When choosing the right resin surfacing system for a project, it’s essential to understand the distinct differences between resin bound and resin bonded systems. Though often confused due to similar terminology, each has its own unique properties, performance characteristics, and ideal applications.
This quick guide will help architects and specifiers determine which system is best suited to a project’s requirements, using Addagrip’s established range of high-quality, BBA-certified products as reference points.
🔍 What’s the Difference?
Resin Bound Surfacing
Resin bound is a system where natural or recycled aggregates are mixed thoroughly with a clear resin binder in a forced action mixer before being trowel-applied to the surface.
Key Characteristics:
- Smooth, seamless finish
- Fully porous (SuDS compliant) when laid on an appropriate base
- No loose stone—the aggregates are fully encapsulated in the resin
- Durable and hard-wearing, ideal for both pedestrian and vehicular use
Resin Bonded Surfacing
Resin bonded is a system where a layer of resin is applied to the base surface and clean, dry aggregate is broadcast onto it. The aggregate bonds to the resin but remains exposed on the surface.
Key Characteristics:
- Textured, slip-resistant finish
- Non-porous (not SuDS compliant)
- Loose stone effect but fixed in place
- Faster installation time than resin bound
🏗️ Where to Specify Each System
Resin Bound: Best for High-Performance, Aesthetic Projects
Ideal for:
- Driveways
- Pathways and plazas
- Public realm schemes
- Tree pits (porous systems)
- Cycleways and footbridges
Why specify?
- Seamless finish with a wide range of colour options
- Fully permeable, reducing surface water runoff
- Durable enough for regular vehicle traffic
- Smooth, accessible surface suitable for inclusive design
Resin Bonded: Best for Heritage, Anti-Slip or Cost-Sensitive Applications
Ideal for:
- Access roads
- Steep gradients
- Historic sites and listed buildings
- Light-use driveways and courtyards
Why specify?
- Provides a traditional gravel look without the mess of loose aggregate
- Fast to install
- Excellent slip resistance, particularly useful on slopes
🔧 Other Considerations
- Base Construction: Resin bound systems require a suitable porous base (such as open-graded asphalt) to retain permeability. Resin bonded systems are typically laid on non-permeable surfaces.
- SuDS Compliance: Only resin bound systems can offer true SuDS-compliant solutions, a key requirement in many planning applications.
- Maintenance Needs: Resin bound is low-maintenance and easy to clean. Resin bonded may experience more aggregate loss over time, particularly in high-wear areas.
- Installation Expertise: Both systems require skilled installers for long-lasting results. Addagrip supports all specified systems through its nationwide network of approved contractors.
🏆 Why Specify Addagrip Systems?
With over 40 years of innovation and expertise, Addagrip offers both resin bound and resin bonded systems that are:
- BBA-certified (for key resin bound systems)
- Supported by a trusted installer network
- Proven on prestigious UK projects including Kew Gardens and Constitution Hill at Buckingham Palace
We work closely with architects and specifiers to provide technical guidance, product samples, and design support throughout your project—from initial specification through to completion.
Final Thoughts
Understanding the differences between resin bound and resin bonded surfacing allows you to make informed, confident decisions when specifying for your next scheme.
For help choosing the right system, or to discuss the needs of your current project, speak to the Addagrip team today.