This number is regardless of flooring.
Space between door and floor.
How to create gaps when installing interior doors.
I have never seen a door set with that big of a gap unless it was to get past floors that were not level.
This allows for proper air exchange between rooms.
That is a lot of room for unlevel you have there.
Measure the distance between the door frames at the floor.
If each room has individual air returns the numbers can be smaller for personal taste.
It should be measured from the floor surface to the bottom of the door.
You simply describe the gap take a picture of it or.
The door gap to the floor should be 5 8 to 3 4 inch.
Gaps between door casing and laminate flooring are common and manufacturers have designed a wide variety of special pieces for this purpose.
During installation of a frame and during the initial formation 1 2 cm gaps should be left for foaming.
Between a leaf of interior doors and the floor it is required to leave a gap of at least 2 2 5 cm to provide natural ventilation.
A gap of 4 cm is allowed for convenient and safe door opening.
To fix the issue the doors need to be removed bottom of the jambs cut and reset the door.