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UPVC French Door Lock Replacement It takes only five minutes to change the barrels of your locks on uPVC doors. You might need to replace the lock barrel for a number of reasons. The key may be lost or the houseshare has ended and the locks are no longer needed or they simply don't work as they ought to. Fixing a loose handle A door handle that isn't in good condition can be annoying but it can also pose a security threat. It's usually a simple fix to tighten the screws, however, it could be more