Excavate to form sub grade at a depth suitable for your pavement.
Excavate 210mm or more if required. The minimum recommended depth of basecourse is 125mm. For the driveway to carry SUV’s and occasional trucks add 50% (65mm) to the depth of the base-course. If required for handling water, and the sub-grade is impermeable, contour the sub-grade so water will drain to a filter fabric wrapped drainage coil, and excavate trenches and runoff areas for drainage coil, or connect it with the storm water drainage. If required because of soft, wet or clay foundation conditions, lay mud stop on the sub-grade.
LAY THE BASE COURSE
Lay AP40 basecourse and compact it with a plate compactor to a compacted depth of 125mm or more if required.
INSTALL THE EDGING
Edging is required all around your paved area. It protects the edge of the Natural Paving mat, retains the pebbles on the mat, and makes a suitable edge so mowers don’t fling pebbles. You can use any material for edging, or butt the mat against walls or existing paved areas For pathways, place the edging on the subgrade, but for driveways you lay the base course first.
Lay a 35 to 40mm layer of bedding material on the compacted base course. Screed the bedding material to contour the surface close to the finished shape, and compact it. Bedding material is AP7 or bedding sand.
LAY THE NATURAL PAVING MATS
Natural Paving mats are large and easy to lay. They have geotextile welded to the base to anchor it down and prevent weeds growing through it. At two edges of the sheet there is an overlap area in the mat that gives continuity to the weed resistance. There is no clipping together required. The mats can be cut with a hand saw, circular saw, cut off disc. You can easily free form the mats to follow complex shapes.
SPREAD THE PEBBLES
Pour your pebbles or gravel onto the mats and spread with rakes or the like. The pebbles will settle into the mats over time, so fill the mats 20mm deeper than the mat surface and it will settle to a long term thickness of about 10 to 15mm over the top of the mat. This hides the mat so it is invisible, and protects the mat from the sun.