MOT Type 1 is a certified sub-base material that consists of crushed granite, gritstone, limestone or basalt. Also called Type 1 MOT or DOT Type 1, this sub-base features particles with excellent load-bearing qualities that range from 40mm down to dust, making them easy to compact.

MOT stands for Ministry of Transport whilst DOT stands for Department of Transport. Our MOT Type 1 sub-base complies with the Department of Transport Specification for Highway Works, clause 803 (SHW 803).

MOT Type 1 sub-base can be used for haul roads, building sub-bases, hard-standings, patio sub-bases, highway sub-bases and driveway sub-bases. These sub-base aggregates are suited for applications that require certified material to be used, such as the construction of public roads.

A sub-base is used to provide an extra layer of support to overlying surfaces whilst helping spread the load evenly over the subgrade. Thus, having a sub-base is essential for patios, driveways and other types of paving. 

However, should you opt for standard sub-base aggregates or certified sub-base aggregates? The main difference between the two is that MOT Type 1 is approved to be used in the construction of pavements and highways by the Department of Transport. This approval highlights the high quality of MOT Type 1 aggregates. 

At Mainland Aggregates, we supply a wide selection of sub-base materials, from certified sub-bases to standard sub-bases. This includes quarried sub-base aggregates, such as MOT Type 3, as well as recycled sub-base aggregates, such as road planings. If you require further assistance or more information about our sub-base aggregates, get in touch with our team today.