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Windows are complex mechanisms made up of many components. If something goes wrong, familiarizing yourself with the different parts and their roles can help you identify the problem and find the best way to fix it. Here is a brief introduction to the different types of windows.

Apron. Horizontal decorative component under the threshold.

Argon. There is a small gap between each layer of a double-glazed window. Argon is a harmless gas used to fill these gaps.

Extension arm or scissor. A bar attached to a beam, rail or track that expands or contracts to open or close a casement window.

Glazing. This term refers to the number of layers of glass in a window. Double and triple glazed windows are more energy efficient than single glazed windows.

Head casing and side casing. These components form the visual window frame and cover the space between the wall and the sash.

Jambs. A device attached to the side of the window frame to secure the sash.

Latch or lock handle. Window locking devices. Closes the window by compressing the insulating strip between the window and the sash.

Muntins, grilles or glazing bars. A strip of decorative material that divides the glass and gives the appearance of more than one piece of glass.

Operator. Crank handle used to open and close casement windows.

Pane. A single sheet of glass.

Rails. The horizontal part of the frame that joins the beam and rail. It secures the glass.

Sash. It is the entire window frame, including the sash, jamb and track.

Sill, or stool. Window sills are flat shelves under the window. They protrude into the window and sometimes outside the house.

Stiles. Stile and rail (kamachi) are vertical supports for the window frame on both sides of the window.

Weephole. Holes are drilled in the bottom of the rails that hold the glass in place to allow the water to escape.

WINDOW INSTALLATION AND REPAIR IN NORTHWESTERN CANADA

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