The issue with the door latch stuck only when you are attempting to open a closed door but not when the door is open you might have a misaligned strike plate.
Stuck bottom latch french door.
This was a set of outswing patio french doors aluminum clad jeld wen 3 point mortise lock with the shoot bolts top and bottom stuck in locked position.
Interior french doors with bore holes.
For rooms you would like to be able to lock or just prefer to have a working knob or lever that latches you will want to purchase french doors that are already drilled with a cross bore hole on one side and a latch bore on the other.
The latch is a small but vital component of any french door.
Generally when you have a set of double doors one of the doors is inactive the majority of the time and the other door closes into it.
The reason the strike plate has become misaligned might have something to do with moisture expanding the wood of your door or perhaps even an issue with the foundation of your.
Even a small increase is enough to make a door stick.
Using a utility knife.
The first thing you can try for opening a jammed latch is to slide a plastic card e g.
The internet will tell you to expose the side of mortise lock behind the trim multitool or drill chisel etc.
Push or pull on the door without pulling the barrel bolt lever or pulling on the small chain.
Check the french doors for any distortion expansion and cracking.
How to adjust the top latch on french doors locate the problem.
In other words the hinges are on the outside and the doors close together in the middle.
Step 2 spray the inside mechanics of the french door knob thoroughly using canned air duster to dislodge any dust or other large buildup.
The key here is deciphering if the problem is with the latch itself or with the door.
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These are not the only possible reasons a door latch is stuck but they are the most likely to be the issues you are facing.
Wood that is exposed to the elements can expand in size.
A credit card between the door and the frame where the latch is located.
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Slide in the card forcefully and play with it a bit while shaking the door a bit too at the same time.
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You can do this simply by opening the door and attempting to engage the latch.
This will hopefully force back the latch and the door will open.
Flush bolts are used most often on french doors.
Decide which direction the plate needs to be moved to align the bolt with the hole.
And look for a sliding mechanism.
If your latch keeps getting stuck it could make your doors unusable over time.
Step 2 rectify the problem.
Let s say the cross bore hole is on the right handed door.
The inactive door is held closed with a flush bolt at the top and bottom.
Disassemble the door knob that contains the lock on the french doors using a screwdriver to loosen and remove the bolts so that each half falls away from each other.