Type 3 Primary
Hardstone
Description
A Limestone/Granite permeable sub-base produced from quarried crushed rock containing particles ranging from 0mm to 40mm
Uses & benefits
- Used to create a load bearing permeable sub-base typically for sports pitches
- Permeable paving/SUDS (sustainable urban drainage systems)
- Equestrian arenas
- Driveways
- Paths
- Patios
- Tennis courts where drain blockage may be an issue
- This is an open graded material, however it will have a reduced number of fines when compared to a Type 1. This allows water to permeate at a high rate which means that it drains very well but due to the material particle sizes still retains it's strong load-bearing qualities
- Type 3 is often mistaken to contain zero fines, which is not the case
- Not to be confused with a graded 4/20 Cleanstone
*Picture is a guide, colour may differ