Tarmac can be a perfect solution to enhance Driveways and Paths, it can prove to be an extremely durable surface when installed properly. Dependant on the depth and structural make-up of the base (foundations) and the quality of top coat (overlay) initially applied the length of service tarmac will give, can vary. A well installed Tarmac driveway should be expected to have a minimum lifespan of 20 years onwards.