On this privacy-glass windows project in Chorleywood (Lancs), hinge positions is the first installation control and we set opening sashes so hinge direction and swing work with the adjoining room, with hinge positions kept as the lead check for this privacy-glass windows scope. Kaizen Windows & Doors links ventilation to glass selection, opening style, ventilation, frame dimensions and room use, making sure we coordinate window opening and background ventilation with the room's intended use, with hinge positions kept as the lead check for this privacy-glass windows scope. We also review opening survey before making good and check the existing opening, frame position and surrounding finishes before final dimensions are confirmed, with hinge positions kept as the lead check for this privacy-glass windows scope. Finally, fixing points is checked so we can position frame fixings to suit the opening, frame profile and surrounding substrate, helping deliver privacy glazing coordinated with the opening style and ventilation requirement, with hinge positions kept as the lead check for this privacy-glass windows scope.