How Do I Calculate Resin and Aggregate Quantities?

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Selecting the right amount of resin and aggregate is key to achieving a well-balanced, durable, and permeable stone floor in your minimalist garden. Here’s a simple guide to help you estimate material needs for your next project.

Simple Approach to Estimating Your Materials

You can calculate your required quantities with a straightforward rule of thumb: multiply your planned surface area in square metres (m²) by your desired floor thickness in centimetres (cm), then multiply that figure by 15. This gives you the approximate weight of aggregate (in kilograms) you’ll need. For example, a 10m² area at 2cm thickness: 10 × 2 × 15 = 300kg of aggregate.

Resin volume is typically around 3% of your total aggregate weight by volume. This ratio provides enough binding for strength and permeability without making the surface too stiff or impermeable.

Choosing the Right Kit or Materials

If you prefer simplicity, consider an all-in-one kit like the Flowstone Complete Permeable Floor Kit, which is sized according to surface area and includes clear dosing guidance. Alternatively, purchase individual components—such as pre-washed pebbles and suitable resin—to customise your design or to top up an existing area.

• Pick polyurethane resin for white or light stones to avoid yellowing.
• Choose epoxy resin for coloured aggregates for lasting aesthetics.
• Ensure pebbles are washed and the correct size for even binding and a smooth finish.

When Precise Calculations Matter

Precision is especially important for intricate shapes, gradients, or when budgeting for large-scale installations. Having a little extra material set aside can prevent interruptions to your workflow and help with repairs or small extensions in the future.

Related products

• "Flowstone" – Complete Permeable Floor Kit with Pebbles and Resin
• Washed Pebbles for Permeable Floors 25kg – Outdoor Resin-Bound Surfaces
• "Polirock" – Polyurethane Binder for White Stones, 2kg Two-Component Kit

Related guides

• Which Permeable Flooring Is Best For Minimalist Gardens

Estimating resin and aggregate needs ahead of time will simplify your installation and give your minimalist garden flooring the best chance of success. For more details about layouts and other surface options, see our main guide on permeable flooring for minimalist gardens.