Sub-base is available from local pits, quarries and wharves. They are supplied by recognised producers and meet relevant Highways, Water Industry and British Standards Specifications.
For highway engineering, sub-base is the layer of aggregate material laid on the sub-grade, on which the base course layer is located. For pavements, sub-base is the main load-bearing layer. Its role is to spread the load evenly over the sub-grade. The materials used may be either unbound granular, or cement-bound. The quality of sub-base is very important for the useful life of the road. Unbound granular materials are usually crushed stone, crushed slag or concrete, or slate.
The thickness of sub-base can range from 75-100 mm for garden paths through 100-150 mm for driveways and public footpaths, to 150-225 mm for heavy used roads, and more for highways.
Used for pavements, driveways, roads etc.
Please call for details.