These products consist of graded limestone and do not contain dust some times these are referred to as “cleans”.
1” Clean (14 to 28 mm)
2” Clean (40 to 50 mm)
3” Clean (50 to 75 mm)
These types of product are generally used for back filling and levelling of excavated areas where an open surface is required. This enables the surface to freely drain of water; the size of the material used is dictated by the area being covered.
This is a single sized aggregate mainly used in land drains, and as above allows water to pass through it.
It can also be used in a similar way to the clean materials previously mentioned.