How much do I need?
The area is
metres wide,
metres long and
metres deep.
=72m3
This product is a scoria substitute in certain parts of the country. It is a clean metal commonly used around drain coil and behind retaining walls. The aggregate range is from 20mm - 40mm.
On Waiheke Island the Drainage Metal grades available are 7/14mm, 20/40mm and 40/60mm .