Window Terms Glossary

Jamb.  A vertical member at the side of a window or door frame.

Jamb depth: Width of the window frame from inside to outside.

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Jamb liner:  The plastic or metal track installed in the jambs of a double hung window in which the window sash slide.

Jalousie windows: A window composed of overlapping narrow glass, metal or wood louvers, operated by a  crank handler  for adjusting the louver angles

J-Channel: is used to trim out the ends of siding panels where they meet a door or window and to cover cut edges of panels around windows and doors.