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Paddy's DIY – The 6 Steps To Correctly Measure A Window Espag Lock
Another great instructional video brought to you by Paddy's DIY

In this video I’m going to show you the 6 steps to correctly measure a window espag lock. The best and easiest way to check all the aspects and sizes of the lock is to remove it from the window. Check out my other videos guides on how to open a broken window lock and how to replace a window espag lock

The first thing to check is for a manufacturers name or logo. This will usually be stamped on the faceplate of the lock. In some cases this can be stamped on the gearbox of the lock. Sometimes there will be no name or logo at all.

The second thing to check is if your lock gearbox is inline or offset. An inline lock will have the gearbox positioned in the centre of the faceplate. An offset lock will have the gearbox positioned to one side of the faceplate. This is really important to check, because an inline lock will not fit in place of an offset lock.

The third thing to check is the backset of the window lock. This is basically how deep the lock is recessed into the window. This is measured from the edge of the lock back to the centre of the screw holes or the centre of where the handle goes in. In some cases you will see the size stamped into the gearbox. The most common backset are 20mm, 22mm and 25mm.

The fourth thing to check is the overall length of the lock. Very straight forward, measure from one end to the other.

The fifth thing to check is the width and shape of the faceplate. Nearly all locks are 16mm wide as standard, but there are narrower locks used on old windows. Also the standard shape will be flat, but there are u shaped faceplates.

The sixth and final thing to check is the shape and size of the roller lock. The standard shape is mushroom shaped. Measure the height of the roller from bottom to top. The standard height is 8mm. Also check the diameter and inside diameter of roller.

So to recap. The 6 things to check are:
• The manufacturers name or logo
• Inline or Offset
• The backset
• The overall length
• The width of the faceplate
• The size and shape of the roller