Hi, i have just had a company around today to quote me for a patio to be layed where the existing one is, not sure if this is a cowboy way of laying my new patio but he said he would lay it over the existing patio slabs which is pretty level and solid, to me i thought he would take the old slabs up and put a new MOT base in etc? Bit confused and not really sure if this is acceptable? Would be nice to hear your views on this. Thank you