UPVC Single Hung Sash Windows has one gliding sash which operates by sliding the sash vertically past a fixed pane. Tilt-out lower sash makes cleaning and inspecting weatherproofing strips simple and convenient. The standard sash window has a UPVC frame, window latch, snap on insect screen, constant force (spring) balance hinges and a single, glazed, grey anti-sun glass. These popular and traditionally styled windows offer medium to high ventilation and are ideal for high traffic areas such as adjoining walkways, porches and patios.