Aperture Glass Ltd designs, supplies and installs this slim, elegant aluminium internal door system. Aperture Aluspace can be made into sliding doors, swing doors, pivot doors and fixed screens. This system is not fire rated but it is used as a beautiful, Crittal look, cost effective internal room divider. Aperture Aluspace crittal style internal door screens, allow natural light to flood through the house. But it elegantly divides rooms.