How thick should the asphalt be?

Driveways range from 25mm to 40mm (30mm is the most popular). Limestone base course restricts you to 35mm+ in thickness.

Carparks depends on traffic, cars 25-40mm (30-35mm most popular), heavy loads and trucks etc generally 35-50mm (40mm is the most popular).

Hardstands are 40-100mm depending on loading and budget.