doorshingeslock
Can someone help me out and let me know what these are called?
I'm looking on a DIY site to order one but can't work out what these are called to be able to find them.
As you can see in the picture, it's loosened over the years and now doesn't pull the door tight (it also looks broken to me as the bottom part is 'inside' the top – can someone confirm?), so I need to get a replacement.
Barrel Hinge:
But note that there's nothing intrinsically wrong with fitting a completely different type of hinge.
You obviously need hinges explicitly intended for outdoor use. Not like these
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.
Best Answer
I think it's a push latch or a push to close latch for sliding doors- like the one pictured below: