A 1 2 gap is much too large.
Interior french door gap.
French doors can be a weak point for letting moisture light sounds bugs cold air and dirt into your home.
Do this on both doors.
The cardboard behind the hinges pushes the door out further as a result minimizing the reveal in between the 2 doors.
This is also done on single doors so you can get the 1 8 gap at closing between the door and frame.
Because one or both of the french doors are moving many traditional weatherstripping solutions just don t apply.
With two doors in an opening you need to back bevel each door about 5 degrees.
19 7 feet long weather stripping seal strip for doors windows self adhesive backing seals large gap from 5 16 inch to 11 20 inch soundproofing seal strip 4 3 out of 5 stars 401 9 97 9.
The interior french door jambs need to be parallel.
Remove hinge from jamb one at a time top to bottom 2.
Re attatch the hinge with the cardboard trace to the jamb.
Place a piece of cardboard over the hinge strike plate and trace it out.
Turn the upper hinge adjustment screw to even out the gap.
The two door jambs must be installed plumb parallel and in the same plane.
This is so the two meeting corners do not touch each other.
It s not uncommon for a gap or crack to exist where the two doors come together.