For white uPVC window replacement in Aigburth, the technical sequence begins with internal making good, so we repair or finish internal reveals, sill zones and decoration interfaces around the new frame, with internal making good kept as the lead check for this white uPVC windows scope. We then use frame position to coordinate frame colour consistency, trims, sealant, external finish and hardware, and we set the new frame at a position that works with the reveals, sill and external finish, with internal making good kept as the lead check for this white uPVC windows scope. Before closure, frame alignment is reviewed and we check the frame for line, level and square before glazing and final tightening, with internal making good kept as the lead check for this white uPVC windows scope. The handover also covers glazing beads; we check bead seating and corner joints after the glass is installed. Together these checks support a consistent white window package with perimeter finishes coordinated around the frames.