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When planning a resin-bound courtyard, estimating the right quantities of resin and aggregate is essential for both budget and finish. Knowing how to calculate these needs ensures a stress-free installation and helps you achieve a durable result.
Step-by-Step Calculation Guide
Start by measuring your courtyard’s area in square metres (m²). Next, decide on your desired layer thickness, usually between 2–4cm for pedestrian use. To estimate the amount of aggregate, use this simple formula:
- Aggregate needed = Area (m²) × Thickness (cm) × 15kg per m² per cm
- Resin needed = Total aggregate weight × 3% (approx.)
For example, a 10m² courtyard at 3cm thickness: 10 × 3 × 15 = 450kg of aggregate. Resin required: 450kg × 0.03 = 13.5kg.
Choosing the Right Resin System
It’s important to select a binder that matches your aggregate colour and end use. For coloured pebbles and decorative finishes, a clear epoxy binder such as “Trasparente” offers reliable UV stability for lasting results. For white or very light stones, opt for a polyurethane binder like “Polirock” to resist yellowing. If you want a convenient all-in-one solution, consider a complete kit such as “Flowstone”, which includes pre-measured supplies and clear instructions.
When Careful Calculation Matters
Planning the right amounts is particularly important for larger areas and DIY projects. Too little binder can leave stones loose, while over-ordering wastes material and money. Always add a small margin to your order, and double-check thickness and area for peace of mind before purchasing.
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Accurate calculation of resin and aggregate needs not only improves the finish of your courtyard, but also helps keep your project on track. For more detailed advice on planning your courtyard installation, explore our main guide on how much resin you need for a courtyard.