Double glazing is a window system using two panes of glass separated by a sealed air or gas space for insulation.

Double glazing refers to a window or glazing system made up of two panes of glass separated by a sealed air or gas-filled cavity. This design improves thermal insulation by reducing heat transfer between the interior and exterior of a building, making it a common feature in modern construction.

In building applications, the space between the glass panes is often filled with air or inert gases such as argon or krypton to enhance energy efficiency. Double-glazed units also help reduce condensation on interior glass surfaces and provide improved sound insulation compared to single-pane windows.

From a construction and performance perspective, double glazing plays a key role in meeting energy codes and sustainability standards. Proper installation, edge sealing, and frame compatibility are critical to prevent air leakage and maintain long-term performance. Double glazing is widely used in residential, commercial, and institutional buildings to improve comfort and reduce heating and cooling costs.

The concept of double glazing dates back to the 19th century, but it became mainstream only after energy efficiency standards tightened in the late 20th century.

• Double Stud Wall
• Double Top Plate
• Glazing