Tree Root Protection

Tree Root Protection & No Dig Scenarios

Grass Tree Root Protection

EcoGrid is the ideal product to produce a durable, load bearing and permeable solution for all low or no excavation scenarios.

  • A strong and sturdy ground
  • Avoid fines for damaging protected tree roots
  • Environmental friendly
  • Long-lasting

  • Easy to install
  • Compact for delivery

The Basics

A drainage layer gets laid, which corresponds to the type of traffic that will access the surface. This is generally classed as type3 reduced fines. This means 20mm stone mixed with smaller stones to create a firm foundation but the difference between this and type 2 is that the ‘dust’ content is removed, making the sub-base as porous as possible. It is also possible to use clean 10-20mm stone. Often a plate test is carried out to ascertain the type of surface to be excavated. This means a plate that can be 250-500mm round or square is placed on the ground, and a load is placed on the plate (often a simple tire jack and a vehicle). The depth that the plate sinks will show the type of ground conditions and the corresponding depth of the sub-base. This is often classed as the CBR (California bearing rate). In layman’s terms, it means the firmness of the soil to be excavated.

We often get scenarios where excavation is not possible or is minimal, such as sites of archaeological value or areas where tree roots need protection. 

Here, the sub-base needs to be as thin as possible whilst still retaining surface loading capability. Often here, we advise laying of a geotextile layer first, then a layer of (for example) 100mm clean 20mm stone retained by our EcoGrid Cell Web, a secondary geotextile layer is then laid, and then the EcoGrid standard grids or EcoGrid Bloxx gets laid.

An EcoGrid approved geotextile layer follows to enhance surface support, provide a layer of filtration and stop the drainage layer stone from migrating up to the surface. A screed layer is laid. This can be a large granulate sharp sand or clean fine sharp angular gravel, typically 20-30mm deep-laid, leveled, and compacted.

The grids are then laid as per our fitting advice or downloaded fitting sheets. Grid fill can be as aesthetics determine but should be:

  • Sharp angular stone (river bed rounded stone is not as suitable as it does not lock in to the grid cells as well and there is a potential for a small amount of travelling)
  • 15-30mm is best as the larger stones lock better and do not stick in to tyre treads
  • Crushed slate is our own infill of choice, especially Crushed Welsh slate as this is an abundantly available option and blends nicely with the black grids.

The Importance of Trees

Trees contribute such a heavy amount to our daily life. It is vital that we protect as many trees as possible. Check out the following illustration for the value of trees, the impact of trees and the role of trees.

Tree's Asset Value Calculation

An Example Tree's Asset Value Calculated Using CAVAT103

The Value of Trees in Urban Environments

The Role of Trees

The Impact of Trees

The Impact Of Trees On Use Value


No-dig geocellular tree root protection is an alternative to traditional methods of constructing paths, roads and parking areas in and around trees. It is designed to protect the root structure of the tree from damage caused by the compaction of local soils as a result of vehicular traffic.


  • Access roads and parking areas
  • Driveways and paths
  • Permanent woodland trails
  • Temporary access roads and working platforms


  • No excavation or minimal excavation required
  • Prevents compaction around root structure
  • Simple and quick installation
Tree Root Protection Cross Section Using EcoGrid

The EcoGrid Tree Root Protection cellular confinement system is a no dig solution preventing damage to tree root structures during the installation process. The EcoGrid cellular confinement and EcoGrid combination is quick and easy to install, reduces construction time and in many instances greatly reduces the depth of imported stone required, saving time and money and reducing the environmental impact of the project.

The EcoGrid Tree Root Protection cellular confinement system is expanded on site and then filled with a clean no-fines stone; the strength of the system comes from the containment of the stone within the structure, although unlike traditional construction this is achieved without compacting the stone and the subsequent loss of permeability. It is manufactured from strips of high density polyethylene HDPE cross welded to form cells, the strips can also be perforated if required to allow the lateral movement of air and water through the structure.

The porous surface also ensures water and air can carry essential nutrients to the tree roots. The EcoGrid Tree Root Protection cellular confinement system is a non-woven geotextile positioned to prevent any fines washing through and ultimately clogging the system, preventing the water and air from reaching the roots over the lifetime of the tree.

Many surfaces are suitable for use the EcoGrid Tree Root Protection cellular confinement system and these include EcoGrod E50, EcoGrid E40, EcoGrid E30 and EcoGrid Bloxx.

In temporary applications there is usually no requirement for a top finish as The EcoGrid Tree Root Protection cellular confinement system acts as the surface (load dependant).

The EcoGrid Tree Root Protection cellular confinement system can be used for both permanent and temporary projects. In temporary construction scenarios the system can be removed without damaging the roots once operations on site are complete.


Supporting Documents

Product Overview

thumbnail of EcoGrid Main Brochure

Tree Root Protection

thumbnail of EcoGrid Tree Root Protection

EcoCell Specification

thumbnail of EcoGrid WebCell Spec

So, which EcoGrid?

The following grid options are suitable for your desired application. Learn more about each on the EcoGrid product pages.

EcoGrid E30 Permeable Paving Grid

EcoGrid E30

Learn More
EcoGrid E40 Permeable Paving Grid

EcoGrid E40

Learn More
EcoGrid E50 Permeable Paving Grid

EcoGrid E50

Learn More

Fully Permeable

‘Kind to the environment’

100% free draining providing a complete SuDS solution. EcoGrid is carbon neutral and has zero effect on the environment. EcoGrid is made from specially selected plastics that would otherwise be sent to landfill.

Beyond Strong

‘Loads of up to 800t/sqm’

Our loading capacities are independently tested and published. Our range is fully tested and approved by the European TUV and RAL centres. EcoGrid is also a fully approved NATO supply product with tens of thousands sold worldwide.

Unrivalled Solution

‘The World’s #1’

With over 1.5 million sqm sold in 2017, EcoGrid is unrivalled in product sales. With a fully automated, sustainable European factory. We also go ‘the extra’ mile with technical advice and general assistance.

More Applications

EcoGrid can be used for a huge variety of applications; from lightweight landscaping implementations to heavyweight aviation surfacing.

Grass Filled EcoGrid Car Park With Bay Markers

Grass Surfacing

Light Resin Bound Stone Driveway

Resin Bound Stone

Horse And The Rider On Horse Arena With Tread Layer

Equestrian Applications

EcoGrid Ground Reinforcement For Heavy Duty Vehicle In Construction

Construction Sites