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Cost of Installing Double Glazed Windows Double glazing costs will vary depending on your choice of alternatives. For instance, you could choose to install aluminum-framed windows using argon or krypton gas to increase the efficiency of energy. Window units on their own can cost between $300 and $1500 on the average. Other expenses include labor, removal of old windows, permits and upgrades. Cost of Materials The cost of double glazing is determined by a number factors. The frame material as well as th