Type 3 Clause 805

Type 3 is a sub-base made from natural stone similar to Mot 1, but with a reduced level of fines allowing water to permeate better. Often referred to at MOT Type3, or DOT Type 3, it must comply with the Department of Transport Clause 805.

This material is used hardstanding in SuDs (Sustainable Drainage System) projects where better drainage is required than would typically be achieved by a MOT1. Most commonly, it is graded from 50/0mm however it is also available as a 70/0mm. It is frost resistant when used 450mm below surface.