MOT type one is a crushed to provide a stable sub-base for road surfaces and pathways. The mixture of solids and fines ensures minimal voids in the sub-base material when compacted, giving a strong load bearing layer with a suitably flat surface. Typical use is as a finished surface prior to a top coating of asphalt, concrete, shingle and block paving. Often used with a sand blinding. Both primary and recycled constituents can be used to produce a Type 1 sub-base. The approx weight is 850kg not 1000kg.