Gabion Stone and Gabion Rock Fill

Sizing to the mesh

Fill should be at least 1.5 times the mesh aperture. For a standard 80×100 mm mesh that means 100–150 mm stone. Undersized fill escapes and the wall slumps.

Face grade vs bulk fill

On visible walls, hand-packing a sorted face grade at the outer skin and using cheaper bulk fill behind it gives the finish at a fraction of the cost.

How much stone per basket, in practical terms

A common 1m × 1m × 0.5m gabion basket holds roughly 0.75–0.85 cubic metres of stone once packed, which at 1.5–1.6 tonnes per cubic metre for gabion-grade rock works out to around 1.1–1.3 tonnes per basket — always confirm basket dimensions before quoting tonnage on a wall run.

Alternative for lightweight or aesthetic walls

Where structural load or freight weight is a constraint, a smaller decorative face-grade stone in a shallower welded-mesh gabion panel, backed by a lighter core fill, achieves the same visual result at a fraction of the total tonnage of a full-depth gabion wall.

A common specification mistake

Ordering a single stone size for the whole wall rather than separating face grade from bulk fill. A uniform coarse grade throughout wastes money on the visible face, where a hand-packed, size-sorted layer looks far better for a small extra labour cost.

Pre-shipment inspection for fill grade

Before loading, we screen a sample from each production run to confirm the stone falls within the specified band and is hard, non-friable rock rather than material that will break down under load or weathering inside the cage. For visible wall projects we also check the face-grade sample separately from bulk fill, since a soft or crumbly stone in a load-bearing gabion wall is a structural risk, not just a cosmetic one.

Drainage behaviour in retaining wall use

Gabion walls are inherently free-draining, since the voids between stones let water pass through rather than build up hydrostatic pressure behind the wall — this is one of their main structural advantages over solid concrete retaining walls. This only holds if the fill stone itself is properly graded; too much fine material packed in with the coarse fill can partially clog the voids and reduce drainage performance over time.

Freeze-thaw performance of gabion fill

Hard, dense gabion-grade stone such as granite or basalt resists freeze-thaw cracking well over the wall's design life. Softer, more porous stone can absorb water and spall under repeated freezing, gradually reducing individual stone size within the cage. In cold climates we recommend specifying a hard, low-porosity stone type for gabion fill even where a softer, cheaper stone might be tempting for a large tonnage order.

Wholesale, bulk and export details

This product is supplied on the same commercial basis as the rest of our range: quantity confirmed against container payload, packing quoted separately and documentation prepared to your broker's brief.

Questions buyers ask about gabion stone

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