Choosing Aggregates for Decorative Permeable Paving

← Back to How do you build decorative permeable paving?

Aggregate Selection for Decorative Permeable Paving

Choosing the right aggregate is key to achieving a strong, attractive, and truly permeable decorative pavement. From stone type to size and colour, understanding your choices helps you create a resilient surface tailored to your project’s needs.

Key Considerations for Aggregate Selection

When building decorative permeable paving, focus on aggregates that support both water drainage and durability. Natural pebbles or gravels are preferred for their rounded shapes and compatibility with permeable resin-bound systems. A typical granule size for outdoor resin-bound surfaces ranges between 4 and 8 mm, allowing water to pass through efficiently while providing a comfortable walking surface.

Colours are also important. Lighter aggregates such as white stones require specialised non-yellowing polyurethane binders, while warm and darker stones pair well with UV-stable epoxy binders. The Washed Pebbles for Permeable Floors offer a ready-to-use, pre-washed option suitable for a variety of designs.

Practical Tips for Selection and Installation

Before purchasing, plan your design and surface area. Estimate the amount of aggregate by multiplying the intended area (in m²) by the chosen thickness (typically 2–3 cm). For most binders, you’ll want approximately 6–8 kg of stone per kg of binder, but check specific product recommendations.

For white stones: Use a non-yellowing polyurethane binder such as Polirock, which maintains clarity and prevents discolouration.
For coloured or dark aggregates: Choose a low-yellowing, UV-stable epoxy binder for long-lasting vibrancy.
Ensure all aggregates are dry and dust-free before mixing with resin for best results and even curing.

When This Matters

Proper aggregate selection is particularly crucial for high-traffic areas or places exposed to fluctuating weather conditions, such as driveways, patios, and public pathways. The right blend of aggregate and binder safeguards both water permeability and surface integrity, extending the lifespan and visual appeal of your paving.

Related guides

How Do You Build Decorative Permeable Paving

Thoughtful aggregate selection creates a resilient, visually striking, and functional permeable surface. For a step-by-step guide to creating decorative permeable paving from preparation to installation, explore our main resource: How do you build decorative permeable paving?