Edge Restraints
Edge restraints should be provided along the perimeter of all paved areas and should be adequate to support traffic loads in order to prevent deterioration of the paving by sideways slipping away of the pavers.
The edge restraint may be in the form of a kerb, combined kerb and channel or vertically fixed pavers. Using pavers has the advantage of uniform appearance. The best way to place the edge restraint is about 20mm lower than the paving surface, enabling good drainage. Depending on the traffic load, the edge restraints are haunched with concrete slabs (suitable for heavy loads) or placed directly on the sub-base (suitable only for light traffic, footpaths and gardens).