Why will my uPVC door not lock?
Why will my uPVC door not lock? Cold Weather – uPVC Door Lock Won't Lock or Shut Properly Cold and freezing weather will cause a uPVC door to not lock or close properly, this is due to contraction of the uPVC, the shrinking can only be 1mm or 2mm but is enough to stop your door from locking. Why is the lock on my door not working? Door locks go hand in hand with the keys that match them, so if a key has been damaged, it won’t be able to lock or unlock your door. A loose doorknob could...