How Exactly Does Double Glazing Work?

The word “double glazing” is familiar to most individuals at some time in their life. Double glazing offers superior thermal efficiency over single glazing, but what is double glazing, and how does it function? First, you must understand what you are getting for your house. So we have taken the time to explain double glazing before you install any double-glazed windows in Adelaide or elsewhere. 

How does double glazing work?

Double glazing works by separating two temperature zones with an air space that prevents heat transmission (inside and outside).

A spacer bar is between the two panes of glass in an insulating glass unit (IGU). The spacing between the panes (often 6-12mm) generates an air gap that slows down thermal transmission (hot or cold) through conduction. This air gap does not “trap heat” but impedes heat passage to lessen heat loss.

Since air cannot flow in the tiny space between the panes, air convection gets delayed, and heat transmission reduces.

How can the installation of double-glazed Windows Minimize heat loss?

Double glazing lowers heat loss via the thermal cushion and insulation of the air enclosed inside the sealed unit. 

When cold air collides with the outer pane of glass, the glass transmits the temperature to the Argon gas layer. Argon gas has a 34% lower thermal transfer rate than air and hinders heat transmission between two temperatures that vary by more than one degree.

Thus, the Argon layer conveys less of the temperature differential to the inner pane of glass, which maintains a temperature between the Argon glass and the ambient temperature.

Similarly, when heated air from the room encounters the internal pane of glass, the Argon gas delays the transmission of heat from the inside to the outside. And the room retains its heat. So, if you want to install double-glazed windows, several companies are there to install double-glazed windows in Adelaide at very reasonable prices.

With a double-glazed unit, the outside and interior panes of glass will have different temperatures. Grandview Windows is a well-known company for providing excellent double-glazing installation services.

How can double glazing lower noise levels?

Sound is an energy that travels in waves, similar to ocean waves, causing the air molecules and anything it comes into touch with to vibrate. For example, when sound waves strike the glass, the glass vibrates at the frequency of the sound wave and sends the vibration to air molecules on the other side of the glass.

When a sound wave travels, dumb things absorb its energy, therefore lowering its frequency as it passes by. It is why, if you place your ear against a wall, you can hear people speaking on the other side, but if you move away from the wall, you cannot.

Double glazing minimizes noise by absorbing part of the energy and decreasing the frequency of vibrations as they travel through the glass and Argon gas layer. As a result, as a sound wave travels through a window, the sound wave gets somewhat wasted, and the noise reduces.

To reduce noise as much as feasible, however, it is necessary to disrupt the sound waves and frequencies as they travel through a material. It is possible by mixing glass of varying thicknesses nearby.


Double glazing uses two panes of glass inside a window or door while leaving an air space between them. Without double glazing, a glass product would consist of a single pane of glass. However, having a single pane of glass is less than ideal since glass is an excellent heat conductor, which means that heat may easily pass through it. Consequently, a significant portion of a room’s heat escapes through the window’s single pane of glass.