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Planning to install a 50m² Flowstone permeable floor? Estimating the right amount of resin binder is essential for achieving a long-lasting, fully-draining surface. Here’s a practical guide for getting your calculations—and your kit—right.
How Much Resin Do You Need?
For a Flowstone system at 2.5cm thickness, covering 50 square metres typically requires between 200 and 250 litres of resin binder. This calculation assumes proper mixing with suitable aggregates, ensuring optimal bonding and permeability. Always round slightly up to account for surface unevenness and edge wastage, particularly on large driveways or patios.


Choosing and Using the Right Resin
When selecting your resin, consider the aggregate colour: white stones benefit from a non-yellowing polyurethane, while tinted or natural pebbles work well with a low-yellowing epoxy such as the “Trasparente” Epoxy Binder. Always mix the resin thoroughly with the stones before laying to ensure stability and a seamless, joint-free surface. Step-by-step instructions are included with the Flowstone kit, making the process accessible even for those new to resin flooring.
When Accurate Resin Quantity Matters
- Large installations: Mistakes in estimating can lead to costly material shortfalls or surplus.
- Ensuring proper drainage: The right mix delivers water permeability and prevents puddling.
- Professional finish: Adequate coverage supports a durable, attractive result that handles traffic and weather.

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Related guides
Planning your resin quantities carefully makes all the difference for a successful Flowstone installation. For more details on resin calculations and surface preparation, visit our main guide on resin coverage for 50 square metres.
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