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How to Install a Double Glazed Door Handle Installing double-glazed door handles isn't difficult If you're willing to put in some effort and have the necessary information. It is crucial to choose the correct replacement handle and also note the PZ and whether it's sprung or not. uPVC Door Handles There are many different types of uPVC handles to choose from and some are better suited for specific doors than others. Some are designed for aesthetic reasons while others are more focused on s