Gravel grid WG "Matte Green"
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Ready to ship
in approx. 7-14 days - €16.81 / 4.42 Piece / m²
- (1.00 kg / Piece)
EAN: 4251469336346 | Item no.: 3634
Plastic ground grids are a versatile and economical solution for stabilising outdoor surfaces. They serve both as an ideal base layer for rubber flooring tiles and as an independent ground reinforcement system for paths, driveways or parking spaces – wherever a long-lasting, load-bearing surface is needed with minimal effort.
Depending on the intended use and expected load, the grids can be installed directly on natural ground, in a compacted gravel bed or over a frost protection layer. The subsequent finish depends on the desired application:
– The grids can be half-filled with soil or substrate and sown with grass, creating a reinforced but natural-looking green surface.
– They can be completely filled with gravel or chippings to create walkways, driveable areas or a base for rubber tiles.
– The surface can be overfilled by approx. 2 cm with decorative gravel, creating a stable and visually appealing gravel driveway or patio.
Installation is straightforward and requires no machinery. Often, it’s sufficient to remove the topsoil, level the base, and embed the grid into a gravel layer. This keeps excavation, material use and labour to a minimum – while still delivering high stability and durability.
WARCO recommends plastic ground grids as a base layer on unbound subsoil – especially where a path, terrace, playground or similar area is to be created on a meadow or natural surface. The result is a solid, permeable and unsealed surface – allowing rainwater to drain naturally into the ground.
The grid features integrated ground spikes approx. 4 cm in length that actively anchor it into the sub-base. On two sides, interlocking pins engage with matching sockets on neighbouring units to form a secure, load-stable grid system. Once filled with gravel, the surface can withstand loads of up to 400 t/m².
Each unit is made from a single-type plastic regranulate based on PE and PP production offcuts. The material is free from harmful substances, frost-resistant and fully recyclable. Combining both plastics ensures excellent mechanical strength and long service life.
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Product Highlights
Product Details – Material and Structure
The formation beneath patio slabs must be level, have adequate load-bearing capacity and be well drained. For ground-level patios, the substrate must be built to withstand frost. The precise construction depends on the type of patio slab and the existing site conditions.
For a ground-level patio, the sub-base comprises a formation with adequate load-bearing capacity and adequately compacted frost-protection and load-bearing layers. Rigid concrete or natural stone slabs are normally laid on an evenly screeded laying course of chippings. Depending on the system, ceramic patio slabs may be installed on a laying course of chippings, on adjustable pedestals or in a bonded system. Timber and WPC decking require a suitable substructure.
Patio tiles made from PU-bound rubber granules require continuous support and cannot be supported at individual points on adjustable pedestals. On sound concrete, asphalt, concrete block paving or natural stone, PU-bound rubber granule tiles can be loose-laid without a mortar bed. The existing substrate must allow water to drain at an adequate fall towards an outlet or infiltration area.
On an unpaved substrate, first create a level formation with adequate load-bearing capacity. A gravel grid laid across the full area can provide stable, water-permeable support on this formation. Fill the gravel grid cells completely with suitable chippings. Depending on substrate conditions and frost exposure, a compacted frost-protection and load-bearing layer beneath the gravel grid may also be required. A concrete slab is not required for a gravel-grid construction.
Playground safety tiles sit more evenly and remain stable for longer on gravel grids than on a loose grit bed. The honeycomb cells hold the aggregate in place, with the material contained within each individual cell. It can neither move sideways under load nor be washed out during heavy rain, so the tiled surface remains stable and safe over the years.
In a loose grit bed, the particles are broadly the same size and lack the fine material that would fill the voids. Even after compaction, the grit remains mobile. This movement is irrelevant beneath a rigid concrete slab, but an elastic playground safety tile or patio tile made from rubber granules does not spread loads evenly through the substrate. Over time, the grit may be pushed towards the tile edges. The rubber tile then loses support in the centre and sinks there, while displaced grit accumulates beneath the edges and lifts them. This pattern of damage is known as dishing.
Gravel grids are also sold as grass grids, gravel cells or plastic honeycomb grids. They turn a loose grit bed into a stable sub-base. When filling the cells, the aggregate is levelled exactly to the top edge. The contained material stays in place under load and in rain, leaving the tiled surface stable and safe. Filled grids can support up to 400 t/m², while the whole area remains water-permeable. Where the ground is permeable, a gradient and drainage are usually unnecessary.
On load-bearing ground subject to low loads, it is sufficient to remove the topsoil and lay the grids on a thin levelling layer of grit. Less excavation is required than for a conventional construction method. A sub-base of compacted crushed stone is only needed where the ground has limited load-bearing capacity, where the construction needs to be frost-proof, or where the area must carry higher loads. This limited amount of work is an argument in favour of gravel grids.
Gravel stabilisation grids can be installed as a sub-base in three ways: directly on in-situ ground, on a grit laying course over the formation, or on a crushed-stone sub-base.
The grid cells are filled with crushed, angular grit. The cells are filled to the top, and the grit is levelled flush with their upper edges.
Where the ground has sufficient bearing capacity and is only lightly loaded, installation directly on in-situ ground is sufficient. Topsoil must first be removed, and the formation must be carefully prepared. The grids are laid directly on the natural ground, allowing the 4 cm ground spikes to penetrate the soil.
A thin grit layer can be laid over the formation to even out irregularities. The ground spikes extend through this grit layer and into the formation.
Where the ground has a low bearing capacity, protection from frost effects is required, or high loads are expected, a crushed-stone sub-base must first be installed and compacted. The ground spikes cannot penetrate the compacted crushed stone. A grit layer is therefore laid over the sub-base so that the spikes are fully embedded. This grit layer must be at least 6 cm thick, and the grids must sit firmly on it.
Gravel grids are also sold as grass grids or plastic cellular grids. The grids are set into the thin grit layer, which is about 2 to 5 cm thick when used to even out irregularities.
