Window & Door Terms - T

Window & Door Terms - T

Tempered Glass

Type of safety glass that undergoes a special firing process. It is designed to break in tiny fragments of glass.

Trapezoid

A geometric shape with four sides and two or three right angles. The right angle sides may not be of equal length. Two sides are connected by a diagonal angle.

Threshold

The bottom metal and/or wood section located at the bottom of a door frame. The threshold is designed to seal with the bottom of the door panel when in the closed position.

Tilt Key / Swivel Key

A metal or plastic piece attached to the upper corners of a storm insert. The piece is designed to hold the insert in the storm door or window frame and guide the insert up and down the frame tracks.

True Divided Lites

Individual panes of glass set in a frame of a window sash or door