performance.

Joint width depends on the stone finish and laying style. Sawn setts can usually be laid with more consistent joints, while cropped or tumbled cobbles need wider joints to allow for size variation. As a practical guide, many natural stone sett installations use joints around 8-15 mm.

Jointing options include wet mortar, suitable exterior jointing compounds and resin-based systems, depending on the project. Driveways need strong, load-resistant jointing because the joints help lock the setts together. Loose or weak joints can lead to movement, water ingress and long-term maintenance problems.

Edge restraints stop the paving from spreading under load. This is especially important for driveways, turning areas and paths with open sides. Without firm edge restraint, small paving units can move over time, even if the surface initially looks stable. Kerbs, concrete haunching or fixed edging can be used depending on the design.

Yes, drainage is important. Driveways and paved areas should be laid with suitable falls so water does not sit on the surface or become trapped below the paving. Poor drainage can cause algae, staining, frost damage, joint failure and movement. For front driveways, UK drainage and SuDS rules should also be considered.

Granite usually does not need sealing because it is dense and low-maintenance. Sandstone may benefit from breathable sealing in high-risk areas such as shaded paths, under trees or near BBQ zones. Limestone does not always require sealing, but some customers seal it for colour enhancement or stain resistance. Always use a suitable breathable exterior stone sealer.

Regular sweeping is the first step. Leaves, soil and organic dirt should be removed before they break down and stain the surface. For deeper cleaning, use water and a suitable stone-safe cleaner. Avoid harsh acids, strong bleach and aggressive pressure washing, especially on sandstone and limestone.

Yes. Natural stone changes gradually outdoors. Sandstone can mellow and show stronger wet/dry colour differences. Limestone may soften in tone and develop a natural patina. Granite is more colour-stable but can still darken when wet. This ageing is normal and should be expected, not treated as a defect.

With correct installation, natural stone block paving can last for decades. Granite setts can often last 50 years or more. Good sandstone and limestone cobbles can also give long service life in domestic settings, commonly 30-50 years, depending on stone quality, installation, drainage, jointing and maintenance.

Yes. Sawn granite setts suit modern homes, clean lines and contemporary driveways. Cropped or tumbled granite works better for traditional and heritage settings. Sandstone cobbles suit cottage gardens and warmer rustic designs. Limestone cobbles offer a calmer, refined look for both classic and modern outdoor spaces.