How Thick Is Resin Driveway

Resin driveways have become a popular choice for homeowners across the UK because of their attractive finish, durability, and low maintenance needs. They provide a smooth and modern appearance that suits both contemporary and traditional properties. One of the most common questions asked by homeowners considering this surface is how thick a resin driveway should be. The answer depends on the type of resin system being used, the base underneath, and how the driveway will be used.

Understanding Resin Driveway Systems

There are two main types of resin driveways: resin bound and resin bonded. Resin bound systems mix the aggregate stones with the resin before laying, producing a smooth and permeable finish. Resin bonded systems involve spreading resin on the surface and scattering stones over the top, which creates a textured look but is less durable and not permeable. Because of these differences, the thickness of each type varies and affects performance.

Standard Thickness for Resin Bound Driveways

Resin bound driveways usually require a thickness of around 15 to 20 millimetres. This is considered sufficient for most residential driveways that will take the weight of cars and light vans. The thickness allows for strong bonding between the resin and the aggregate, providing a surface that can last for many years without cracking or becoming loose. Where heavier vehicles are expected, some installers may recommend a slightly thicker layer to improve load-bearing capacity.

Thickness for Resin Bonded Driveways

Resin bonded driveways are typically laid at a thinner depth, often around 3 to 6 millimetres. Since the stones are scattered on top of the resin, this type does not require as much material. However, the thinner layer means resin bonded driveways do not last as long and may not cope as well with heavy vehicles. They are often better suited to paths, patios, or decorative areas rather than main driveways.

The Role of the Base

The thickness of the resin itself is only one part of the overall driveway construction. A resin surface must be laid over a suitable base to provide strength and durability. Tarmac and concrete are the most common bases, and both need to be in good condition before resin is applied. The base must be stable, smooth, and free of cracks, as resin will not cover up structural problems. For new installations, a base thickness of around 100 to 150 millimetres is often required, depending on soil conditions and expected vehicle loads.

Why Thickness Matters

The correct thickness is crucial for the performance of a resin driveway. A surface that is too thin may wear down quickly, develop bald patches, or crack under pressure. On the other hand, applying the resin too thickly can cause issues with curing, leading to an uneven finish. Installers follow guidelines set by manufacturers to ensure the resin bonds properly and provides a long-lasting surface. Choosing a qualified installer with experience in resin applications is the best way to guarantee the correct thickness is achieved.

Costs Linked to Thickness

The thickness of the resin surface also has a direct impact on cost. A resin bound driveway laid at 15 to 20 millimetres will require more material than a resin bonded option, which makes it more expensive initially. However, the longer lifespan and reduced maintenance often make resin bound systems more cost effective over time. On average, resin driveways cost between £40 and £70 per square metre depending on the type chosen, the thickness, and the complexity of the installation.

Durability and Maintenance

When installed at the correct thickness over a solid base, a resin bound driveway can last up to 20 years with proper care. The surface is resistant to weeds and moss, which reduces the need for constant cleaning. Light pressure washing and occasional sweeping are usually enough to keep it in good condition. Resin bonded driveways, being thinner, tend to have a shorter lifespan, often around 5 to 10 years, and may require more frequent attention to keep the surface looking fresh.

Suitability for Different Uses

A resin bound surface at 15 to 20 millimetres is strong enough for most homes where cars and vans are the heaviest vehicles. For commercial sites or homes with larger vehicles such as motorhomes, a slightly thicker installation and reinforced base may be recommended. Resin bonded systems, being thinner, are generally not suitable for heavy traffic areas. Homeowners should always match the thickness and type of resin driveway to the way it will be used to ensure long-term reliability.

Conclusion

So, how thick is a resin driveway? For resin bound driveways, the recommended thickness is usually 15 to 20 millimetres, while resin bonded surfaces are much thinner at 3 to 6 millimetres. The correct thickness depends not only on the resin system but also on the quality of the base and the type of traffic the driveway will handle. Getting this right ensures the driveway remains strong, safe, and attractive for many years.