Are Resin Driveways Permeable

When planning a new driveway, one of the most common questions homeowners ask is whether resin driveways are permeable. With increasing attention on sustainable drainage and planning restrictions in the UK, this is not just a matter of convenience but also of compliance. A driveway is more than a place to park a car, it is part of the home’s drainage system and plays a role in how surface water is managed. Understanding the permeability of resin driveways is essential before you commit to installation.

What Permeable Means in Driveways

Permeability in this context refers to the ability of a driveway surface to allow water to drain through it rather than run off into the street or local drains. This is important because impermeable driveways can contribute to flooding and put extra strain on drainage systems. UK planning rules state that if you are paving a front garden with a non permeable material and the surface is more than five square metres, you may need planning permission unless the water drains into a permeable area like a garden border or soakaway. Choosing a permeable surface can therefore save time, money, and hassle.

Resin Bound versus Resin Bonded Driveways

The key point to understand is that not all resin driveways are the same. Resin bound driveways are permeable because the aggregate stones are mixed fully with the resin and laid to create small gaps between the stones. These gaps allow rainwater to drain through into the sub base below. Resin bonded driveways, on the other hand, are different. In this method, resin is applied to the base surface and loose aggregate is scattered on top. The stones stick to the resin but the surface is effectively sealed, meaning water cannot drain through. Only resin bound driveways are considered permeable and suitable where drainage regulations apply.

Why Permeability Matters

A permeable resin bound driveway helps to manage surface water sustainably. Instead of water running straight off into public drains, it filters through the driveway surface and disperses into the ground. This reduces the risk of flash flooding, lowers pressure on local drainage networks, and helps to keep your property compliant with sustainable urban drainage principles. In areas prone to heavy rainfall, a permeable driveway can make a significant difference to how well your property handles excess water.

Installation and Sub Base Considerations

The permeability of a resin bound driveway depends not only on the surface layer but also on the preparation of the sub base. Typically, a porous sub base such as open grade tarmac or MOT Type 3 aggregate is required to allow water to pass through freely. If the resin bound layer is laid on an impermeable sub base, such as solid concrete, water will not be able to drain effectively and the driveway will no longer function as a permeable system. For this reason, it is essential to check that your installer uses the correct sub base to ensure the driveway complies with drainage requirements.

Maintenance of a Permeable Resin Driveway

To keep a resin bound driveway permeable, it must be properly maintained. Over time, debris, silt, moss, or leaves can clog the tiny gaps between the stones, reducing how effectively water drains through. Regular sweeping and occasional power washing helps to keep the surface clear. Most installers recommend cleaning once or twice a year to ensure the driveway retains its permeability. If the surface is neglected, water pooling may occur, which defeats the purpose of choosing a permeable material.

Planning Permission and Regulations

In the UK, planning rules for driveways are closely linked to permeability. Since 2008, paving over a front garden with more than five square metres of impermeable surface requires planning permission unless drainage is provided to a permeable area. Choosing a resin bound driveway that is properly installed with a porous sub base usually avoids the need for permission. Resin bonded driveways, being impermeable, may require additional drainage measures or planning approval. Your local council or planning authority can provide guidance, but many homeowners opt for resin bound to ensure compliance without the extra paperwork.

Costs and Value

Resin bound driveways are often slightly more expensive than resin bonded surfaces, partly due to the preparation required for the sub base. Prices can range from around £50 to £80 per square metre, depending on the size of the driveway and the complexity of installation. While this can be more than block paving or tarmac, the long term value lies in durability, low maintenance, and compliance with modern drainage standards. For many homeowners, avoiding planning permission and future drainage issues offsets the higher upfront cost.

Environmental Benefits

Permeable resin bound driveways also offer environmental advantages. By allowing rainwater to soak into the ground rather than rushing into drains, they help replenish natural groundwater levels and reduce the risk of localised flooding. Some systems can even be installed with additional features such as tree pits or soakaways to further enhance sustainable drainage. For homeowners who want a driveway that combines modern appearance with environmental responsibility, resin bound is a strong option.

Common Misunderstandings

A common misunderstanding is that all resin driveways are permeable. This is not the case, and confusion between resin bound and resin bonded installations often leads to problems. Another misconception is that permeability is guaranteed regardless of the base. As explained, the choice of sub base is just as important as the resin surface. Checking the method of installation and the materials used will give you confidence that your driveway will perform as expected.

Conclusion

So, are resin driveways permeable? The answer is yes, but only if you choose a resin bound system installed on a porous sub base. This option provides an attractive, durable, and regulation friendly solution that helps to manage surface water effectively. Resin bonded driveways, while cheaper in some cases, do not offer permeability and may bring added costs or restrictions. As long as you understand the difference and confirm the installation process, a resin bound driveway can be an excellent investment for both practicality and appearance.