Sash or glazed windows: A sash window is a type of casement window in which the panels are fully glazed. The frame of shutter consists of two vertical styles, top rail and bottom rail. The space between the top and bottom rails is divided into small panels by means of small timber members placed horizontally and vertically. These timber members, known as sash bars or glazing bars are rebated to receive glass panels. Glass-panes are fixed to these sash bars either by means of putty or by timber beads commonly known as glazing beads secured to the sash bars by means of nails
Double hung window: This type of window consists of a frame and a pair of shutters, arranged one above the other, which can slide vertically within the grooves provided in the window frame. By the provision of such sliding the windows can be cleaned effectively and at the same time ventilation can be controlled effectively since the windows can be opened at the shutters open to the required level. The upper sash moves in the downward direction, thus opening at the top, while the lower sash moves in the upward direction thus opening at the bottom. Single-Hung window is much like their brother, the double-hung, these windows open by sliding up and down, but these feature a fixed top half.
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