Bock paving query. Do you wacker the sand then lay block or vice versa.?
the ‘base’ has to be firm before applying any sand at all. so it should be whacked if need be, apply sand and whack again reapply if necessary ( it often drops level as its compacted. and screed it level, ( do not forget a Small slope for rain run off etc) apply paviors and whack again with silver sand application being used. brush off and job done. the more you compact the base/sand layers under the paviors the better it will stand up to loading ( car/walking etc) over it’s surface without moving. note heavy loading over same area eg a van etc will in almost all cases move the paviours just as the roads you see move ( rut) when heavy lorries continuously travel over the same part of the road.
