How Much Resin for 55m² of Aggregate Surface?

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How much resin do I need for 55m² with aggregates?

If you’re planning a resin-bound or resin-bonded aggregate installation covering 55 square metres, working out how much resin you need is crucial for both results and budgeting. Let’s break down the calculation and considerations, so your finished surface is durable and long-lasting.

How to Calculate Resin Quantity for 55m²

A commonly used guideline is to mix approximately 3% resin by weight with your aggregate. To determine the required resin, first estimate the total weight of aggregate needed for your chosen application thickness (e.g., 15–18mm for driveways). For example, a 16mm thick surface would use roughly 80–85kg of aggregate per square metre. For 55m²:

Aggregate needed ≈ 4,400–4,675kg
Resin required = Aggregate weight × 0.03 (3%)
Result: Around 132–140kg of resin for 55m²

Always round up slightly to account for waste and ensure full coverage, especially on larger projects.

Choosing the Right Resin for Aggregates

The best resin can depend on your aggregate colour and site. For white stones, use a specialised non-yellowing polyurethane such as Polirock to maintain brightness and clarity. For coloured or darker aggregates, opt for a low-yellowing epoxy like the Trasparente Epoxy Binder. Each of these is formulated to provide both strength and weather resistance for outdoor surfaces.

Buying and Mixing Guidance

When purchasing resin, kits such as Flowstone bundle the correct quantity of resin with matching aggregates, sized for your surface area. Always mix resin and stones together before application to guarantee proper bonding and surface stability. Avoid pouring the binder directly onto laid stones, as this can lead to poor encapsulation and surface failure.

When Getting Resin Quantities Right Matters

Undershooting on resin may cause loose stones or patchy finishes, while using too much can saturate the aggregate, affect permeability, or increase costs. Measuring carefully ensures an attractive, robust surface that stands up to use and weather.

Related guides

Knowing the recommended ratio and how to calculate your resin needs keeps installation simple and efficient. For more guidance on large-area resin applications, visit our dedicated resource on calculating resin for 55m².