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How to Install a Double Glazed Door Handle Double glazing door handles aren't easy to install If you're willing to work hard and have a basic understanding of the subject, it's not too hard. It's important to choose the right replacement handle, and note the PZ and whether it's sprung or not. uPVC Door Handles There are a variety of uPVC door handles that you can pick from, and some are more suitable for some doors than others. Some are specifically designed to be security focused whilst others are design