What is MOT Type 1?

MOT Type 1 refers to a graded aggregate material typically made from crushed limestone or granite, specified under Department of Transport standards for use as sub-base hardcore in paving and construction projects across the UK. In Cheltenham driveways and commercial paving work, it forms the foundation layer beneath tarmac, concrete, or block surfaces.

The material compacts exceptionally well due to its angular particle shape and the blend of stone sizes within the grading, which allows smaller fragments to fill voids between larger pieces. This dense packing reduces settlement and movement after installation, creating a stable base that prevents surface cracking and premature failure. The specification ensures consistency in particle distribution, typically ranging from dust fines up to 40mm stones.

Paving contractors specify MOT Type 1 because it provides reliable long-term performance without additional binders, remains cost-effective compared to stabilised alternatives, and meets the requirements of British standards for drainage and load-bearing capacity. Its availability from bulk suppliers makes it practical for both small residential jobs and larger commercial projects. Proper compaction with mechanical plant is essential to achieve the specified density and ensure the sub-base supports surface layers correctly over time.

When sourcing materials for your project, paving contractors in Cheltenham can advise on quantities needed and oversee correct installation to specification.