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How to Replace a UPVC Door Lock If you recently moved into a new home or suffered a burglary at your home and you need to change the locks on your doors is an important step in restoring security. The process isn't as complicated as it might appear. All it takes is a bit of preparation and the right tools, and a locksmith's visit will be avoided. Identifying the issue It's important to recognise the signs that you can tell if a uPVC door lock is going wrong. If you're having difficulty turning the handl