What is DBM Overlay – Dense Bituminous Macadam?
This surfacing uses a more traditional type of material called dense bituminous macadam. The material is hot applied on the road surface by a machine. To gain adequate strength the material is laid in thickness between 30-40mm. DBM provides a good quality smooth surface and improved skid resistance. This treatment is used on roads with less demanding traffic flows and severe irregularities or structural problems.
