Patios, paths and paving
The build-up matters more than the slab choice: excavation to formation, compacted sub-base at a depth suited to the use, then a full mortar bed for natural stone and concrete paving or a laying course for block paving. Falls are set out away from the building, typically shedding water to a channel drain, gully or permeable area - and the finished level is kept clear of the damp proof course, which is one of the most common faults we are asked to correct. Joints are filled with the appropriate mortar or jointing compound, and edges are restrained so nothing creeps.
