For side-hung windows in Prestatyn, the technical sequence begins with sash compression, so we set sash compression evenly enough to support sealing without creating heavy operation. We then use frame dimensions to coordinate hinge side, handle reach, opening clearance, locking points and reveal depth, and we confirm manufacturing dimensions against the surveyed opening before the replacement frame is ordered, with sash compression kept as the lead check for this side-hung windows scope. Before closure, packers is reviewed and we support the frame at suitable points so fixing does not pull it out of line. The handover also covers opening configuration; we confirm fixed and opening sections against ventilation, access and furniture or worktop positions, with sash compression kept as the lead check for this side-hung windows scope. Together these checks support side-hung windows with operation planned around the adjoining room.