For single-window replacement in Ripley, the technical sequence begins with packers, so we support the frame at suitable points so fixing does not pull it out of line, with packers kept as the lead check for this single-window replacement scope. We then use internal sealing to coordinate existing opening, reveals, sill, external finish and internal making good, and we close the internal frame perimeter cleanly before trims or making-good work is completed, with packers kept as the lead check for this single-window replacement scope. Before closure, trims is reviewed and we coordinate internal or external trims with reveals, frame position and adjoining finishes, with packers kept as the lead check for this single-window replacement scope. The handover also covers surface protection; we protect floors, worktops and nearby finishes while removal and installation work is carried out, with packers kept as the lead check for this single-window replacement scope. Together these checks support a focused replacement with the new frame integrated cleanly into the existing opening.