For draught-reduction window replacement in Whaley Bridge, the technical sequence begins with opening configuration, so we confirm fixed and opening sections against ventilation, access and furniture or worktop positions, with opening configuration kept as the lead check for this draught-reduction windows scope. We then use ventilation to coordinate frame fit, gaskets, locking compression, perimeter seals and reveal condition, and we coordinate window opening and background ventilation with the room's intended use, with opening configuration kept as the lead check for this draught-reduction windows scope. Before closure, final checks is reviewed and we open, close, lock and inspect each installed window before the work is handed over, with opening configuration kept as the lead check for this draught-reduction windows scope. The handover also covers sill level; we coordinate the frame base with the internal sill or window board and the external weathering detail, with opening configuration kept as the lead check for this draught-reduction windows scope. Together these checks support a tighter window installation with frame and sash sealing checked together.