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How to Change a Double Glazing Door Lock If you've broken a window lock, repairing it is a relatively easy DIY project. It is essential to follow the correct steps to make sure that your double-glazed windows are secure and safe. This example estimate covers the basic tasks that are performed in a way that is easily serviceable by trade professionals, employing common, IN STOCK materials and products. The actual cost will be different. How to do it Window locks are frequently used and can get worn out o