An insulated glass unit is made up of two or more
layers of glass adhered together with a spacer in between. When a seal
fails, or glass is damaged, the sealed air in between the layers escapes
and moisture-laden air is drawn in. When this happens the window will
look dirty or foggy regardless of cleaning methods. This is caused by
the moisture that was drawn into the unit leaving mineral deposits on
the inner surfaces of the glass. The only way to solve this problem is
by replacing the glass insulated unit. An insulated unit can be made up
of clear glass, tempered glass, low-e, tinted, and pattern glass.
application is mostly used in situations where the glass unit acts as a
barrier separating the indoors from outdoors. Almost all of the glass
units used on the outside walls of residential and commercial units are
insulated. This reduces temperature transfer and helps save energy.