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Cost of Installing Double Glazed Windows Double glazing costs can vary depending on the options. For instance, you could opt for aluminum-framed windows with the gas argon or krypton to boost the efficiency of energy. Window units alone can cost between $300 and $1500 in the average. Other costs include labor and permits. Cost of Materials There are many factors that influence the cost of double glazing. The frame material and the window design are the most important. The most popular frame materials