A close-up view of 5-7mm drainage aggregate, a versatile material used for effective water management. The aggregate consists of small, rounded stones in various shades of gray and brown, providing a textured and natural appearance. This size is ideal for applications such as drainage systems, garden landscaping, and construction projects. The aggregate is shown spread out evenly, demonstrating its ability to facilitate water flow while preventing soil erosion. Its compact composition ensures durability and long-lasting performance.
General 

5 – 7mm Drainage Aggregate

5-7mm Drainage Aggregate, also known as 5-7mm Crushed River Gravel or 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.

One of the main uses of 5-7mm Drainage Aggregate, is as a drainage layer for Bio-Retention Pits, also commonly known as Rain Gardens.

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.

5-7mm Drainage Aggregate 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.

  • A close-up view of 5-7mm drainage aggregate, a versatile material used for effective water management. The aggregate consists of small, rounded stones in various shades of gray and brown, providing a textured and natural appearance. This size is ideal for applications such as drainage systems, garden landscaping, and construction projects. The aggregate is shown spread out evenly, demonstrating its ability to facilitate water flow while preventing soil erosion. Its compact composition ensures durability and long-lasting performance.

RECTANGLE OR SQUARE

Length in metres
Width in metres
Thickness in centimetres
Cubic Metres
5-7mm Drainage Aggregate Tonnes

CIRCLE

Diameter of circle in metres
Thickness in centimetres
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5-7mm Drainage Aggregate Tonnes

TRIANGLE BEDS

(Measure the two sides that meet at the 90° angle)
Length of the first side in metres
Length of the second side in metres
Thickness in centimetres
Cubic Metres
5-7mm Drainage Aggregate Tonnes