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Industry Terms

We've compiled and maintain a list of useful terms used in the glass fabrication industry. This comes from our vast experience in the glass production industry. There are links to articles, references, and images of glass production, production techniques, and common FAQs about ALL THINGS GLASS.


An arrangement of three or more individual window units, attached in such a way as to project from the building at various angles. In a three unit bay, the center section is normally fixed with the end panels operable as single hung or casements.


A compressible material placed in a joint before applying a sealant, to limit the depth of the sealant configuration. The material may also act as a bond breaker.


The same as bedding or bed glazing. The small bead of glazing material between the glass and the sash and on the opposite side of the glass from the face glazing. Also, the act of applying the back putty before placing the glass into position.


Polished or clear glass, 1/4″ thick. Wire mesh is embedded within the glass such that the glass will not shatter when broken. The wire pattern is available in many types. It is frequently used in skylights, overhead glazing, and locations where a fire-retardant glass is required.


Similar to a casement except the sash is hinged at the top and always projects out.


To provide an extremely hard non-corrosive oxide film on the surface of aluminum, by electrolytic action. The electrochemical process produces an anodic coating by conversion of aluminum into essentially aluminum oxide. Appearance depends upon both the alloy involved and the surface preparation. Anodic coatings may be transparent, of varying shades of silver, gray or brown, […]


To heat above the critical or re-crystallization temperature, then controlled cooling metal, glass or other materials to eliminate the effects of cold-working, relieve internal stresses or improve strength, ductility or other properties.


The amount of air leaking in and out of a building through cracks in walls, windows and doors.


That property of a coating or sealant which measures its ability to stick or bond to the surface to which it is applied.


To shim, level and plumb windows in required position.