A gravel driveway is one of the most accessible and cost-effective surfacing options for residential properties. It is permeable, which means it generally does not require planning permission for front driveways, and it can be laid as a DIY project with good preparation and the right materials. The quality of the preparation determines how long the gravel stays in place and how well it performs.

Planning and Preparation

Before ordering gravel, mark out the driveway area and calculate the volume of gravel needed. A typical driveway gravel depth is 50mm for pedestrian use or 75 to 100mm for vehicle traffic. Measure the length, width, and planned depth to calculate the volume in cubic metres, then convert to tonnes using the density of the gravel type chosen, typically around 1.5 to 1.8 tonnes per cubic metre.

Excavate the driveway area to the required depth below the finished surface level, allowing for the sub-base and gravel layers. For a vehicle driveway, excavate to around 200mm depth to allow for a 100mm sub-base of compacted hardcore, a weed membrane, and 75 to 100mm of gravel on top.

Edging

Installing edging around the perimeter of the driveway before laying the sub-base keeps gravel contained and prevents it from spreading onto adjacent grass or paving. Concrete edging blocks, timber edging boards, metal garden edging, and plastic edging are all options. The edging should be set at the finished gravel surface height to contain the gravel without creating a trip hazard.

Sub-Base

A compacted sub-base of hardcore, also called MOT Type 1 or DTp1 crushed stone, forms the stable foundation for the gravel surface. Lay the hardcore to a depth of around 100mm and compact it thoroughly using a plate compactor, which can be hired from most tool hire companies. A properly compacted sub-base prevents rutting and displacement under vehicle traffic.

Weed Membrane

Lay a permeable weed control membrane over the compacted sub-base before applying the gravel. The membrane suppresses weed growth from below while allowing water to drain through. Choose a heavy-duty commercial-grade membrane rather than a lightweight garden centre product; the heavier grade withstands vehicle traffic and lasts considerably longer. Overlap strips by at least 150mm and secure the edges under the edging.

Laying the Gravel

Tip or barrow the gravel onto the membrane and spread evenly to the required depth using a rake. Check levels with a spirit level or string line as you work. Compact the gravel with the plate compactor for a firmer surface, particularly for vehicle use. Top up any areas that appear thin after compaction. A slight crossfall or gradient of around one in forty directs rainwater to drainage rather than letting it pool.

Summary

A successful gravel driveway depends on thorough ground preparation, a well-compacted sub-base, a quality weed membrane, and the right type of gravel at adequate depth. Angular or self-binding gravel performs better under vehicle traffic than rounded pea gravel. Good edging keeps the gravel contained. With proper preparation, a gravel driveway is a durable and attractive surface that can be laid as a DIY project in a weekend.