Curtain Wall: Curtain walls are external walls, typically designed with extruded aluminum members, and in-filled with glass. This provides an architecturally pleasing building, as well as benefits such as day lighting. However, parameters related to solar gain control such as thermal comfort and visual comfort are more difficult to control .
Window walls: This is a favorite feature in modern architecture. Window walls span the slab heights and install between the slabs whereas curtain walls install in front of the slab. An entire wall of glass may be sectioned in various ways so some panels are fixed and other act as a window or door. A window wall is particularly desirable where the indoor and outdoor relationship is important.