@ "Onik500": The problem with public forums, as you can see, is the diversity of opinions. Please do not be discouraged and present the facts to your screed layer! In the end, who placed edge strips where and how is irrelevant. Because as soon as, for example, the screed is installed, the responsibility for the proper preceding work transfers to that contractor. They must recognize any possible weaknesses there as a specialist within the scope of their inspection duties, which must of course be carried out with the customary care in the trade, and if such exist, notify the client of any concerns. Regards: KlaRa