I've had a break-in so looking to improve my security. I have what I believe is called a multi point lock – see pic. Basically when you lock the door there are pins at the top and bottom of the door that go into the frame, in addition to the dead bolt.
I have ordered a replacement Euro cylinder (this is in Ireland) that resists "bump" and "snap" (Avocet ABS MK3 Euro Cylinder) but was wondering if brute force was applied to the handle (say using a pipe as lever), could the lock be forced open this way?
Also, I want to add some internal bolts to the door, top and bottom. Given that the multi lock runs the entire length of the door, how near to the edge could I put wood screws in without hitting the locking mechanism? I don't want to take it out to look just in case I have problems getting it back in!
Best Answer
The "no screw" locations will vary from lock to lock. The typical "multi-point lock" has 3 latches that interface with the side of the door frame like this:
As you can see, screwing anywhere at the top or bottom of the door should be fine.
If you do have a type of lock with bolts that go into the header and door sill, I would expect the "boxes" to be smaller, but still present in the area of the bolts. Measure from the door frame to the far side of the bolt, and add 20-30mm to that for your no-screw zone. That should put you beyond any hardware and into good solid wood.
Of course, if you can find a manufacturer for your lock set, Google it up and see if you can get a picture or installation instructions so you know exactly what to avoid.