Driveway Paving in Kent, Hertfordshire, London & Essex Home About us Area covered Driveway paving Patios Gravel driveways Before & after Product selector Driveway & Patio repair Enquiries Contact us       Patios. We dig 150mm, lay a membrane to help prevent shifting and sinking. We then put down 75mm of Ministry of Transport type 1 sub-base. Slabs are then laid on mortar or a screed of sand and cement - depending on the type of slabs - then pointed with mortar. If blocks are your choice, then 50mm of sharp sand plus the blocks go on top of the sub-base.  Woodland Paving Ltd - Patios, Driveways, Pathways & Walling. driveway paving London - driveway paving Essex - driveway paving Hertfordshire - driveway paving Kent driveway paving website designed and hosted by webglow.co.uk