Understanding the Science Behind Permeable Resin Paving

Jim Robinson • September 19, 2022

Permeable paving solutions are a fantastic and sustainable solution for any municipality’s paving needs, but not many people fully understand how permeable resin paving works and the benefits it can provide to an urban environment. To help you understand how these materials can benefit your city or town, continue reading this guide to better understand the science behind permeable resin paving.

Resin Bound Aggregate

Resin-bound paving features a smooth surface and is made from a blend of aggregates] that have been coated with a clear polyurethane resin. Polyurethane resin is more commonly used in wood or floor coatings or as a sealer to improve water and chemical resistance. It also helps the material become tougher and more resistant to wear and tear. The same is applied to the aggregate to ensure it remains in good condition as it endures the weather.

To ensure the resin fully coats the aggregate, the two are combined through a force-action mix that forms a cold-pour mixture. This makes the paving process much easier, as it can then be simply poured out into the desired areas. After being poured, the aggregate is hand-troweled to form a smooth and consistently colored surface.

Permeable Pavers

Resin-bound permeable pavers are blocks that aren’t permeable themselves but are constructed to provide enough space that water can flow between the blocks. This allows the surface to easily drain rainwater while maintaining a pleasing and luxurious appearance that aggregate would not be able to provide. Underneath the pavers is a reservoir that collects the water and safely returns it to the soil.

Reducing Pollutants

There are two major elements to understanding the science behind permeable resin paving and how it benefits the environment. First, permeable pavement is made from recycled materials to create more sustainable practices. Second, by allowing excess water to drain anywhere on the pavement rather than being directed toward a runoff or drain, the water doesn’t pick up pollutants on the street that could harm the environment. Instead, the water is safely restored to the soil and nurtures a healthier environment even in urban landscapes.

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Resin Bound Tree Pit Surrounds

By Jim Robinson • September 9, 2025

Resin Bound Tree Pits: The Smarter Way to Protect and Showcase Urban Trees In towns and cities everywhere, urban planners face the same challenge: how to protect tree roots while keeping public spaces clean, attractive, and safe. Traditional solutions—like loose gravel, soil, or metal grilles—often fall short. That’s where resin bound tree pits come in. What is a Resin Bound Tree Pit? A resin bound tree pit is a surfacing system that uses a blend of natural stone aggregates bound together with a clear, UV tolerant resin. Installed around the base of a tree, it creates a strong, permeable, and decorative surface that allows rainwater to drain through while protecting the soil and roots below. Think of it as a breathable shield for urban trees: tough enough to withstand foot traffic, but porous enough to support healthy root growth. Why Choose Resin Bound for Tree Pits? Permeability for Healthy Trees The resin bound surface is fully porous, meaning water and air can still reach the roots. This promotes long-term tree health and reduces the risk of waterlogging. Cleaner, Safer Surfaces Unlike loose gravel, resin bound surfaces don’t scatter, sink, or create trip hazards. In fact they help to eliminate trip hazards! They provide a smooth, stable finish—ideal for high-footfall areas. Aesthetic Appeal With a wide choice of natural stone colors, resin bound tree pits can complement surrounding paving, creating a polished, modern look in public spaces. Durability & Low Maintenance Resin bound surfacing is resistant to weeds, litter build-up, and erosion. It keeps the area around tree bases tidy without constant upkeep. Accessibility Friendly A smooth surface around tree pits is easier to navigate for strollers, wheelchairs, and pedestrians—making public spaces more inclusive. Where Are Resin Bound Tree Pits Used? City sidewalks to reduce tripping hazards and improve walkability Parks and plazas for cleaner, more attractive landscapes Shopping districts where appearance and safety matter Corporate campuses or schools to combine functionality with visual appeal A Sustainable Choice for Urban Environments! Resin bound systems align with modern sustainability goals. By ensuring stormwater naturally drains into the ground, they help prevent flooding and reduce strain on drainage systems. Combined with their long service life, a very competitive price point, they’re a future-proof investment for greener, smarter cities. Final Thoughts If you are considering the use of resin bound for your tree pits, don't just choose any resin bound product, choose one that is time tested, data driven and will sustain the demands of a harsh city environment. A good resin bound product will have similar strengths to concrete yet it will be completely pervious. Resin bound tree pits are more than just a neat landscaping detail—they’re a practical solution that supports tree health, improves safety, and enhances the look of urban spaces. If you’re planning a streetscape project, commercial landscape, or public park, resin bound surfacing could be the perfect choice for both form and function.