Transom

A transom is a transverse horizontal structural beam or bar, or a crosspiece separating a door from a window above it. It is paired with a mullion that divides a window’s upper part into additional lights. When transoms are positioned, generally they will be placed above head height to avoid obstructing the view from a window.

Channel

A channel is a glass run groove, mostly made of rubber or plastic, that is found around windows. Its primary purpose is to provide a seal for the window.

Spacer

The Window spacers are materials that are used to hold the glass in place between window panes. Additionally, window spacers also help keep a tight seal around the edge of the glass panes. A tight seal improves the efficiency of windows by preventing the escape of insulating gases (krypton or argon) from escaping.

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