PVC Window Louver is a series of horizontal pieces of wood, glass, aluminium or other material that is fitted to the window frame, that may be adjusted to rest open to allow breeze and light to pass through, or closed to completely resist the elements. PVC Window Louver is often made of aluminium that is used to build some louvre systems. These are built using modern materials like aluminium, metal, glass, copper, stainless steel or titanium.