When replacing a UPVC Door Lock Mechanism its important to measure the existing door mechanism correctly, this will then enable you to identify a replacement mechanism.

The key measurement you need to obtain is the backset. The backset is the distance from the front of the faceplate to the centre of the euro cylinder hole cut out.

In the video below we explain how to measure the backset on your existing UPVC Door Lock Mechanism:

Of course if you are still not 100% sure and need more advice you can email our team, include as much information as possible and we will do our best to advise you on undertaking the repair.

Purchase: Multipoint Mechanisms For Upvc and Composite Doors