Tarmac Drivewaysin County Durham & TeessideStrong, Even, Ready to Use in Days

A properly built tarmac driveway is constructed in distinct layers, each doing a different job. The compacted stone sub-base beneath everything provides load-bearing capacity and stops the tarmac above it flexing or cracking under vehicle weight; depth is adjusted to ground conditions, typically deeper on soft clay subgrades common across parts of County Durham than on naturally free-draining ground. On top of that sits the base course, a coarser, more open tarmac mix laid to establish the structural body of the surface, followed by the wearing course, a finer, denser mix that gives the smooth, weather-resistant finish you actually see and drive on.

Skipping the base course and laying wearing course tarmac directly over the sub-base is a common shortcut on cheaper jobs, and it produces a surface that looks acceptable initially but lacks the layered strength to resist rutting under repeated vehicle turning, particularly at the mouth of the driveway where most of the wear concentrates. We lay both courses as standard on driveway and access road work because it is the difference between a surface that lasts 15–20 years and one needing significant repair within 3–5.

Because tarmac has no rigid restraint of its own, the edge of the surface needs deliberate support, otherwise it simply breaks away under the sideways pressure generated by tyres, especially during turning manoeuvres near garages and gateways. We form edges in one of three ways depending on the property and budget: against an existing or new kerb line, against a block paved border laid on its own concrete haunching, or using compacted concrete haunching directly beneath the tarmac edge itself. A block paved border is a popular middle option, since it frames the driveway visually, adds a contrasting finish, and provides genuine structural edge support at a modest addition to the overall cost.

Falls across a tarmac driveway are set out during the sub-base stage using levels, so the finished surface directs rainwater towards a gully, channel drain or soakaway rather than pooling on the surface or running towards a building. Standard tarmac itself is impermeable, so where drainage capacity is limited or planning permeability requirements apply to a new area of hard standing, we can incorporate a soakaway, permeable edge strip or channel drain into the design rather than relying on the tarmac surface to manage water on its own. Getting this right at the design stage avoids the far more disruptive fix of retrofitting drainage into a finished surface later.

A domestic driveway is specified for car and occasional van loading, with sub-base and course thicknesses set accordingly. Farm access roads, commercial forecourts and shared accesses serving multiple properties see heavier and more frequent traffic, including delivery vehicles, and are built with a deeper sub-base and thicker base course to handle that loading without premature rutting. We assess the actual vehicles and frequency of use for each job: a shared access used daily by several households is a different specification to an occasional-use farm gateway, even though both might look similar on the surface once finished.