I have never seen a door set with that big of a gap unless it was to get past floors that were not level.
Space between door and floor.
The standard i use is 1 2 over finish floors 3 4 is acceptable.
A gap of 4 cm is allowed for convenient and safe door opening.
It should be measured from the floor surface to the bottom of the door.
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.
You simply describe the gap take a picture of it or.
Measure the distance between the door frames at the floor.
Transfer this measurement to the threshold put on a pair of safety glasses and cut it to this length with a hacksaw or jigsaw.
This allows for proper air exchange between rooms.
How to create gaps when installing interior doors.
If each room has individual air returns the numbers can be smaller for personal taste.
Door clearance although this is a broad term it usually refers to the space between the top of the door and header rabbet or bottom of the door and finished floor.
The door gap to the floor should be 5 8 to 3 4 inch.
During installation of a frame and during the initial formation 1 2 cm gaps should be left for foaming.
Gaps between door casing and laminate flooring are common and manufacturers have designed a wide variety of special pieces for this purpose.