Double glazed windows
Double glazed windows (also called double-pane windows) are windows made with two glass panes separated by a sealed air gap or an inert gas layer. This trapped space reduces heat transfer, helping keep indoor temperatures more stable and improving energy efficiency. The panes are typically held apart by a spacer and th
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What “double glazed windows” means
Double glazed windows (also called double-pane windows) are windows made with two glass panes separated by a sealed air gap or an inert gas layer. This trapped space reduces heat transfer, helping keep indoor temperatures more stable and improving energy efficiency. The panes are typically held apart by a spacer and the unit is sealed to limit moisture and drafts between the layers.
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Key benefits and common features
Common advantages include better insulation (lower heating and cooling costs), reduced outside noise, and improved comfort near windows. Many double glazed units also use low-emissivity (low‑E) coatings to reflect heat back into the room. Some models include thicker glass, laminated glass, or different gap sizes to enhance sound reduction or performance.
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What to look for when choosing
When shopping, check the window’s energy rating (such as U‑value for heat loss and SHGC for solar heat gain), the type of gas (if any), and whether the unit is properly sealed. For noise reduction, look for laminated glass or acoustic glazing. Installation quality matters: even high-performance windows can underperform if fitted poorly.
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