Type 1 Limestone is the name given to crushed limestone, which meets the requirement of the department of transport specifications for highway works. It is a high-quality fill or sub-base material and is often used in the construction of car parks, driveways and highways.
Although this product can be more expensive, it is often used in other light-use domestic applications such as paths and patios. As a quarried, processed rock it is more solid and stable immediately and over time.