All you need to know about specifying resin bound paving

Thinking about specifying resin bound paving in your project? Find out all you need to know for different types of installations in our guide.
Resin Bound Gardens

As you know, the rural landscape is changing with the need for more and more housing, but with this comes an increase in the risk of home flooding.

With flooding often triggered by a surge in water levels from surface water run-off and overloaded drainage systems, England, Wales, and Scotland have put measures in place to ensure the environmental impact of new developments is kept to a minimum.

One of these measures is to ensure new developments use SuDS-compliant paving systems, which allow water to permeate the ground, replicating the natural environment.

There are many SuDS-compliant paving systems, but in recent years resin bound has quickly become the surfacing of choice. Yes, for its permeable qualities, but also because of its hard-wearing, low maintenance, and long-lasting features … which means it continues to look great for years to come.

On top of these qualities, resin bound paving also maintains the same slip resistance as tarmac and unlike tarmac, it won’t soften in elevated temperatures.

The maintenance of resin bound paving and keeping it looking great is also effortless. A resin bound surface is easily jet-washed without causing any damage and moss, mold, mildew prevention or weed killers have zero effect on the surface.

These assets have influenced many architects, landscape designers, and civil engineers to specify resin bound within their drawings, cementing it as the fastest-growing surfacing application in the last five years.

Typical surfacing applications include:

  • Driveways
  • Commercial / pedestrianised areas
  • Footpaths
  • Cycle lanes
  • Car parks
  • Patios
  • Tree pits.

So how do you go about specifying resin bound paving?

Firstly, you need to understand the surface area application; is it solely pedestrian footfall or trafficked areas? Is the intended application for footpaths, patios, or driveways of a residential housing development? Do you know if there are trees or shrubs within the surface area? Is it planned as part of the road demarcation for cycle lanes … etc?

Once you understand the function of the surface area, you can start to create a specification for your project. However, regardless of base construction, the maximum recommended weight limit for resin bound paving is 7.5 tonnes with a 15 – 22 mm installation thickness.

To prepare resin bound paving for all pedestrian and vehicle use, a 1 – 3 mm and 2 – 5 mm of natural washed and dried aggregate blend is used in a ratio of 50:50 or 75:25 dependent on colour.

To ensure it complies with SuDS, the recommended base build-up should be permeable, so either type1/mot or open textured binder course tarmac. If your installation is on a no-dig site, then type1/mot subbase is safest, and the resin bound installation can be installed at a greater thickness to alleviate the need to install an open textured binder course tarmac.

Finally, if your surface area contains tree collars, organic tree trunks, and watering systems, then a resin bound tree pit should be specified. These are installed using 100% 6 – 10 mm aggregate at a minimum thickness of 40 mm, which can go to 100 mm dependent on requirements.

The bigger stones allow for larger air and water recesses and are designed to break with root movement to preserve the root ball from damaging or killing the tree. This type of installation is cheaper than traditional iron grilles, easier to clean, and blends more with the natural environment.

Ideal specifications for resin bound gravel installation

  • Driveways
    18 mm – 20 mm thickness
  • Commercial / pedestrianised areas
    22mm thickness
  • Footpaths
    15 mm thickness
  • Cycle lanes
    20 mm thickness
  • Car parks
    22 mm thickness
  • Patios and landscaped gardens
    15mm thickness
  • Tree pits
    40 mm thickness

To specify Decra®Set resin bound paving in your project, download our specification sheet or find us on NBS Source, where you can easily select our product and add it to your project.

For more information or technical support request a free site survey, call or email the office at 01858 881111 or

For colour options, check out our resin bound samples.

About HMS

HMS has more than 25 years’ unrivalled trading history in providing high quality resin based surfacing treatments for Highways England, Main Contractors, Local Authorities, National Home Builders and private individuals.

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