See "Thermally toughened glass".

See Patterned glass.

A type of metal frame that incorporates an isolating material of low thermal conductivity located between the inner and outer parts of the frame in order to reduce the rate of heat loss through the frame.

See "Thermal stress".

The term used to describe the internal s tresses created when glass is subjected to variations in temperature across its area. If the temperature differentials in the glass are excessive, the glass may crack. This is referred to as thermal breakage or fracture.

Double-glazed units provide thermal insulation. See also "enhanced thermal insulation" and "Document L".

Glass that has been subjected to a controlled heating and cooling process, in order to significantly increase its resistance to mechanical and thermal stress. Through the thermal toughening process, the glass attains its safe-breakage characteristics. See SGG SECURIT.

The actual size of an opening into which glass is to be glazed and is measured from the rebate platform.

See Body-tinted glass.

A coloured plastic or resin sheet between two or more panes of glass.

See Solar factor.

Glass that has been subjected to a controlled heating and cooling process in order to significantly increase its resistance to mechanical and thermal stress. Through the thermal toughening process, the glass attains its safe-breakage characteristics.

Transmitting light but obscuring clear vision.

A horizontal framing bar between glass panes. It can also be used to refer to a fanlight over a door.

Clear, permitting vision