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J-Channel
Installed or build in to the side of a window or door, this channel is designed to accommodate the ends of siding pieces to provide a finished appearance. [top]
Jalousie
Window made up of horizontally mounted glass louvers or slats that butt with each other tightly when closed and rotate outward when cranked open. [top]
Jamb
The main vertical members forming the sides of a window or door frame; or, the vertical surface of a rough opening. [top]
Jamb Depth
Width of a window or door from the interior to the exterior of the frame. [top]
Jamb Liner
In a modern double-hung window, a track installed inside the jambs on which the window sashes slide. [top]