Choosing Stone Aggregate for Permeable Floors

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Choosing the right stone aggregate is key to ensuring your permeable flooring drains efficiently and lasts in the UK climate. Here’s what you need to know about selecting, applying, and caring for these materials in outdoor spaces.

What Makes a Stone Aggregate Suitable?

For permeable floors, the aggregate needs to allow water to pass freely, reducing puddling and runoff. Look for pre-washed, naturally rounded stones—mostly between 6 and 12mm—such as those found in washed pebbles for permeable floors. Their size and shape promote proper water movement and help create a stable, attractive finish when used with a suitable resin binder.

Pre-washed stones reduce dirt and blocking issues.
Consistent sizing prevents compaction and maintains permeability.
Natural colours and textures can be customised for design preferences.

Practical Advice for Installation

Before applying the aggregate and resin, ensure your sub-base is level and stable. Most installations use a mix of stones and a compatible resin—polyurethane for light shades, or low-yellowing epoxy for coloured stones—to help retain the floor’s appearance over time. Kits like the Flowstone Complete Permeable Floor Kit include step-by-step instructions and guidance on resin choice, making the process approachable even for DIY projects.

When This Matters

Selecting the correct stone aggregate matters most in driveways, patios, and public paths where efficient drainage is needed. Using the right materials helps prevent water pooling and surface damage, and supports sustainable landscaping by reducing runoff.

Related guides

Which Stone Should I Use For Permeable Flooring

Understanding stone aggregate selection is an essential step for any permeable flooring project. For further advice on materials and installation tips, explore the main guide on which stone to use for permeable flooring.