5-7mm Crushed River Gravel, also known as 5mm or 7mm CRG, is a natural product used for back-filling trenches, around PVC and Ag-Pipe, and for drainage behind retaining walls. As this is a natural construction product, the colour of the rock varies from a light grey, to blue, to brown in colour.
These products can also be used for a base underneath concrete and can even be blended into concrete mixes due to their high compressive strength.
5mm-7mm Crushed River Gravels is available by the tonne.
Unsure of how much material you need?
To assist you in your latest project we have provided a convenient Quantity Calculator that will guide you through any job. Please note that this is only to be used as a guide.