Construction Services
Products and Services
Tarmac
From Highways to Local Authorities, Housing Developers to Home Owners, Machine Lay or Hand Lay, DTS have the tarmac mix for any application.
There are three main types of ‘tarmac’ surface
- Hand Lay Asphalt - for driveways and footpaths
- Machine Laid Asphalt - for larger driveways; forecourts and roads
- Hot Rolled Asphalt - for an extra wearing course on public roads
Tarmac is usually made up of at least three layers, each laid on top of the other.
Layer 1 - Sub-base
The main load-bearing layer of the roadway, which spreads the load of the weight of traffic. Typically an aggregate layer of Type 1, Type 2 or Crusher Run.
Layer 2 - Base Course
Strengthening layer of the roadway, usually laid 40mm-50mm thick comprising of 20mm or 28mm aggregate in a tar binder
Layer 3 - Wearing Course
Top layer of the roadway/path, consisting of a smaller, harder aggregate usually 6mm or 10mm in a tar binder. Typically this will be in a limestone or hardstone.
Limestone - will wear over time and give a greyish finish to the surface.
Hardstone - will remain darker as the surface wears.
PLEASE BE ADVISED THE BELOW LISTS ARE TO BE USED AS A GUIDE ONLY - DIRECT TO SITE CONSTRUCTION SERVICES HOLD NO RESPONSIBILITY FOR SPECIFICATION AND CAN ONLY OFFER GUIDANCE. DTS SUPPLY ALL PRODUCTS TO THE CUSTOMER AND SITE SPECIFICATIONS AS ADVISED AT TIME OF ORDER.
| Tarmac Coverage | ||
| Tarmac Layer & Aggregate | Depth Laid | Coverage |
| 6mm Dense Wearing Course | 25 mm | 15 - 19m2/T |
| 10mm Dense Wearing Course | 40 mm | 10 - 12m2/T |
| 20mm Dense Base Course | 50 mm | 8 - 10m2/T |
| 28mm Dense Base Course | 65 mm | 6 - 7.5m2/T |
| Tarmac Dig Depth Estimates | |||
| Tarmac Layer | Footpath | Driveway | Access Road |
| Wearing Course | 20 mm | 25 mm | 25 mm |
| Base Course | 40 mm | 50 mm | 70 mm |
| Sub-base | 100 mm | 100 mm | 150 mm |
| Total Depth Required | 160 mm | 175 mm | 245 mm |
