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Mixing pebbles with a resin binder is the crucial step in creating a strong, permeable outdoor surface. Doing this properly ensures your flooring drains water effectively and stays looking its best.
Selecting and Preparing Your Materials
Choose clean, washed, and dried pebbles or decorative aggregates to prevent curing issues or discolouration. For white or very light stones, select a polyurethane binder such as Polirock to avoid yellowing. For coloured or natural-tone pebbles, a transparent epoxy binder is more appropriate. Kits like the Flowstone Complete Permeable Floor Kit take the guesswork out of matching materials and resin.
Mixing Ratios and Application Steps
A typical mix uses roughly 3% resin binder by weight to pebbles. Place the pebbles in a clean mixer or container, then add the pre-measured binder. Stir thoroughly until all stones are coated, avoiding dry patches and excessive pooling. Lay the mixture on your prepared substrate, spreading evenly and compacting lightly to form a uniform surface. For larger areas, working in sections will help maintain consistency.
When Mixing Technique Matters
Thorough mixing is essential to bond every pebble and prevent loose surface stones or patchy curing. Humidity and moisture can affect resin performance, so work with dry materials and avoid damp weather if possible. For best results, ensure your substrate is clean, solid, and dry before laying your mix.
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Getting your pebble and binder mix right provides the foundation for a durable, permeable outdoor floor. For more guidance and inspiration, see our full guide on how to make DIY permeable flooring for outdoor spaces.