For this casement windows project in Runcorn, opening checks, frame fitting and finishing are treated as one sequence. Keeps leads the review, so we adjust keeps to achieve consistent engagement without making operation unnecessarily stiff, with keeps kept as the lead check for this casement windows scope. We use trims and frame position around opening dimensions, hinge positions, handle access, locking points and clearances, ensuring we coordinate internal or external trims with reveals, frame position and adjoining finishes and set the new frame at a position that works with the reveals, sill and external finish, with keeps kept as the lead check for this casement windows scope. The last technical check is frame alignment; we check the frame for line, level and square before glazing and final tightening. This supports casement windows that open cleanly and suit the intended ventilation pattern.