Our friends at the ScreedScientist.com website have produced some diagrams that compare the two concepts of ‘Departure from Datum’ and ‘Surface Regularity’. If you get confused by these two concepts (especially when they interplay) or are indeed talking to contractors, construction professionals or in fact anyone who is involved in the project then these diagrams can help to clarify matters and ensure that everyone is using the same language. (If you came here looking for a pun…. we hope this information will level the playing field) Find out more.