Type 1 Sub Base is generally a 40mm graded to dust material, it is highly compatible. and typically used in the construction of roads, car parks, pathways and hard standing areas.
The material is laid and compacted to form a level stable construction layer for building platforms, asphalt or concrete
Please note that the stones are measured at the narrowest point. The sizes used on the page therefore refer to the technical measurement. Because the gravel is measured at the narrowest point, the actual size may vary slightly.
