doubleglazing

Double glazing refers to a window construction consisting of two panes of glass separated by a gap filled with air or an inert gas. This gap acts as an insulator, reducing heat transfer between the inside and outside of a building. The primary benefit of double glazing is improved thermal performance. It helps to keep homes warmer in winter by preventing heat from escaping and cooler in summer by reducing heat gain from the exterior.

The sealed gap between the panes also contributes to sound insulation, minimizing noise pollution from external sources. This can create a more peaceful living environment. The construction typically involves a frame, often made of uPVC, wood, or aluminum, which holds the two glass panes in place. The edges of the glass are sealed to maintain the integrity of the gas-filled gap, preventing moisture ingress and thermal bridging.

Over time, advancements in double glazing technology have led to improved efficiency. Low-emissivity (low-E) coatings can be applied to the glass surfaces to further enhance thermal performance by reflecting heat radiation. Inert gases like argon or krypton, which are denser than air, can be used in the gap to provide even better insulation. Triple glazing, which involves three panes of glass with two gaps, offers a higher level of insulation but is generally more expensive and can add significant weight to window units.