Granite Setts and Cobbles

Natural stone kerbs used for driveway block paving typically include granite kerbs, sandstone kerbs such as sandy storm, and limestone kerbs.

Granite kerbs are available in both cropped (hand-split) and sawn (machine-cut) finishes. Cropped granite offers a more traditional, natural appearance, while sawn granite provides a clean and modern look with consistent dimensions.

Sandstone kerbs are often chosen for their warmer tones and traditional character, while limestone kerbs offer a more uniform and contemporary appearance. All options can be used as edge restraints, although granite generally provides the highest level of durability.

Cropped granite kerbs are produced using a splitting process, resulting in naturally irregular edges and a more traditional, rustic appearance. They are often used in heritage-style or countryside driveway projects.

Sawn granite kerbs are machine-cut with precise dimensions and straight edges, creating a cleaner and more uniform finish suitable for modern driveway designs.

In terms of performance, both are made from granite and offer similar strength and durability. The main difference lies in appearance and dimensional consistency rather than structural properties.

Granite kerbs are generally considered the most durable option for driveway use. Due to their high density, low water absorption and excellent compressive strength, they perform very well under vehicle traffic and in freeze-thaw conditions.

Sandstone and limestone kerbs can also be used in residential settings, particularly where aesthetics are a priority. However, they are typically less resistant to long-term wear compared to granite, especially in high-traffic areas.

For driveways requiring maximum longevity and structural stability, granite remains the preferred choice.

Common sizes for natural stone kerbs used in driveway block paving include 200 x 100 x 50, 200 x 100 x 100, and larger formats such as 300 x 150 x 100, depending on the project requirements.

Thinner kerbs are generally used for lighter applications, while thicker units are preferred for driveway edging where greater structural support is required.

Cropped granite kerbs may show slight dimensional variation due to the splitting process, whereas sawn granite, sandstone and limestone kerbs are typically more uniform and easier to align during installation.

Natural stone kerbs are generally low maintenance. Granite kerbs do not usually require sealing due to their dense structure and low absorption rate.

Sandstone and limestone kerbs may benefit from sealing in some cases to help reduce staining or weathering, particularly in driveway environments.

In most installations, routine cleaning and proper installation are sufficient to maintain long-term performance.

The long-term performance of natural stone kerbs depends heavily on correct installation rather than the material alone.

A solid and well-compacted sub-base, typically using MOT Type 1 or similar material, is essential to provide structural support. Kerbs should be bedded and backed with concrete to prevent movement under vehicle load.

As edge restraints, kerbs play a key role in allowing block paving to interlock and support itself. When the sub-base is properly compacted, the kerbs are securely fixed, and the paving is tightly laid, the entire system works together to deliver long-lasting driveway performance.