How to use a gravel grid

A common question we find that our customers ask often is how to use a gravel grid. In this guide we will look in particular at how to install a DuPont GroundGrid Gravel Guard. This product is exclusive to Drainage Superstore and comes highly recommended by groundworkers.

Other options such as the ACO GroundGuard and Gravelgrid Reinforcement Grids are also available. These are installed in a similar fashion. If you are unsure which grid is best for your project, give our drainage experts a call on 01752 692 221.

Step 1: Prepare the ground

First, dig out the area required. Make sure that the ground isn’t too soft, and that it is suitable for the gravel grid to fit into. As standard, each pack comes in 10m2 size.

Step 1: Prepare the ground

Step 2: Lay down geotextile membrane

Next, lay down a layer of geotextile membrane. This prevents the area from flooding and ensures that it stays sturdy.

Step 2: Lay down geotextile membrane

Step 3: Lay down and pin the gravel grid

Stretch out the gravel grid and pin one end into the ground. Then, slowly stretch the grid to the other end and pin that into place.

Step 3: Lay down and pin the gravel grid

Step 4: Fill in the gaps

Fill each end of the grid with a handful of aggregate to make sure it sits in place. Use a timber board to ensure sure that the grid is in constant contact with the ground when doing so.

Use the correct size infill material for the cell size. Limit the drop height to no more than 1 metre. Regardless of whether you’re using a wheelbarrow or a machine, take your time to make sure that the infill material does not ‘lift’ the cells.

Spread the infill material equally over the surface and make sure that each cell is fully filled using a shovel or rake.

Please be aware that only crushed, angular gravel should be used to fill the cells. Pea shingle or cobble type products may only be used as a decorative surcharge on top of the grid.

Step 4: Fill in the gaps

Step 5: Add the finishing touches

A top layer of material is required on top of the grid, especially in trafficked areas like car parks. This could be a roll of grass, for example.

If the top layer is a different material than the internal cell infill, make sure you have filled the cells to capacity and allowed room for any extra movement. You can use a hand roller to achieve final compression of the infill material.

Being factory-made from a geotextile material, the edges of DuPont GroundGrid are very narrow and as such not clearly visible. However, it is always advised to maintain the suggested surcharge on top of the area to shield the edges from car wheels.

Step 5: Add the finishing touches

If you would like any advice or extra assistance on how to use a ground grid, call our drainage experts on 01752 692 221.