On this dual-colour windows project in Irlam, frame position is the first installation control 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 dual-colour windows scope. Kaizen Windows & Doors links frame alignment to internal finish, external finish, trims, sealant colours and adjoining decoration, making sure we check the frame for line, level and square before glazing and final tightening, with frame position kept as the lead check for this dual-colour windows scope. We also review glazing beads before making good and check bead seating and corner joints after the glass is installed. Finally, opening survey is checked so we can check the existing opening, frame position and surrounding finishes before final dimensions are confirmed, helping deliver frame finishes coordinated separately to the interior and exterior appearance, with frame position kept as the lead check for this dual-colour windows scope.