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Cost of Installing Double Glazed Windows Double glazing costs can vary depending on the options. For instance, you can choose aluminum-framed windows that use Krypton gas or argon to boost energy efficiency. The window units themselves cost between $300 and $1,500 on average. Other costs include labor, removing old windows, permits and upgrades. Cost of Materials The cost of double glazing is affected by a variety of factors. The most important ones are the frame material and window design. In the U