How much binder and stone should I use per square metre?

← Back to Is Resin Bound Gravel Driveable?

Getting the right proportions of binder and aggregate is essential for creating a durable, driveable resin bound surface. Whether you’re resurfacing a driveway or installing a new path, the correct ratios ensure a stable, attractive, and long-lasting finish.

Standard ratios for resin bound installations

For most driveable resin bound gravel applications, a general guideline is to use around 3% binder by weight of the aggregate. This typically means mixing 6–8 kg of aggregate for every 1 kg of resin binder. The precise quantity may vary based on the size of the stones and the overall thickness you intend to achieve, but these ratios offer a strong starting point for most installations.

Selecting the right binder and aggregate

Not all resin binders are the same. For coloured stones or darker aggregates, products like the “Trasparente” epoxy binder offer good UV stability and provide a clear finish. If you are working with white stones, a non-yellowing polyurethane such as “Polirock” is recommended to maintain clarity and prevent discolouration. Adjust your aggregate amount by considering granule size and desired surface appearance—thicker layers will require more material.

When this matters: Stability and longevity

Using the appropriate binder-to-stone ratio isn’t just about strength—it’s also about drainage and surface safety. Too little binder can cause loose stones, while too much may affect permeability. If you’re aiming for a driveable surface that copes with UK weather and regular car traffic, choose a complete system like the Flowstone kit, which is sized for area and guides you on correct mixing for an optimal result.

Related guides

Is Resin Bound Gravel Driveable

Choosing the correct binder and stone mix is key to a resilient resin bound gravel surface, especially when driveability matters. For more on driveable resin bound surfaces, visit our main guide on Is Resin Bound Gravel Driveable?.