It should be measured from the floor surface to the bottom of the door.
Space between door and floor.
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 number is regardless of flooring.
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.
Measure the distance between the door frames at the floor.
To fix the issue the doors need to be removed bottom of the jambs cut and reset the door.
During installation of a frame and during the initial formation 1 2 cm gaps should be left for foaming.
A gap of 4 cm is allowed for convenient and safe door opening.
You simply describe the gap take a picture of it or.
The standard i use is 1 2 over finish floors 3 4 is acceptable.
Gaps between door casing and laminate flooring are common and manufacturers have designed a wide variety of special pieces for this purpose.
The door gap to the floor should be 5 8 to 3 4 inch.
If each room has individual air returns the numbers can be smaller for personal taste.
This allows for proper air exchange between rooms.
Transfer this measurement to the threshold put on a pair of safety glasses and cut it to this length with a hacksaw or jigsaw.