Kaizen Windows & Doors plans security-led window upgrade in Great Harwood around details that are harder to correct after finishing, with frame position kept as the lead check for this security-focused windows scope. The first control is frame position, and we set the new frame at a position that works with the reveals, sill and external finish, with frame position kept as the lead check for this security-focused windows scope. We then coordinate perimeter sealing through locking points, hinges, keeps, handle operation and frame alignment and form a continuous weather-resistant seal around the external frame perimeter, with frame position kept as the lead check for this security-focused windows scope. Locking Points is checked before closure, while sash compression is included in final handover. We align sash locking points and keeps so the window closes evenly around the frame and set sash compression evenly enough to support sealing without creating heavy operation, keeping the installation focused on replacement windows with hardware performance checked as part of final adjustment, with frame position kept as the lead check for this security-focused windows scope.