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Air infiltration
This is a general term that describes the values of air that leaks from the exterior to the interior..
Air leakage rating
A measured value of the rate of air escaping around a window, door, or skylight in the presence of a..
Air Space
The space formed by the spacer bar between two (or more) panes of glass in the production of IG unit..
Blister
A bubble trapped inside of glass, or any other gaseous inclusion present inside glass. Generally, in..
Blast Resistant Glass
Shards of glass flying through the air cause many deaths and injuries from a bomb blast. In a bomb b..
Anti-Reflective Glass
Anti-reflective glass is float glass with a specially designed coating that reflects a very low perc..
Argon Gas
Replaces the air between a double glazed unit. Described as being a heavy gas, it is relatively chea..
Bent Glass
Bent glass is normal glass that has been curved with a special process. It can be used for external ..
Blowpipe
Usually an iron or steel tube used for forming glass by means of blowing into it. It is usually 5 fe..
Brewster fringes
Brewster fringes are a visual effect that appears as a sort of “oily” rainbow on a doubl..
BTU
The British thermal unit (BTU or Btu) is a unit of energy used in the United States, particularly in..
Caulk
A generic term used to describe a substance used to seal air infiltration points between fixed objec..
Causes of Glass Surface Damages
To avoid glass damage, the surface must be protected during shipment and storage. Appropriate handli..
Cavity
General term that refers to the space between panes of glass. The term cavity is used mostly in refe..
Cavity in IG
The term cavity refers to the space formed by the space bar between the two (or more) panes of glass..
Chemical durability
General term describing the lasting quality of glass while attacked by different chemical substances..
Condensation
Condensation is a very common phenomenon in everyday life. Although it doesn't have lasting effects ..
Curtain Wall
Curtain wall is a term used to describe a building façade that does not carry any dead load f..
Depression Glass
The Great Depression in the United States was a time of severe financial problems for the majority o..
Dew Point
The dew point is the temperature to which a given parcel of air must be cooled, at constant barometr..
Digital Printing on Glass
Digital printing technologies have advanced, and new systems and inks are becoming available that of..
Double Skin Facades
In recent years, the use of double skin facades, sometimes referred to as a "building in a buil..
Drained glazing
Any type of glazing in which any water that enters the system is drained out. This can be done by co..
Dry Glazing
Also called compression glazing, a term used to describe various means of sealing monolithic and ins..
Edge Seal
The hermetic seal around the edge of an insulating glass unit. The purpose of this seal is to preven..
EVA interlayer
EVA stands for ethylene vinyl acetate, a copolymer resin used in the production of laminated glass a..
Fenestration
Fenestration is the arrangement and proportioning of windows, used by modern writers for the decorat..
Glass Absorption
Energy that is not transmitted through the glass or reflected off its surfaces is absorbed. Once gla..
Glass Thickness Measurement Laser
For glass thickness, just press a button on the laser tool and read the results on the display. The ..
Heat Loss
Heat loss is a phenomenon that occurs in the colder winter months, when the average exterior tempera..
Heat Gain
Heat gain is a phenomenon that occurs in the warmer summer months, when the average exterior tempera..
Inert Gas Window Fills
An improvement that can be made to increase the performance of IG units is to reduce the conductance..
Electrically Heated Glass
Electrically heated glass is a laminated glass, incorporating almost invisible electrically conducti..
Helios Project
The new solar plane named Helios has reached an altitude of 100.000 feet and set a new record for su..
How To Save Energy With Windows
Building heat loss means increased energy costs. Much energy wasted occurs in the form of heat escap..
Insulating Glass
Insulating glass is a multi-glass combination consisting of two or more panes enclosing a hermetical..
Krypton Gas
An inert (nonreactive), odorless, colorless, nontoxic gas that is approximately 12 times more dense ..
Laminated Glass
Laminated glass is a combination of two or more glass sheets with one or more interlayers of plastic..
Low-E Glass
Low-emission glass (Low-E) is a transparent to visible light and opaque to infrared radiation glass...
Mastic
Mastic is a type of tile adhesive. Mastics are widely used throughout the construction industry.&nbs..
Point-Fixed Glass
Fully glazed façade systems are currently very popular with architects and investors for thei..
Primary Seal
A term used in the production of IG units in reference to a butyl-based sealant applied to the edges..
Hermetic Seal
An edge seal used in the process of assembling an IG unit. The main purpose of the hermetic seal is ..
Smart Glazing
Smart glass or smart windows in its application to windows or skylights refers to electrically switc..
Sound Insulation
The need to restrict outside sound is not only a matter of environmental protection but, principally..
Space Bar
Space bars are used to form an IG unit.  They are placed between two sheets of glass to hold th..
Sputtering Technology Process
The deposit of thin films is often used to change glass properties. For example, the optical propert..
Tempering
Toughened or tempered glass is glass that has been processed by controlled thermal or chemical treat..
Thermal Stress
Window glass is heated and cooled by visible and invisible (infrared) radiation from the sun and oth..
Thermally Toughened Glass
The thermal toughening of glass is employed to obtain a glass sheet with high surface tension in ord..
Toughened Glass
Toughened glass is also called “tempered glass.” It is made by a process of heating glas..
Triple Glazing
Three layers of glass separated by air spaces to give improved thermal or acoustic insulation. As wi..
U-Factor
The rate of heat loss is indicated in terms of the U-factor (U-value) of a window assembly. The insu..
Visible Light-Spectrum
The visible spectrum (or sometimes called the optical spectrum) is the portion of the electromagneti..
What Makes Glass Transparent?
In general, most liquids and gases—water, air, natural gas, cooking oil, or rubbing alcohol&md..
Wind Pressure
Wind has pressure due to its velocity. This pressure is calculated from the equation Vp = 0.6V²..