For this top-hung windows project in Thornton-Cleveleys, opening checks, frame fitting and finishing are treated as one sequence. Internal Making Good leads the review, so we repair or finish internal reveals, sill zones and decoration interfaces around the new frame, with internal making good kept as the lead check for this top-hung windows scope. We use reveal dimensions and drainage paths around head clearance, hinge line, handle reach, restrictors and weather seals, ensuring we check internal and external reveal depths so trims, plaster and handle clearances can be coordinated and keep designed frame drainage routes clear through installation and external finishing, with internal making good kept as the lead check for this top-hung windows scope. The last technical check is locking points; we align sash locking points and keeps so the window closes evenly around the frame, with internal making good kept as the lead check for this top-hung windows scope. This supports top-hung windows configured around ventilation and practical operation.