The window frame material, window coating, window gas and the window's insulation affect the price of home windows. The price also depends on whether the window is made from triple-, double- or single-pane glass.
Common window frame materials for home windows include fiberglass, vinyl and wood. Fiberglass frames are the most expensive option, as they are strong and energy efficient. Vinyl is generally cheaper, though there are some high-end varieties. Wood is also cheaper than fiberglass, though it is disadvantageous as it is affected by moisture changes.
In general, more energy efficient windows, measured by how well they trap cool or warm air inside the home, are more expensive. Windows panes that have low-emissivity coating are about 15 percent more expensive than regular windows, but this coating may reduce energy loss by up to 50 percent.
Single-pane windows are common in older houses. The least expensive, they are also the least energy efficient. Double-pane glasses are more energy efficient. Triple-pane glasses are the most expensive and are also quite energy efficient.
Window gas is denser than air and is injected between the panes of triple and double pane windows to reduce the transfer of cold and hot air. Clients can choose between no air, krypton gas and argon gas. Window frame insulation also affects the cost of home windows. Windows that have no insulation are less expensive compared to windows that are filled with high-quality insulating materials.