For multi-storey window replacement in Singleton, the technical sequence begins with external making good, so we finish external reveals, render or masonry interfaces around the installed frame, with external making good kept as the lead check for this multi-storey window package scope. We then use final checks to coordinate upper-floor access, frame handling, room sequence, protection and waste removal, and we open, close, lock and inspect each installed window before the work is handed over, with external making good kept as the lead check for this multi-storey window package scope. Before closure, fixing points is reviewed and we position frame fixings to suit the opening, frame profile and surrounding substrate, with external making good kept as the lead check for this multi-storey window package scope. The handover also covers trims; we coordinate internal or external trims with reveals, frame position and adjoining finishes, with external making good kept as the lead check for this multi-storey window package scope. Together these checks support a multi-level replacement programme with access and room order planned before installation.