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I am going to be building a set of custom interior French doors and would like one of them to latch into the door frame, while the other door is a normal door latch. However, I want the latching mechanism for the door frame to be operated by a door handle, rather than with those small levers at the top and bottom typically found on the door.

The reason for wanting one door to latch into the frame is simply so that the set of doors will remain closed if there is a cross breeze occurring between the rooms (which would want to push the doors open a bit).

Does anyone know a source for this kind of hardware, or at least what the proper term for this hardware is so I can search for it?

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As far as I know, what you're looking for doesn't exist as a flush bolt. If you think about it, you'd need to do quite a bit of woodworking on the door in order to install a mechanism that actuates rods at the top and bottom of a door via a handle in the center. This type of arrangement DOES exist in surface bolts, where the rods connect to the door externally -- think commercial door hardware.

However, there may be a different way to accomplish what you're trying to do: Automatic flush bolts. These are actuated not by a handle, but by lever that is pushed on by the other door when it's closed against it. Then, you could use a dummy handle on the door with the flush bolts, and that door will swing freely when the other door is open.

Automatic Flush Bolt

This page describes how they work

  • This might be what I have to go with. I'm not in love with the idea of needing both doors closed in order for the "frame latch" side to actually latch into the frame, but the primary problem to solve is ensuring that air pressure from a cross breeze doesn't try to nudge the doors open a bit, breaking a sound seal I will have in place. – AgmLauncher Jun 5 at 2:30
  • They make a cremone bolt hardware but Baldwin mounts on outside of door ,many types. Marvin makes a multi point hardware set.Need the tools to do it ,pricey .Or your basic flush mount hardware most used these days. – user101687 Jun 5 at 21:53
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I think this is the type of lock you need. It fits flush along the rebate edge of the door. The 'master' lock is on the door that opens first, the 'slave' lock is on the second door.

https://www.coastal-group.com/Maco-Tricoat-Double-Door-Lock-Options

https://www.toolfixservices.com/ProductGrp/door-hardware/multi-point-locking-systems/00040003000b/Winkhaus-FGTE-Slave-Door-Multipoint-Lock

The surface type of bolt is 'espagnolette' and the bolts that go up and down into the frame are 'shootbolts'

I think you're looking for a 'slave door multipoint lock'

These are UK sites though. If you're outside the UK, terminology may vary.

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They are called surface bolts if I'm understanding you correctly. I don't recall seeing any handle actuated, but I have seen tumbler actuated.

Edit: I was misunderstanding what you are looking for, you're right, flushbolts are indeed the name I have always heard. I don't recall seeing any handle actuated though.

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