Glass that is used as a building material. It is most typically used as transparent glazing material in the building envelope, including windows in the external walls. Glass is also used for internal partitions and as an architectural feature. When used in buildings, glass is often of a safety type, which include reinforced, toughened and laminated glasses.

Tempered Glass

Tempered glass is made from normal annealed glass via a thermal  tempering process in which the glass is subjected to heat till its softening point and then rapidly cooled. This gives the glass its strength. A fully tempered glass is 4 to 5 times stronger then an annealed glass of similar thickness. A fully tempered glass is regarded as a safety glass and when it breaks it disintegrates into small blunt pieces which greatly reduces the chances of injuries and if there are any then they are superficial in nature.

A fully tempered glass is used in most modern glass facade, where glass strength is required. A fully tempered glass is recommended for windows that are on high floors or skylights where people are required to stand on top for cleaning. Also areas where risk of thermal breakage or impact breakage is high, fully tempered glass should be used so as to avoid risk of injury. Glass strength is also required in point fixed glazing, bolted and patch fittings.

PVB Laminated Glass

Laminated glass is a sandwich made of one piece of plastic Poly Vinyl Butyral between two or more glasses. The PVB sticks with the glass, forms chemical as well as mechanical bonds.

When laminated with annealed glass, the layer maintains the geometric integrity of the pane in case of breakage.

Also it gives acoustic insulation as well as gives protection against damage caused due to UV radiation because it cuts almost 99% of UV radiation present in the sunlight.

Insulated  Glass Units

IGUs’ are basically multiple layered glass panes that have very dry air or inert gas between the glass panes. The glass panes are hermetically sealed.

Any use of two thick nesses of glass, separated by an air space, within an opening, to improve insulation against heat transfer and/or sound transmission.

In factory-made double-glazing units the air between the glass sheets is thoroughly dried and the space is sealed airtight, eliminating possible condensation and providing superior insulating properties.

Very dry air is a poor conductor of thermal heat, and an IGU provides excellent thermal insulation.A typical 6mm clear glass + 12mm air-gap + 6mm clear glass IGU provides a U-value of 2.8 Watts/m2, often significantly lower than many low-emissivity glasses.Contrary to popular opinion IGUs do not provide good acoustic insulation.