Gravel grid WG "Matte Green"
- /
-
Delivery in approx.
1-3 days - £14.16 / 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.
Discount
Product Highlights
Product Details – Material and Structure
Patio slabs may be made from concrete, natural stone, wood, plastic or rubber granules. An even, firm and frost-resistant sub-base is required beneath every type. How much preparation is needed depends on whether the slabs are rigid or elastic and whether the patio already has a hard surface.
Rigid paving slabs made from concrete, natural stone or porcelain are heavy and liable to crack where support is uneven. They are laid on a levelled laying course of grit over a compacted sub-base, fixed with tile adhesive to a concrete base or set on adjustable pedestals. Decking boards and interlocking composite decking tiles are installed on decking joists or adjustable pedestals.
Rubber paving slabs made from PU-bound rubber granules are elastic and do not break. Deflection can occur over individual adjustable pedestals, so continuous support is required. On a patio already surfaced with concrete, asphalt, block paving or natural stone paving, the slabs can be laid loose without a mortar bed, tile adhesive or jointing compound.
If no such hard surface exists, a sub-base of gravel grids, also known as grass grids, is installed beneath the rubber slabs. The cells are filled right to the top with grit. The result is an even, water-permeable support for the patio slabs. No concrete is needed.
Safety tiles and rubber patio tiles sit more evenly on gravel stabilisation grids because the layer of angular grit is confined within individual cells. Once enclosed, the grains cannot migrate sideways under load or be washed out during heavy rain. The bedding beneath the tiled area therefore remains more stable over the years.
A loose bed of crushed, angular grit is usually single sized, with few or no fines to fill the voids between the grains. It can therefore remain mobile even after compaction. This movement does not affect the seating of a rigid concrete slab, but elastic safety tiles and rubber patio tiles made from rubber granules distribute imposed loads less evenly across the sub-base. Grit may gradually be displaced towards the tile edges. Bearing is then lost beneath the centre, which can settle, while the displaced grains accumulate under the perimeter and raise the edges. The result is a tile with a sunken centre and upturned edges.
With gravel stabilisation grids in place, the loose grit is divided into small compartments and forms a stable sub-base. These components are also described as gravel grids, grass grids or plastic honeycomb grids. Every cell is filled flush with its upper edge, so the enclosed grains remain in position under load and during heavy rain. The stated load capacity of the filled grids is up to 400 t/m². The completed area remains permeable to water, and where the ground allows rainfall to soak away, a fall and separate drainage are usually unnecessary.
Ground preparation can also be reduced where the soil is firm and the area is only lightly used. Once the topsoil has been removed, the grids can be placed on a thin levelling bed of angular grit. This requires less excavation than a conventional construction. A sub-base of compacted crushed stone is only required where the ground is weak, a frost-resistant build-up is needed or the area will be exposed to higher imposed loads.
Gravel stabilisation grids can be installed in three ways, depending on the ground conditions. They may be laid directly on the prepared formation over firm existing ground, set in a bed of angular crushed grit on the formation, or placed above a compacted crushed stone sub-base. In every case, the cells are filled completely with angular crushed grit and struck off flush with the top edges of the grids.
For firm ground subject to light use, the grids are laid directly on the formation. The topsoil is removed and the formation is prepared carefully before the grid units are positioned. Their 4 cm ground spikes penetrate the soil beneath.
Where minor irregularities need to be levelled, a thin bed of angular crushed grit is placed on the formation. This layer should be about 2 to 5 cm deep. The grids are set into the grit so that the ground spikes pass through the layer and enter the soil below.
If the ground is less firm, a frost-resistant build-up is required or heavier use is expected, a crushed stone sub-base is built up and compacted in layers. The ground spikes cannot penetrate the compacted crushed stone. A layer of angular crushed grit at least 6 cm deep is therefore placed over the sub-base, allowing the spikes to be fully embedded in the grit and the grids to be fully bedded.