A straight gravel drive is an incredibly cheap and effective way to spruce up your driveway. Here at NPD we use either a 20 mm or 10 mm washed golden gravel spread 40 mm in a geo tex gravel grid placed over type one crushed concrete. Also on existing gravel drives we can remove existing gravel and give it a fresh coat of stone. Simple gravel is a great choice and a quick and cost effective solution.