What preparation is required before the extrusion process can begin?
Alignment of the extrusion machine and therefore the kerb produced is controlled by an offset string line set by us to datum’s given by you. These datum’s are usually as simple as marks on the road surface at 30 linear metre intervals indicating the position of the front face of kerb. It is also helpful if the start and stop location of each kerb run are clearly indicated together with any required termination detail. The road surface must be clean and free from debris. A proprietary bituminous emulsion is supplied and sprayed by us on to the road surface directly under the intended kerb line. The level of the kerb is directly dictated by the surface upon which is extruded. As the kerb mould runs directly on the road surface, the wearing course must be constructed beyond the proposed line of the rear face of the kerb – this width can be as little as 20mm.
