Since the actual doors in your new french doors are undoubtedly perfectly square this means that if the reveal or spacing in between the doors and the frame are equal then the overall door frame is square.
Interior french door gap.
This adjustment works well if you have a gap between the french doors or the latch mechanism doesn t connect.
Do this on both doors.
A 1 2 gap is much too large.
It s not uncommon for a gap or crack to exist where the two doors come together.
Re attatch the hinge with the cardboard trace to the jamb.
With two doors in an opening you need to back bevel each door about 5 degrees.
Turn the upper hinge adjustment screw to even out the gap.
French doors can be a weak point for letting moisture light sounds bugs cold air and dirt into your home.
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The cardboard behind the hinges pushes the door out further as a result minimizing the reveal in between the 2 doors.
This is so the two meeting corners do not touch each other.
The interior french door jambs need to be parallel.
Remove hinge from jamb one at a time top to bottom 2.
Place a piece of cardboard over the hinge strike plate and trace it out.
This is also done on single doors so you can get the 1 8 gap at closing between the door and frame.