How to Calculate Quantity for Stone Binder Projects

Simple Calculation Steps

Begin by measuring the area you want to cover (in square metres) and decide the intended thickness of your stone layer (in centimetres). To estimate the amount of aggregate (stones) required:

• Stones (kg) = 15 × Area (m²) × Thickness (cm)

Once you know the aggregate quantity, calculate the resin needed. A typical ratio for stone binder projects is about 3% resin by aggregate weight. For example, if your project requires 100 kg of stones, you will need approximately 3 kg of resin.

Using Manufacturer Guidance

Always review the product guidance provided for your chosen binder, as resin requirements may vary based on aggregate size and product type. For example, Polirock recommends 6–8 kg aggregate per 1 kg binder, depending on your chosen finish and application thickness. Checking these specifics ensures optimal results and durable surfaces.

Practical Tips for Buying and Mixing

It’s a good idea to purchase a little more resin and aggregate than calculated to account for on-site adjustments and edges. Mix thoroughly following manufacturer instructions to ensure even coverage and binding—all stones should be well coated before laying. For decorative coloured finishes, consider a UV-stable binder like Trasparente.