There is a big issue in Ireland regarding window cill replacement with EWI systems.People dont like the idea of using metal for reasons such as sound,easy damage,appearance and so on.The other solution is to stick a false nosing on and render.This i definitly disagree with as you cant plaster a flat surface to shed water away other from a building, otherwise we would be plastering roofs plus you created a joint were the nose meets the flat surface.What mainly used in the UK and is there any concerns for people.