Glass Glossary

Double Pane Windows


Last Updated: November 23, 2023

Double pane windows, also known as double-glazed windows, consist of two layers of glass utilizing a multilayered silver LoĒ spectrally selective coating which reflects long wave infrared radiation and allows visible light to pass through. The panes of glass are separated by a space that is typically filled with an inert gas, such as argon. The LoĒ coating reflects heat out of the home in the summer and reflects the heat back into the home in the winter, saving energy and providing year-round comfort. The denser argon gas acts as a better insulator than air, further helping to reduce the transfer of heat between the interior and exterior of a building.

The space between the two panes of glass is typically sealed with a spacer, which in Cardinal’s case is made from a low conductance, thin stainless steel. This space also contains a desiccant, which helps to prevent moisture buildup between the panes.

Double pane windows offer several advantages over single-pane windows. They provide better insulation, resulting in greater energy efficiency, comfort, and reduced heating and cooling costs. They also help to reduce outside noise, providing a quieter indoor environment. Additionally, double pane windows reduce the risk of condensation, which can lead to mold growth and damage to window frames.