Install a commercial grade double sided deadbolt into the active side of the door or alternatively install a double side high security deadbolt into the active side of the french door.
Securing french door from inside.
Out of all the locking options to secure a french door a single sided deadbolt is the best option.
Use a door barricade.
This means anyone can remove the pins and take the doors off the hinges.
Traditional wood french doors have many small panes of glass.
When french doors open outward the hinges are exposed on the outside.
Install a concealed lock for french doors.
However a deadbolt that locks both doors together and single sided deadbolts in the top and bottom of both doors are a good combination for securing both doors.
Because french doors have no center frame or support they are very weak in the center.
The best french door security will have a 3 point locking system.
9 highly effective methods 1.
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This alone will make it a lot more difficult for a burglar to force the doors open.
For doors that come as a pair consider locking securing one of them permanently.
Add one side half deadbolts to the top and bottom of each door.
Alternatively glue and screw a stop on the inside edge of the fixed door.
The purpose of multi point locks is to secure the door at.
My absolutely favorite method is the nightlock security door barricade from amazon.