For bathroom uPVC windows in Lostock Hall, the technical sequence begins with frame alignment, so we check the frame for line, level and square before glazing and final tightening, with frame alignment kept as the lead check for this bathroom windows scope. We then use opening configuration to coordinate privacy glass, opening restrictors, ventilation, sill detailing and internal sealing, and we confirm fixed and opening sections against ventilation, access and furniture or worktop positions, with frame alignment kept as the lead check for this bathroom windows scope. Before closure, trickle vents is reviewed and we integrate background ventilators with the frame head, room use and internal finish where specified, with frame alignment kept as the lead check for this bathroom 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 alignment kept as the lead check for this bathroom windows scope. Together these checks support bathroom glazing coordinated around privacy and controlled ventilation.