Window performance on this high-level windows installation in Much Wenlock depends on more than the frame profile. We start with internal sealing and close the internal frame perimeter cleanly before trims or making-good work is completed. gaskets is then coordinated through handle position, restrictors, opening angle, installation access and internal reveal, so we check glazing and sash seals for continuous seating before final handover, with internal sealing kept as the lead check for this high-level windows scope. Before final finishing, we review final checks and open, close, lock and inspect each installed window before the work is handed over, with internal sealing kept as the lead check for this high-level windows scope. We finish with sill level and coordinate the frame base with the internal sill or window board and the external weathering detail, supporting high-level glazing configured for practical controlled ventilation, with internal sealing kept as the lead check for this high-level windows scope.