Laminated glass 
Annealed glass. Annealed glass is the basic flat glass product that is the first result of the float process. It is common glass that tends to break into large, jagged shards. It is used in some end products and often in double-glazed windows. Glazing refers to the glass in a window or door and the act or process of fitting a window with glass. There are many different glass types and treatments available. Assembled below are descriptions of the most common glass types. There are many commercial buildings with punched openings that use either standard or custom-manufactured units. A series of units can be placed together with intervening mullions to create a window wall with a larger expanse of glazing more commonly associated with curtain walls and storefronts. Manufactured units can be made with many frame materials, including aluminum, wood, vinyl, fiberglass or other composites. Types of Glass. Glasses may be devised to meet almost any imaginable requirement. There are many different types of glass with different chemical and physical properties and each can be made by a suitable adjustment to chemical compositions. Similar to a glass curtain wall, a storefront is a system of doors and windows mulled together as a composite structure. Storefronts are typically designed for high use and strength. A storefront system is usually installed between floor and ceiling on the street level of a building. Most popular glass types can be laminated and laminated glass is available in Clear, Tinted, Reflective and Low E glass types. Laminated glass is a popular choice for residential and commercial windows and doors.
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what type of glass are commercial windows made of