It s not uncommon for a gap or crack to exist where the two doors come together.
How much of a gap between french doors.
Unlike interior doors gaps between a front door and a frame must go with the standards not so much due to the possible expansion of a leaf but because of the danger of penetration of cold air and extraneous sounds from outside.
French doors can be a weak point for letting moisture light sounds bugs cold air and dirt into your home.
Because one or both of the french doors are moving many traditional weatherstripping solutions just don t apply.
I ve installed many pre hung interior french doors with great success.
When calculating the width remember there are three gaps between the doors instead of two plus a jamb on each side of the opening.
Close the gap between the two doors with insulated molding.
Nail it to one of the doors using small wood nails so that it overlaps the other door by about one half inch covering the gap.
Gaps between a front door and a frame.
Turn the upper hinge adjustment screw to even out the gap.
This adjustment works well if you have a gap between the french doors or the latch mechanism doesn t connect.
The gap around all the doors and in between the two doors needs to be consistent and as equal as possible.
Cover the nail heads with wood putty and sand them smooth.
So if the doors are 24 inches wide leave a 1 4 inch gap between doors and between each door and the jamb.