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How to Replace a UPVC Door Lock If you recently moved into a brand new property or had a break-in and you're looking to change your locks for your door, it is an important step in regaining security. It's not as complicated as it might seem. All you need is a bit of preparation and the right tools and a locksmith's visit will be avoided. Identifying the Problem It is essential to identify the signs of a uPVC lock that is not working properly. If you're having difficulty turning the handle, or you h