Visual of Typical IGU Construction
An insulating glass (IG) unit is make up of two or more parallel
sheets of glass, held apart by alumunium spacer bars, to make
up a windows, or facade.
The spaces in between the glass sheets are usually filled
with dry air to avoid condensation that could result from
temprature differences between the inner and outer sheets.
The main purpose of these spaces is to improve the insulating
characteristics of the IG units. either against heat (thermal
insulation) or against noise(noise reduction). In certain
cases dry air is substituted with a specific gas.
the insulating characteristics itself are affected by the
between the glass sheets
air, or type of gas used to substitute air
ranges cover the following :
unit with normal float glass
unit with safety glass
unit hard coat reflective glass
unit with soft coat
unit with special gas
can be produced with one or more spacer bars as required.
Apart from that, IG units can be combined with Georgian Bars
(decorative divided glass), to give that special looks.
As an illustration the average noise reduction of windows
using various material compares as follows :
Single glass sheet
IG unit 4/12/4 mm
IG unit 4/12/4 mm with special gas
IG unit, with laminated glass (4-1.52-4)/18/8
mm and special gas
average city noise level ranging around 65dB - 75dB, the maximum
recomended noise level at hospitals of 38 dB could never be
reached, or even be approximated, without the use of IG units.
with glass sheets of differing thickness, can also effectively
of IG units also ensures safety. All the glass used is of
safety glass material, which is achieved either by heat strengthening
or the use of laminated glass. Hence, IG units for windows,
if combined with the right hardware, provide, next to thermal
insulating properties, also a safety aspect. Or, become even