For dual-colour uPVC windows in Clayton-le-Woods, the technical sequence begins with frame dimensions, so we confirm manufacturing dimensions against the surveyed opening before the replacement frame is ordered, with frame dimensions kept as the lead check for this dual-colour windows scope. We then use fixing points to coordinate internal finish, external finish, trims, sealant colours and adjoining decoration, and we position frame fixings to suit the opening, frame profile and surrounding substrate, with frame dimensions kept as the lead check for this dual-colour windows scope. Before closure, glass specification is reviewed and we match glazing type and pane configuration to the intended room use and project specification, with frame dimensions kept as the lead check for this dual-colour windows scope. The handover also covers final checks; we open, close, lock and inspect each installed window before the work is handed over, with frame dimensions kept as the lead check for this dual-colour windows scope. Together these checks support frame finishes coordinated separately to the interior and exterior appearance.