At Construct-a-Driveway all our driveways are completed to a very high standard with the use of only quality materials here is how we do it .
The Tarmac Driveway preparation and processes red or black are as follows, all the ground will be excavated and removed by machine were possible to a minimum depth of 250mm or until a clay sub-base is found. If the driveway requires drainage this will be laid and connected to remove surface water.
The next step is where we lay a Geo- textile membrane that will eliminate the problem of weeds and forms a separation barrier so the stone does not mix with the the sub soils and also aids drainage, we will then infill all the excavated area the a type 1 m.o.t aggregate stone at a minimum thickness of 175mm making sure that is compacted down to the required depth, next all the perimeter of the new driveway will be edged with decorative block or edging kerbs laid and secured with concrete. We then infill all the area with a 20mm dense base course binder tarmac and roll it at a thickness of 50mm.
The final topping is laid and rolled to smooth finish, this is usually 6mm dense wearing course tarmac but there are other grades available, this is laid at 25 mm thickness. Finally any debris is cleared and the area is washed down.
Tarmacadam, properly referred to as bituminous macadam or “Bitmac” for brevity, is often thought to be the cheapest method of surfacing a driveway or forecourt, black tarmac is cheaper than the red tarmac, the red tarmacadam can be more expensive than block paving.
Tarmac has become a popular to surface pavements, highways and even internal floors. tarmac is suitable for areas to be trafficked by vehicles, such as a drive or forecourt, and can be used for paths, with a mixture of block paved borders or decorative designs within the tarmac your new driveway will be enhanced and pleasing to the eye.
The surface course can be coloured by using a binder, often with coloured aggregates, or by incorporating coated stone chippings into a HRA wearing course.