Double glazing, an insulated glass unit, combines multiple glass panes in a single-window system. Some have three panes or double glazing, which has become more common due to higher energy costs. Partitions inside are separated by a spacer and a fixed layer of air or gas. The glass is then placed in the window frames that are wider to accommodate the two panes.
Double Glazing Advantages
Double-glazed windows are an ideal energy-efficient choice, with the added advantage of minimizing noise. The sealed air space between the two panels acts as an additional insulation layer. This additional thermal resistance reduces the amount of heat escaping. It also keeps your home at a more comfortable temperature.
Double glazing prevents unwanted heat from entering the house in summer. This extra insulation reduces your dependence on artificial heaters and air conditioners and ultimately lowers your energy costs. When you are close to a window, your comfort is also affected by the temperature of the glass. It is more difficult to transfer unwanted outside temperature with double glazing.
Double glazing also reduces condensation that can cause unhealthy mould growth. On the other hand, it is effective in reducing medium to high-frequency noise such as human voice. The difference in glass thickness between inner and outer glasses will further improve sound reduction.
Double-glazed windows are considered to be a safer choice when compared to single-glazed windows. Two layers of glass are much more difficult to break than one, and toughened or laminated glass can be chosen for even greater safety.
Double Glazing Features
The general gap between the panes in double-glazed windows is between 6 mm and 20 mm. A minimum spacing of 12 mm is recommended for optimum thermal performance. Alternatively, it is subjected to many tests for good acoustic control. Since the space between the panes in double-glazed windows is completely closed, it acts as an insulator and limits the transfer of cold air coming into your home. Thermal and acoustic performance can also be improved when gas fills this gap. The most used and preferred gas is argon, which has low conductivity properties to improve insulation. Double glazing units contain a separator, a metal or polymer strip that separates the two panes of glass. Typically, spacers act as a desiccant to remove moisture trapped in the air gap.
A wide variety of different glass types can be used in double glazing units to further increase energy efficiency and noise control. To improve acoustic performance, thicker laminated glass distorts sound waves while further reducing the amount of heat escaping. Windows should be considered as a whole. The chosen frame material can improve performance and also increase energy efficiency.
How well the gap is closed and the type of spacer used is also an important factor to consider. If the double-glazed unit is not properly sealed or the spacer does not contain sufficient desiccant, it can reduce performance. Therefore, condensation may occur on cold surfaces.