A clean metal graded from 20-45mm, with no dust.
From the same stone as the Gaps, this metal differs in function quite drastically, instead of compacting down to form a solid layer this metal functions to allow cracks and holes throughout the layer so that water may pass through it.
Commonly used around drainage coils and behind retaining walls, it is also used to fill large pot holes (before applying a top layer of Gap 20), or act as a strong sturdy base before putting finer aggregates on top.
Available by the:
1/3 Cubic Metre
1 Cubic Metre