- Single-Pane: Windows with just one layer of glass. This type of window offers little protection against heat and cold.
- Double-Pane Insulated: Windows which have a layer of inert gas sealed between inner and outer pains. The gas that is typically used in this type of window is either argon or krypton. The gas is a poor thermal conductor, so it slows the passage of heat through the glass, eliminating the need for storm windows. Most new windows sold today are dual pane.
- Triple-Pane Insulated: Windows which seal two layers of gas within three panes of glass. This type of window is generally used in the northern climates and is also installed in homes near highways to help reduce noise. These windows tend to more expensive because of the extra piece of glass, which also makes the sash very thick and heavy.
- Low-E: Low-E stands for Low-Emissivity coating, which is an invisible layer of metallic oxide that reduces the amount of heat that passes through the glass. The majority of windows sold today offer this type of coating.
You can find this glass in:
- Double Hung
- Casement
- Sliding
- Awning
- Hopper
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